HomeMy Public PortalAboutRES-CC-2017-46CITY OF MOAB
RESOLUTION #46-2017
A RESOLUTION ADOPTING THE WATER SYSTEM DESIGN CRITERIA MANUAL,
WASTEWATER COLLECTION SYSTEM DESIGN CRITERIA MANUAL, AND APWA
MANUAL OF STANDARD SPECIFICATIONS (UTAH CHAPTER)
WHEREAS, the City, to maintain the quality of new infrastructure improvements, desired to assess and
update its minimum criteria and standards for said improvements; and,
WHEREAS, the Moab City Council (Council) approved Ordinance No. 2017-02, a temporary moratorium
on new commercial site plan applications pending the revision of city ordinances relating to said criteria
and standards; and,
WHEREAS, with the aid of a consultant, Hansen, Allen & Luce, Inc., appropriate criteria and standards
were developed or selected from existing sources.
NOW, THEREFORE, be it Resolved by the Moab City Council, that the Water System Design Criteria
Manual, Wastewater Collection System Design Criteria Manual, and APWA Manual of Standard
Specifications (Utah Chapter) are adopted.
PASSED AND APPROVED in open Council by a majority vote of the Governing Body of Moab City
Council on August 8, 2017.
SII jD:
David L. Sakrison, Mayor..
A
Rachel Stenta, Recorder
t
WASTEWATER COLLECTION
SYSTEM DESIGN CRITERIA MANUAL
Effective Date: July 26, 2017
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Table of Contents
Contents
1.1 Introduction 1
1.2 Jurisdiction 1
1.3 Purpose 1
1.4 Amendments and Revisions 1
1.5 Enforcement Responsibility 2
1.6 Review and Acceptance 2
1.7 Interpretation 2
1.8 Relationship to Other Standards 3
1.8.1 State Public Wastewater System Code and Rules 3
1.8.2 State Construction Code 3
1.9 Variances from these Criteria 3
1.10 Adoption of the Utah Chapter of the American Public Works Association (APWA) Standard Plans
and Specifications 3
1.11 Gray Water Irrigation Systems 3
1.12 Special Wastes and Industrial Pre -Treatment 4
1.13 Acronyms 5
1.14 Definitions of Terms 6
2.1 Introduction 9
2.2 Planning Policy 9
2.3 Design Policy 9
2.4 Construction of Public Improvements Policy 9
2.5 Ownership of Public Improvements Policy 10
2.6 Operations and Maintenance Policy 10
2.7 Hazard Minimization and Public Safety Policy 10
2.8 Duty of the Engineer Preparing Development Documents 11
3.1 Introduction 12
3.2 Review Process 12
3.2.1 Pre -Application Consultation 12
3.2.2 Wastewater Utility Report Requirements 12
3.2.2.1 Format 12
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3.2.2.2 Stand -Alone Document 12
3.2.2.3 Submittal Adequacy 13
3.2.3 Review by Referral Agencies 13
3.3 Acceptance 13
3.3.1 Final Utility Report Required for Construction 13
3.3.2 Approval Limitation for Final Utility Report 13
3.4 Preliminary Wastewater Utility Report 13
3.4.1 Wastewater System Modeling 16
3.5. City Designation of Connection Points 16
3.6. Geotechnical Investigation and Report 16
3.7 Final Wastewater Utility Report 16
3.7.1 Wastewater System Modeling 19
3.7.2 Disclaimer 19
3.8 Construction Drawings 19
3.8.1 Wastewater System Improvements 19
3.8.2 Indemnification Statement 19
3.8.3 Construction Drawing Requirements 20
3.8.3.1 Wastewater Utility Construction Drawings 20
3.9 Record Drawings 22
4.1 Design Criteria - Reference Design Documents 23
4.2 Prohibited Installations 23
4.3 Unlawful Connections 23
4.4 Minimum Wastewater System Design Criteria 24
4.4.1 Design Flows 24
4.4.2 Hydraulic Design 24
4.4.3 Pipe Sizes and Grades 25
4.4.4 Selection of Pipe Material 25
4.4.5 General Wastewater System Layout Criteria 25
4.4.5.1 Location 25
4.4.5.2 Horizontal Layout 25
4.4.5.3 Vertical Layout 26
4.4.5.4 Sanitary Sewer Main Crossing a Water Main 26
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4.4.5.5 Sanitary Sewer Main Crossing of a Storm Drain 26
4.4.5.6 Limits on Minimum Vertical Clearance 26
4.4.6 Bored Crossings 26
4.4.7 Manholes 27
4.4.7.1 Layout 27
4.4.7.2 Manhole Sizing 28
4.4.7.3 Drop Manholes 28
4.4.7.4 Main Connections to Existing Manholes 29
4.4.7.5 Sanitary Sewers and Manholes Greater than 20 Feet 29
4.4.8 Inverted Wastewater Siphons 29
4.4.9 Fill Areas 29
4.4.10 Future Connections 29
4.4.11 Sanitary Sewer Service Lines 29
4.4.12.1 Ownership 29
4.4.12.2 Layout 30
4.4.12.3 Cleanouts 30
4.4.12.4 Structural Requirements 30
4.5 Easements 30
4.6 Sand/Oil and Grease Interceptors 31
5.1 Sewage Pump Stations (Lift Stations) and Force Mains 32
5.1.1 Scope 32
5.1.2 Compliance with State of Utah Standards 32
5.1.3 City Review and Approval 32
5.1.4 Flood Protection 32
5.1.5 Accessibility and Security 32
5.1.6 Grit 32
5.1.7 Station Ventilation 32
5.1.8 Odor Control 33
5.2 Minimum Lift Station Design Criteria 33
5.3 Pump Equipment and Protection 34
5.3.1 Pump Characteristics 34
5.3.2 Pump Protection 35
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5.4 Overflow Basins 35
5.5 Force Main Design Criteria 35
5.5.1 Pipe Materials 35
5.5.2 Velocity and Pipe Diameter 35
5.5.3 Pipe and Design Pressure 35
5.5.4 Shutoff and Check Valves 35
5.5.5 Isolation Valves 36
5.5.6 Combination Air Release and Air/Vacuum Valves 36
5.5.7 Drain Valves 36
5.5.8 Cleanouts 36
5.5.9 Termination 36
5.5.10 Identification 36
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Chapter 1. General Provisions
1.1 Introduction
These criteria and design standards together with all future amendments shall be known as the
The City of Moab Wastewater Collection System Design Criteria Manual (hereafter called
"Criteria"). All utility reports and plans, analyses, and designs, submitted as a requirement of the
City of Moab Regulations (hereafter called "Regulations"), shall comply with these Criteria.
1.2 Jurisdiction
These Criteria shall apply to all land within the incorporated area of the City of Moab, or served
by the City, including any public lands. These Criteria shall apply to all systems and facilities
constructed in or on City Rights -of -Way, easements dedicated for utilities across public or
private property, easements for public use, and to all privately owned and maintained system
facilities.
1.3 Purpose
Presented in these Criteria are the policies and minimum technical criteria for the planning,
analysis and design of wastewater collection systems within the boundaries of the City of Moab
and areas served by the City. All subdivisions, site plans or any other proposed construction
submitted for acceptance under the provisions of the Regulations shall include adequate and
appropriate wastewater system planning, analysis, and design. Such planning, analysis, and
design shall conform with or exceed the Criteria set forth herein. Wastewater collection system
planning, analysis, and design that require policies and technical expertise not specifically
addressed in these Criteria shall follow the provisions of the Utah State Code and Utah Code
Annotated. In the event of a conflict, the State of Utah Codes and Rules will prevail.
Interpretation will be provided by the City of Moab and/or the Utah Department of
Environmental Quality, Division of Water Quality.
1.4 Amendments and Revisions
Policies and criteria may be amended as new technology is developed or if experience gained in
the use of these Criteria indicates a need for revision. All technical criteria and policy changes
must be recommended by the City Engineer or Public Works Director. Minor revisions will
require the approval of the City. All major revisions will require adoption, by resolution or
ordinance of the City Council. The City Engineer may approve minor revisions and technical
changes.
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Chapter 1. General Provisions
TABLE 1-1 EXAMPLES OF MINOR AND MAJOR REVISIONS
MINOR
MAJOR
Grammar
Policy Changes
Submittal Requirements
Clarifications
Construction Detail Revisions for
clarification, minor modification
Technical Criteria Changes
1.5 Enforcement Responsibility
The City shall review all wastewater system reports, plans, analyses, and designs, submitted as a
requirement of the Regulations, for compliance with these Criteria. The Regulations are enforced
by the City of Moab and authorized representatives.
1.6 Review and Acceptance
The City shall review all submittals for general compliance with these Criteria. An acceptance by
the City does not relieve the Owner, Engineer, or Designer from the responsibility of ensuring
that the design, calculations, plans, specifications, construction, and record drawings are in
compliance with these Criteria, and in compliance with other applicable State and Federal
regulations.
The City may, but is not required to, refer submittals to other agencies that have an interest or
responsibility for wastewater system issues. Other review agencies may include regional, State,
or Federal agencies responsible for wastewater collection, industrial pretreatment, treatment and
other wastewater related issues.
1.7 Interpretation
In the interpretation and application of these Criteria, the provisions shall be regarded as the
minimum requirements for the protection of the public health, safety and welfare of the residents
of the City. These Criteria shall therefore be regarded as remedial and shall be liberally construed
to further its underlying purposes.
Whenever a provision of these Criteria and any other provision of the Regulations or any
provision in any law, ordinance, resolution, rule or regulation of any kind, contains any
requirement(s) covering any of the same subject matter, the requirements that are more
restrictive or impose higher standards shall govern, as determined by the City.
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Chapter 1. General Provisions
These Criteria shall not abrogate or annul any binding agreements, Development Improvement
Agreements, easements, permits, utility reports or construction drawings accepted by the City
prior to the effective date of these Criteria.
1.8 Relationship to Other Standards
1.8.1 State Public Wastewater System Code and Rules
Public wastewater systems in the State of Utah are governed by the State of Utah Code,
Annotated and the Utah Administrative Code. These codes and rules apply to policy, planning,
criteria and construction of public water facilities and prevail if a conflict exists within the
Criteria.
1.8.2 State Construction Code
The State of Utah Construction codes and rules, with amendments, are incorporated by reference.
These codes and rules apply to policy, planning, criteria and construction of public wastewater
facilities and prevail if a conflict exists within the Criteria.
1.9 Variances from these Criteria
Modifications to these Criteria shall require a formal variance request. Variances from the
provisions of these Criteria may be considered on a case -by -case basis for specific
applications only, and shall not establish a precedent for any other project or future
development.
1.10 Adoption of the Utah Chapter of the American Public Works
Association (APWA) Standard Plans and Specifications
The latest Utah APWA Manual of Standard Plans and Manual of Standard Specifications and
drawings are hereby adopted as the City of Moab Standard Details and Standard Specifications
for wastewater system improvements. Variance from these standards must be approved by the
City. In the event that multiple standards or sections of the standard apply, the City will
determine the applicable standard.
1.11 Gray Water Irrigation Systems
Gray water irrigation systems within the City of Moab are regulated by the Southeastern Utah
Health Department (Health Department). Application for graywater systems must be made to
the Health Department. Graywater systems must comply with Health Department requirements
and the Utah Administrative Code {R317-401 U.A.C.{.
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1.12 Special Wastes and Industrial Pre -Treatment
The City shall be notified of any potential waste streams that are different than typical residential
wastes in quantity or characteristics. Specifically, the following pollutants are prohibited:
• Pollutants which create a fire or explosion hazard in the City wastewater treatment plant
(WWTP) or collection system, including, but not limited to, waste streams with a closed
cup flashpoint of less than 140°F (60°C);
• Pollutants which will cause corrosive structural damage to the WWTP or collection
system. Discharges with a pH lower than 5.0 or greater than 10 are prohibited;
• Solid or viscous pollutants in amounts which will cause obstruction to the flow in the
system resulting in interference;
• Any pollutant, including oxygen demanding pollutants (BOD, etc.) released in a
discharge at such volume or strength as to cause interference in the WWTP or collection
system;
• Heat in amounts, which will inhibit biological activity in the WWTP, resulting in
interference, but in no case, heat in such quantities that the influent to the sewage
treatment works exceeds 104°F (40°C);
• Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin in amounts
that will cause interference or pass through;
• Pollutants which result in the presence of toxic gases, vapor, or fumes within the WWTP
or collection system in a quantity that may cause health or safety problems;
• Any trucked or hauled pollutants, except at discharge points designated by the WWP; or
• Any substance that contains concentrations of constituents greater than those specified in
Table 1-2.
TABLE 1-2 LIMITS TO WASTEWATER DISCHARGE
CONSTITUENT
CONCENTRATION (mg/L)
Total solids (TS)
600
Volatile solids
300
Total suspended solids (TSS)
250
Volatile suspended solids
200
5-day Biochemical oxygen demand (BOD5)
200
Chemical oxygen demand (COD)
500
Total Nitrogen (TN)
60
Ammonia (NH4)
10
Total Phosphorus (TP)
10
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Chapter 1. General Provisions
These special wastes may require pre-treatment, which includes providing any necessary
treatment technology, equipment, disposal, and expert operators necessary for proper treatment.
This proper treatment includes all resources necessary such that the waste stream delivered to the
City of Moab wastewater collection and treatment facilities meets the above criteria and is
acceptable to the City. The waste stream may not cause or facilitate violation of the facility's
Utah Division of Water Quality discharge permit, volume and flowrate capacities and processing
limitations. The developer/owner must meet with the City prior to connection to determine the
specific requirements for special wastes.
1.13 Acronyms
As used in this Manual, the following acronyms shall
apply:
ANSI
APWA
ASTM
BOP
CD and CDs
DIA
HP
IPC
IRC
LP
Max
Min
MDD
MG
MGD
NAVD
O&M
OSHA
PDF
PE
PSI
PVC
SCADA
TOP
OWTS
American National Standards Institute
American Public Works Association
American Society for Testing and Materials
Bottom of Pipe
Construction Drawing(s)
Development Improvement Agreement
High Point
International Plumbing Code
International Residential Code
Low Point
Maximum
Minimum
Maximum Day Demand
Million Gallons
Million Gallons per Day
North American Vertical Datum
Operation and Maintenance
Occupational Safety and Health Administration
Peak Design Flow or Portable Document Format
Professional Engineer
Pounds per Square Inch
Polyvinyl Chloride
Supervisory Control and Data Acquisition
Top of Pipe
On -Site Wastewater Treatment System
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Chapter 1. General Provisions
1.14 Definitions of Terms
CITY shall mean the City of Moab, Utah.
CITY COUNCIL means the Moab City Council.
CITY ENGINEER shall mean the City of Moab Engineer or other authorized representative of
the Engineering Department.
CODE or MUNICIPAL CODE shall mean the City of Moab Municipal Code, as amended.
CONSTRUCTION DRAWING(S) (CD or CDs) shall mean Construction Drawings prepared by
a Professional Engineer licensed in the State of Utah for the Developer and approved by the City
depicting Public and/or Private Improvements to be constructed for the Project.
CRITERIA or DESIGN CRITERIA shall mean the design criteria and requirements contained
herein for wastewater facilities to be constructed in the City.
DETAILS or STANDARD DETAILS shall mean details issued by City to be used or referenced
in the Construction Drawings.
DEVELOPER shall mean the party or parties desiring to construct Public and/or Private
Improvements within City rights -of -way or easements, securing all required approvals and
permits from the City and other applicable entities, and assuming full and complete
responsibility for the Project.
DEVELOPMENT IMPROVEMENT AGREEMENT (DIA) shall mean a formal agreement
between a Developer and the City that addresses development conditions and obligations.
EASEMENT shall mean the right of the City to use lands owned by a another party for the
purposes of maintenance, access, utilities, drainage or other use, as specified in an agreement
between the City and the other party.
ENGINEER shall mean the Professional Engineer retained by the Developer responsible for the
creation and submission of utility reports and construction drawings to the City for approval for
the purpose of one-time construction of facilities.
ENGINEERING DEPARTMENT shall mean the City of Moab Engineering Department.
GRAY WATER shall mean untreated wastewater, which has not come into contact with toilet
waste. Graywater includes wastewater from bathtubs, showers, bathroom washbasins, clothes
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Chapter 1. General Provisions
washing machines, laundry tubs, etc., and does not include wastewater from kitchen sinks, photo
lab sinks, dishwashers, garage floor drains, or other hazardous chemicals
LIFT STATION shall mean a sewage pumping station.
MUNICIPAL CODE — See CODE.
OWNER shall mean the person(s) in title to any portion of the Property, according to the records
of the Grand County Clerk and Recorder. The use of the singular "Owner" shall refer to all
Owners of the Property.
PRIVATE IMPROVEMENTS shall mean those improvements not identified as Public
Improvements, and which are not generally installed within the City rights -of -way, easements, or
other City -owned lands.
PROFESSIONAL ENGINEER shall mean an individual currently registered with the Utah
Division of Professional and Occupational Licensing as a professional engineer.
PROJECT shall mean the Public or Private Improvements as designated in the approved
Construction Drawings to be constructed in conformance with these Design Criteria. The Project
is inclusive of any and all Public or Private Improvement Projects for or within the City, whether
Development Projects, Private Utility Projects, Capital Improvement Projects or other types of
proj ects.
PROPERTY shall mean the real property located in the City of Moab.
PUBLIC IMPROVEMENTS shall mean those public facilities including, but not limited to,
pavement, curb and gutter, sidewalk, pedestrian/bike/equestrian paths, storm drain facilities with
related appurtenances, culverts, channels, bridges, water distribution, transmission and storage
facilities with related appurtenances, wastewater collection facilities with related appurtenances,
water purification facilities, pavement markings/signage/striping, traffic signals and related
appurtenances, and those processes integral to construction of other Public Improvements listed
herein, which upon their completion are to be dedicated to the City for operation and
maintenance by the City and which are installed within the City rights -of -way, easements, or
other City -owned lands.
PUBLIC WORKS DIRECTOR shall mean the City of Moab Public Works Director
REGULATIONS shall mean the Charter, ordinances, resolutions, rules and regulations of the
City, including the Code, and other provisions of all zoning, subdivision and building codes or
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Chapter 1. General Provisions
any other applicable design criteria adopted by the City, as the same may be amended
periodically and applied uniformly throughout the City.
SHALL shall mean a mandatory requirement or condition, as approved by the City.
STANDARD DETAILS — See DETAILS.
VARIANCE REQUEST shall mean a formal request with adequate documentation and
justification for a variance from the standards, provisions, policies or submittal requirements set
forth in these Design Criteria that meets the requirements in Section 1.9 of these Design Criteria.
WASTEWATER MASTER PLAN shall mean the City of Moab Wastewater Master Plan.
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Chapter 2. Wastewater Collection System Policies
2.1 Introduction
Provisions for adequate service, wastewater collection and treatment are necessary to preserve
and promote the general health, welfare, and economic well-being of the residents of the City of
Moab. The City of Moab must provide coordination, review, and master planning of the system
in order that the integration of each component of the system meets the intent and purpose of the
system as a whole. The development of the City's wastewater system is governed by the policies
provided below, as facilitated through the implementation of the Criteria contained herein.
2.2 Planning Policy
All developments on land within the City that are served by the City's public wastewater system
shall provide planning and design for wastewater loadings, including peaking factors. Reports
and plans shall be submitted for all new development and redevelopment within the City
jurisdiction. These reports shall conform to the requirements set forth herein and the provisions
otherwise stipulated by the City during the development process. Redevelopment shall be
defined as any land disturbance or reconstruction that results in a reconfiguration of existing
wastewater system facilities or an increase in demands.
During the initial planning stages of the development, a pre -application meeting shall be
coordinated with the City. One purpose of this meeting is to assist the City and the developer to
determine the level of wastewater service that is available and needed by the developer.
2.3 Design Policy
Wastewater system planning and design within the City shall adhere to the Criteria contained
herein, the administrative rules promulgated by the Utah Division of Water Quality, the Utah
Division of Water Rights (as related to return flows) and acceptance procedures of the City.
Prohibited facilities and connections shall be as described in these Criteria.
2.4 Construction of Public Improvements Policy
The construction of improvements for and within the City shall conform to the City's
construction permit, standard details and approved plans, and shall adhere to all City, County,
State, and Federal regulations applicable to the work. This shall include the acquisition of all
necessary permits, which may include, but not be limited to, stream alteration permits, discharge
permits, road cut permits, flood plain related permits and letters (including FEMA review and
approval when applicable), Utah Division of Water Quality approvals, traffic control permits
and all other required permits and approvals. At the completion of construction, all permits and
service agreements with power companies and any other private utilities shall be transferred into
the Developer's name, and shall under no circumstances be transferred to, or held in the name of
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the City, unless the City is the customer. Any work proposed to take place within existing City of
Moab streets must be reviewed and approved by the City. The type of crossing allowed, traffic
control, street repair specifications, etc. shall be as determined by the City.
Prior to placing the facilities into service and initial acceptance by the City, all construction
related provisions required by the City shall be satisfied, including startup procedures,
inspections and testing of the facilities, and receipt of O&M Manuals and Record Drawings.
Additionally, the developer shall comply with warranty requirements included in the
Developments Improvements Agreement (DIA).
2.5 Ownership of Public Improvements Policy
The delineation between City -owned and privately owned portions of the system and the
associated maintenance responsibilities for each, shall be as set forth in the latest editions of the
Municipal Code and Standard Details. Upon execution of Final Acceptance, sanitary sewers,
force mains, lift stations, and all appurtenant City -owned facilities, shall become the sole
property of the City, and full legal and equitable title thereto shall be vested in the City free and
clear of any liens, claims or rights of any third party in or to the Public Improvements.
2.6 Operations and Maintenance Policy
The design of all wastewater system facilities within the City must provide for access and long-
term operation and maintenance of the facilities by the City. Operation and Maintenance manuals
associated with all components to be installed as part of the wastewater system shall be provided
to the City with the Record Drawings, unless otherwise specifically waived by the City.
Utility easements or tracts and access easements shall be provided for all wastewater system
facilities outside of public right-of-way as set forth in these Criteria, or as otherwise required by
the City, and shall be adequate for the operation, maintenance and replacement of the facilities.
2.7 Hazard Minimization and Public Safety Policy
Public safety and the protection of City staff shall be an essential objective when planning,
designing, constructing, operating and maintaining the City's wastewater collection system
facilities. All such facilities shall be designed with careful consideration of the potential hazards
associated with the use and long-term operation and maintenance of the facility. The design
phase of all projects shall evaluate the health and safety risks associated with the facilities, and
shall include appropriate design features to minimize these risks and to adequately protect the
general public and City personnel from the hazards. Equipment for confined space entry in
accordance with OSHA and other applicable regulatory agency requirements shall be provided at
all City of Moab facilities, as required. Hatches with fall prevention covers, intermediate
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platforms, handrails, safety lighting, ventilation etc. shall be as required by the City, or any
applicable code.
2.8 Duty of the Engineer Preparing Development Documents
These standards establish criteria and policies for the design and subsequent construction of the
City's public wastewater system. These standards are not intended to substitute for engineering
knowledge, judgement or experience. It is the responsibility of the design (development)
Engineer to understand and apply sound engineering principals related to public wastewater
systems to the planning, design and construction of wastewater system improvements. It is also
the responsibility of the Engineer to understand all federal, state and local regulations related to
the public wastewater system.
These criteria should be reviewed by the Engineer, who shall evaluate their applicability. If the
Engineer identifies criteria that are inapplicable or inappropriate in a specific location or specific
situation, the engineer shall bring the issue to the attention of the City.
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Chapter 3. Wastewater Collection System Submittal Requirements
3.1 Introduction
The requirements presented in this chapter shall be used to aid the Engineer or Applicant in the
preparation of utility reports, modeling evaluations, and Construction Drawings for wastewater
system facilities. This Chapter applies primarily to submittal requirements for wastewater
collection systems and the associated Criteria provided in Chapter 4. The requirements
presented herein are the minimum necessary, and will be used to evaluate the adequacy of all
submittals made to the City.
3.2 Review Process
3.2.1 Pre -Application Consultation
A pre -application consultation with the City of Moab Planning Department is strongly
encouraged for any type of development or redevelopment. The purpose of this meeting is to
discuss general information about the project, pertinent aspects of the Criteria, the required scope
of the utility reports, and any special procedures, analyses, and submittal requirements that may
be applicable.
3.2.2 Wastewater Utility Report Requirements
Preliminary and final wastewater utility reports shall be provided to the City of Moab. The
purpose of the preliminary wastewater utility report is to identify existing wastewater
infrastructure, provide preliminary estimates of wastewater loading, provide an initial plan for
wastewater infrastructure and determine the feasibility of providing wastewater service to the
development via the public wastewater collection system. The purpose of the final wastewater
utility report, which is to be submitted with the final construction plans, is to identify the final
wastewater infrastructure plan.
3.2.2.1 Format
All required reports shall be prepared on 81/2" x 11" paper (except that maps and figures shall
generally be 11" x 17" or larger) and be bound, and shall follow the format contained in the
report checklists. Supporting drawings, figures, and tables shall be bound into the reports or
included in an attached pocket. Reports shall include a narrative presenting the project for review
in accordance with the information presented in these Criteria, and the requirements established
by the City for the appropriate submittal.
Paper and electronic (PDF) copies of the report shall be provided. Electronic files of computer
models and GIS files shall be provided if requested by the City.
3.2.2.2 Stand -Alone Document
The wastewater utility reports shall be stand-alone documents. When references are made or
assumptions are based on previously submitted reports, the reports must include the appropriate
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Chapter 3. Wastewater Collection System Submittal Requirements
excerpts, pages, tables, and maps containing the referenced information. Assumptions made in
previous reports must be verified and substantiated in subsequent reports. Reports shall be
legible.
3.2.2.3 Submittal Adequacy
Any report with incomplete or missing information shall result in the report being returned
without review. The City reserves the right to require additional information beyond that
specifically required in these Criteria.
3.2.3 Review by Referral Agencies
The review and approval of the project by State, Federal, and local agencies other than the City,
shall be the responsibility of the Developer. The Developer shall be required to address all
referral agency comments, and to have such comments incorporated into the applicable utility
report and plans submitted to the City.
3.3 Acceptance
3.3.1 Final Utility Report Required for Construction
The final wastewater utility report shall conform to the construction documents used to bid the
project, and shall be approved by the City prior to the construction of any wastewater system
improvements.
3.3.2 Approval Limitation for Final Utility Report
The approval of the final wastewater utility report shall expire simultaneously with the expiration
of the approval of the project unless extended in conformance with the provisions of the
Municipal Code. At the time the approval of the final utility report expires, the report shall be
deemed invalid and a resubmittal will be required. In order to be re -approved, it must be
demonstrated that the concepts, designs, and calculations presented in the report are consistent
with the City's current Criteria.
3.4 Preliminary Wastewater Utility Report
The Preliminary Wastewater Utility Report shall review and discuss the existing wastewater
system infrastructure and the wastewater needs of the development. The report shall also
identify the existing infrastructure needed to support the development. The City Engineering
Department and Public Works Department will coordinate with the developer to provide the
wastewater system data needed as an input to the Engineer's design.
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Chapter 3. Wastewater Collection System Submittal Requirements
The following outline sets forth the required minimum content to be provided in the Preliminary
Wastewater Utility Report that shall be submitted:
I. PROJECT INFORMATION
A. Name of Project, including legal name of development.
B. Address.
C. Owner.
D. Developer.
E. Engineer.
F. Submittal date and revision dates as applicable.
II. PROJECT LOCATION AND DESCRIPTION
A. Site Location.
1. Site Vicinity Map.
2. Township, Range, Section, and 14 Section.
3. Streets, Roadways, and Highways adjacent to the proposed development.
4. Names of surrounding or adjacent developments.
B. Description of Property and Land Use.
1. Total area in acres.
2. Total number of equivalent residential units (ERUs) proposed for the
development at build -out with a breakdown of units by type projected by
phase (if applicable) calculated by utilizing the Utah Administrative Code
Minimum Sizing Requirements {R317 U.A.C.}.
3. Area (acres) and land use for all parcels to be served within the
development boundaries.
4. Major and minor drainages and floodplains, including FEMA desigations.
5. Existing irrigation canals or ditches.
6. Significant geologic features and topography.
7. Existing On -Site Wastewater Treatment Systems (OWTS).
8. Existing water wells.
9. Easements/tracts may not be known initially; however, provide a
statement that easements or tracts necessary for utilities will be provided
at time of preliminary site plan, in accordance with City standards
regarding location and size of easements and tracts.
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III. EXISTING WASTEWATER SYSTEM
A. Existing Collection System.
Discuss the existing sanitary sewers, interceptors, lift stations, and force mains in
the vicinity of the development, including sizes and locations that will serve the
proposed development.
IV. ESTIMATED PROPOSED LOADINGS
A. Average Day Loadings.
Estimated hydraulic and BOD5 loadings must be provided for all phases of
development. If wastewater is expected to be typical for residential wastewater,
BOD5 may be assumed to be typical. If typical, this assumption shall be stated in
the report.
B. Peak Loadings.
Estimated peaking factors for hydraulic loadings shall be provided.
C. Special Waste Characteristics (if different from typical residential wastewater).
A detailed listing of special wastewater constituents shall be provided, along with
a detailed description of needed treatment processes. A listing of pre-treatment
processes provided by the project Owner shall be discussed in detail.
V. PROPOSED WASTEWATER COLLECTION SYSTEM
A. Proposed Collection System.
Provide a general overview of the anticipated collection system layout, and
discuss any extensions from the site to the existing wastewater system that are
necessary to serve the development. The locations and types of pipes, manholes,
clean -outs, and other facilities shall be provided.
B. Proposed Wastewater Facilities.
Discuss any anticipated lift stations, force mains, pretreatment facilities, etc., that
will likely be required to adequately serve the development.
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VI. REFERENCES
Reference all criteria, master plans, reports, or other technical information utilized in the
report.
3.4.1 Wastewater System Modeling
The City maintains a wastewater system model. Once the preliminary wastewater system report
is received and found to be adequate, the City will determine whether wastewater system
modeling is required. If the modeling is required, the City will determine the level of modeling
needed for the development and will estimate the cost of modeling. The developer will be
responsible for the cost of wastewater system modeling.
3.5. City Designation of Connection Points
If the City of Moab determines that the Preliminary Wastewater Utility Report meets the
requirements set forth in these Criteria, the City will provide wastewater service at designated
tie-in points.
3.6. Geotechnical Investigation and Report
A geotechnical investigation and report is required to provide a basis for wastewater collection
system design. The investigation must include boreholes or excavations to a depth at least 2-feet
deeper than the bottom of the anticipated trench excavation. Samples shall be collected and
analyzed at a geotechnical laboratory to determine soil classification, moisture contents, dry
density, strength, water level (if detected) and corrosion potential. The investigation shall
identify expansive and collapsible soils. The report shall include recommendations for
foundations backfill, utility and trench construction, and compaction. The report shall include a
discussion of the suitability of the on -site soils for use for the intended purposes.
3.7 Final Wastewater Utility Report
The Final Wastewater Utility Report shall describe final wastewater infrastructure, including
final modeling and calculations. The Final Wastewater Utility Report shall be consistent with
final construction drawings.
The following outline sets forth the required minimum content to be provided in the Final
Wastewater Utility Report that shall be submitted with the Construction Documents:
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I. TITLE SHEET
A. Name of Project, including legal name of Development.
B. Address.
C. Owner.
D. Developer.
E. Engineer.
F. Submittal date and revision dates as applicable.
II. PROJECT LOCATION AND DESCRIPTION
A. Site Location.
1. Site Vicinity Map
2. Township, Range, Section, and 1/4 Section.
3. Streets, Roadways, and Highways adjacent to the proposed development.
4. Names of surrounding or adjacent developments.
B. Description of Property and Land Use.
1. Total area in acres.
2. Discussion of project phasing, if applicable.
3. Total number of ERUs proposed for the development at build -out with a
breakdown of units by type projected by phase (if applicable).
4. Area (acres), land use for all parcels to be served within the development
boundaries (initial and future phases, if applicable) and number of lots.
5. Sizes of schools, commercial and industrial buildings (initial and future
phases, if applicable).
6. Major and minor drainages and floodplains, including FEMA
designations.
7. Existing irrigation canals or ditches.
8. Significant geologic features and topography.
9. Existing On -Site Wastewater Treatment Systems (OWTS).
10. Existing water wells.
III. CALCULATED FLOWS
A. Average Day Loadings.
Estimated hydraulic and BOD5 loadings must be provided for all phases of
development. If wastewater is expected to be typical for residential wastewater,
BOD5 may be assumed to be typical. This shall be stated in the report.
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B. Peak Loadings.
Estimated peaking factors for hydraulic loadings shall be provided.
C. Special Waste Characteristics (if different from typical residential wastewater).
A detailed listing of special wastewater constituents shall be provided, along with a
detailed description of needed treatment processes. A listing of pre-treatment
processes provided by the project Owner shall be discussed in detail.
IV. EXISTING WASTEWATER SYSTEM
A. Existing Collection System.
Discuss the existing sanitary sewers, interceptors, lift stations, and force mains in
the vicinity of the development, including sizes and locations that will need to be
extended to serve the proposed development.
V. PROPOSED WASTEWATER SYSTEM
A. Proposed Collection System.
Provide a description of all proposed wastewater facilities and a general overview
of the anticipated collection system layout, including the proposed line sizes.
Describe the tie-ins to the existing wastewater system and the sizes and lengths of
any extensions necessary to serve the development.
B. Proposed Wastewater Facilities.
Discuss any lift stations, force mains, pretreatment facilities, etc., that will likely
be required to adequately serve the development.
C. Land Dedication Requirements.
Generally describe any portions of the proposed wastewater system that are not
planned to be located in public right-of-way, and will therefore require the
dedication of tracts or utility easements to the City.
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VI. POTENTIAL DEVELOPMENT IMPROVEMENTS AGREEMENT (DIA) ITEMS
Discuss any potential DIA items such as needed off -site improvements, improvements
necessary for a project or project phase to be independently sustainable, etc.
VII. POTENTIAL PERMITTING REQUIREMENTS
Generally discuss all foreseeable Federal, State, County, and Local permitting
requirements associated with the project.
XI. REFERENCES
Reference all criteria, master plans, reports, or other technical information utilized in the
report.
3.7.1 Wastewater System Modeling
The City maintains a wastewater system model. It is anticipated that wastewater system
modeling will be performed once the Preliminary Wastewater Utility Report is submitted. The
results of the City's wastewater modeling should be included in the Final Wastewater Utility
Report. The City of Moab should be notified of any changes. The modeling will be used by the
City as needed. The developer will be responsible for the cost of wastewater system modeling.
3.7.2 Disclaimer
The City is not responsible or liable for assumptions made by the Developer regarding utility
information associated with the proposed development.
3.8 Construction Drawings
3.8.1 Wastewater System Improvements
Wastewater system improvements within public rights -of -way or utility easements are required
to be designed, approved, and constructed in accordance with the City's Regulations, subdivision
requirements of the Municipal Code, the City's Design Criteria and Standard Details, sound
engineering principles, and the conditions of any variances obtained from the City.
3.8.2 Indemnification Statement
Construction Drawings are reviewed by the City of Moab for concept only. The review does not
imply responsibility by the City of Moab for accuracy and correctness of calculations.
Furthermore, the review does not imply that quantities of items on the plans are the final
quantities required. The review shall not be construed for any reason as acceptance of financial
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responsibility by the City for additional quantities of items shown that may be required during
the construction phase.
3.8.3 Construction Drawing Requirements
In general, construction drawings shall include plan and profile drawings that convey the
horizontal and vertical alignment of the improvements, and all other pertinent plans, sections and
detailing necessary to construct the proposed facilities.
All construction drawings submitted to the City for review, comment, and approval of
wastewater system improvements shall be prepared by, or under the direct supervision of a
Professional Engineer licensed in the State of Utah. Said Professional Engineer shall be
responsible for the information contained on the construction drawings, which shall bear the
Professional Engineer's seal prior to final approval for construction.
The Developer, Contractor and Engineer associated with the construction drawings shall be
responsible for the adequacy and satisfactory performance of the designs and the installation of
all items therein, and any failure or unsatisfactory performance of the system, so constructed,
shall not be a cause for action against the City. Approval of the construction drawings by the
City signifies only that the construction drawings meet the minimum stipulations of these design
criteria and City requirements based upon the information provided to the City by the Engineer
and/or Developer, and makes no finding, representation, or warranty that the system and
associated components will perform satisfactorily.
3.8.3.1 Wastewater Utility Construction Drawings
In addition to the general formatting and information to be included on all sheets of a
construction drawing (e.g., north arrow, scale, project boundaries, lot lines, rights -of -way, tracts,
approval blocks, etc.), the following information shall be included on the final Wastewater
Utility Plans.
1. Legend: Each sheet shall show the symbols pertaining to the sheet.
2. Vertical Datum: All elevations used for the planning, design and construction of
facilities shall be on the NAVD88 Datum. No conversion equation is allowed.
3. Horizontal Benchmark and Coordinates: The horizontal benchmark shall be specified.
In order to facilitate the City's GIS mapping efforts, all construction drawings shall be
placed in the State Plane NAD83, Utah Central Zone Coordinate System and include the
coordinates of a known property corner on or adjacent to the site.
4. Plan views shall be oriented so that north is up on the sheet or to the right.
5. Overall Wastewater System Plan: In plan view, provide all information and dimensions
for horizontal layout of proposed sanitary sewer and force mains including but not
limited to manholes, wye connections, sanitary sewer service lines, cleanouts, lift
stations, and any other appurtenances that are part of the wastewater collection system.
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Coordinates shall be provided for the locations of manholes, lift stations and other key
components.
6. Plan views shall show the locations and sizes of all existing and proposed utility lines
and appurtenances (water, sanitary sewer, stormwater, gas, electric, telephone, cable,
fiber optic, etc.) on and adjacent to the site. Plan views shall show the location of all
existing water wells and On -Site Wastewater Treatment Systems (OWTS) on and
adjacent to the site.
7. Plan views shall show existing sanitary sewer and force mains with sizes; manholes;
sanitary sewer service taps and lines; clean -outs; lift stations; and any other
appurtenances that are part of the wastewater collection system on and adjacent to the
site.
8. Plan views shall show existing and proposed curb, gutter, and sidewalks; and all
existing and proposed obstructions, such as vaults, catch basins, traffic islands, street
lights, walls or other permanent structures on and adjacent to the site.
9. Plan views and profiles shall show the tie-ins to the existing wastewater collection
system, including sizes of existing sewers. In addition, the nearest manholes on existing
sewers shall be shown or, at a minimum, the distance to these manholes shall be included
on the CDs.
10. Plan views and profiles shall show all needed off -site improvements, extensions of
service or upgrades to the City's wastewater collection system.
11. Plan views shall show and label as to type and width, all existing and proposed
easements that are on and adjacent to the site. Recordation information shall be included
for all existing easements.
12. Profile views are required for all sanitary sewers and force mains and must show
proposed streets profiles and existing ground surface profiles. The following information
shall be included:
a. All high points (HP) and low points (LP) along the sanitary sewer and force
mains shall be identified;
b. Where required by these Criteria, combination air release and air/vacuum
valves and drain valves shall be shown on force mains, with the TOP elevations
provided.
c. All utility crossings shall be identified.
13. Profile views or plan views: Adequate pipe elevation information is required for all
utility crossings of water, sanitary sewer, force main, stormwater, gas, electric lines, etc.
The following information shall be included:
a. Types and sizes of the utility lines at the crossing and the location of the
crossing.
b. If any pipes at a crossing are to be encased, the coordinates at each end of the
encasement, and the type and thickness of the encasements shall be specified. In
addition, all utility crossing shall include either:
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(1) A reference to the sheet where the crossing information is shown; or
(2) TOP and BOP elevations and vertical clearance at the crossing with a
callout of "(Min. = 1.5')" wherever the clearance is 2 feet or less.
14. Wastewater System Details: All pertinent details related to wastewater system
improvements, such as manholes, outside drop manholes, sanitary sewer service line
connections, sanitary sewer clean -outs, proposed utility crossings, including concrete
blankets, trenching, etc., shall be shown on detail sheets on the construction drawings.
References to the Utah APWA plans may be provided. In this case, the detail drawings
don't need to be provided in the plan set.
3.9 Record Drawings
All wastewater system improvements constructed within public rights -of -way and dedicated
easements must be formally accepted by the City.
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Chapter 4. Wastewater Collection System Design Criteria
4.1 Design Criteria - Reference Design Documents
Standards and reference publications pertinent to the design of wastewater facilities within the
City are listed below. Unless otherwise specified, the latest editions shall apply.
• Utah State Code, Annotated
• Utah Administrative Code
• Utah American Public Works Association (Utah APWA)
• All applicable International Codes recognized by the City including, but not limited to,
the International Building Code (IBC), the International Plumbing Code (IPC), the
International Fire Code (IFC), the International Residential Code (IRC), and the
International Mechanical Code (IMC)
• American Society for Testing and Materials (ASTM)
• American National Standards Institute (ANSI)
• Utah Department of Environmental Quality (UDEQ)
• City of Moab Municipal Code
• City of Moab Wastewater Master Plan
• Gravity Sanitary Sewer Design and Construction (Current Version). Manuals and
Reports on Engineering Practice No. 60. American Society of Civil Engineers/Water
Pollution Control Federation.
4.2 Prohibited Installations
The following installations are prohibited unless otherwise approved by the City. Items listed
below reference sections contained in these Criteria that provide the minimum design
requirements to be addressed should a variance be pursued.
• On -Site Wastewater Treatment Systems (OWTS)
• Private Ejector Pumps and Private Lift stations, unless approved by the City
• Inverted Wastewater Siphons
• Manholes and sewer lines over 20 feet deep
• Elevated Wastewater Pipelines
4.3 Unlawful Connections
It shall be unlawful to discharge roof drainage, foundation drainage, sump pumps, surface
drainage, storm water, solid wastes, or any other illicit discharges to the wastewater collection
system..
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4.4 Minimum Wastewater System Design Criteria
This section presents the minimum technical criteria for the analysis and design of wastewater
systems within the boundaries of the City of Moab and other areas served by the City, including
collection sewers, sanitary sewer service lines, and the applicable appurtenances associated with
these installations. Any special criteria beyond those contained herein, and as determined
necessary by the City, shall be discussed at the pre -application consultation (or as the issue
arises).
4.4.1 Design Flows
Average daily loadings, peaking factors and average annual loadings shall be based on the
criteria included in the current Utah Administrative Code and based upon information included
in the Wastewater Master Plan. This information is currently located at {R317-3 U.A.C.}. The
City may adjust the loading values based on the evaluation of actual use data, a current master
plan or other conditions determined to affect the safety and welfare of the public.
4.4.2 Hydraulic Design
Wastewater systems shall be designed to provide a minimum velocity of 2.0 feet per second at
the peak design flow. In situations where the minimum velocity of 2.0 feet per second cannot be
met, an explanation and justification shall be included in the Final Wastewater Utility Report.
The maximum velocity shall not exceed 10 feet per second.
Drop manholes shall be provided to break steep slopes to limit the velocities in conformance
with this criterion. Where drop manholes are impractical for velocity reduction, the sewer must
be approved by variance and shall be of PVC or other abrasion resistant material approved by the
City.
Where actual flow will be much below normal for several years, the minimum velocity shall be
achieved by suitable grades at the initial design flow rate. Care shall be taken to design invert
elevations at manholes in such a manner that the energy gradient is consistently falling in the
direction of the flow.
Sanitary sewers shall be sized to convey the peak design flow in accordance with the following
table:
Pipe Diameter
(inches)
Maximum Depth of Flow/Pipe
Diameter
< 15
0.5
>15
0.75
Computation of velocity of flow shall be based on a coefficient of roughness "n" in the Manning
formula as follows: n = 0.013 (min).
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Chapter 4. Wastewater Collection System Design Criteria
At all junctions where a smaller diameter main discharges in to a larger one, the crowns (obverts)
of the two pipes shall have matching elevations. No surcharging of sanitary sewer lines is
allowed.
4.4.3 Pipe Sizes and Grades
Sanitary sewer shall be a minimum of 8 inches in diameter. Service lines shall be a minimum of
4 inches in diameter.
The minimum sewer slopes shall comply with the slopes included in Table R317-3-2.3(D)(4) of
the Utah Administrative Code.
4.4.4 Selection of Pipe Material
Gravity sewers in the City collection system shall be constructed of PVC, or fiber -glass
reinforced polymer mortar, unless special conditions require another material. Force mains shall
be PVC or HDPE. Other pipe materials must be approved by the City prior to use. If concrete is
to be used, the collection system must be evaluated for sulfide corrosion risk and corrosion
mitigation measures must be implemented as needed. Sewers at stream crossings or crossings
with water lines shall be ductile iron in accordance with {R317 U.A.C.}. Materials for building
sewers (between structures and the City collection main) shall be in accordance with plumbing
code.
4.4.5 General Wastewater System Layout Criteria
4.4.5.1 Location
All sanitary sewers and appurtenances shall be installed in dedicated rights -of -way or dedicated
utility easements. Sewers or manholes shall not be installed parallel to, and directly below, any
concrete such as sidewalks, trails, curbs, or gutters. In general, sanitary sewers shall be located in
public streets near the center of the south or west lane. Sanitary sewers and manholes shall not
be located in vehicle wheel paths. A sewer shall not be closer than 5 feet to a gutter. Sanitary
sewer lines and manholes shall not be located within detention pond areas.
Where it is necessary to locate a sanitary sewer main along back lot lines, the alignment shall be
specifically approved by the City. Manholes installed along lot lines shall be provided locking -
type covers.
4.4.5.2 Horizontal Layout
Sewers shall be laid with a minimum separation of 10 feet horizontally, edge -to -edge, from all
water lines. Sewers shall have a minimum separation of 10 feet horizontally, centerline -to -
centerline, from all other existing or proposed utilities wherever possible. The City of Moab
must specifically approve any variance from these requirements in the event that it has been
determined that it is impossible to maintain the specified horizontal separation distances.
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Sewers adjacent to developments shall be designed to extend along the entire frontage of the
property to be served, from property line to property line, with termination in a manhole. This
provides for wastewater service for adjacent Developers or Builders in the future. Within
developments, sanitary sewers shall be extended at least ten feet horizontally uphill from the
lowest lot corner of the uppermost lot, and shall terminate in a manhole.
4.4.5.3 Vertical Layout
Sanitary sewers shall have a minimum cover of 5 feet to finished ground surface, and a
maximum cover of 20 feet unless otherwise approved by variance. Sanitary sewers shall be deep
enough to collect wastewater from all basements by gravity flow. When less than 9 feet of
elevation difference exists between the finished lot grade at the building line and the top of the
sanitary sewer main, such conditions shall be clearly addressed in the required Utility Reports,
with notes provided on the record drawings indicating which lots are served by a "shallow
sanitary sewer." Appropriate elevation information shall be provided on the record drawings for
all such mains. For sewers that receive or will receive flow from offsite, the minimum depth to
the sewer is 9 feet, unless otherwise approved by the City.
4.4.5.4 Sanitary Sewer Main Crossing a Water Main
When it is necessary for sewers to cross public water system pipes, the crossings shall be in
accordance with the State of Utah requirements. These requirements are located at {R309-550-7
U.A.C.} and {R317-3-2.9(B)(1) U.A.C}.
4.4.5.5 Sanitary Sewer Main Crossing of a Storm Drain
When sanitary sewers or force mains cross a storm drain, regardless of vertical clearance and
which pipe crosses over the other, each joint of the storm sewer within the trench width of the
crossing shall be encased in a concrete collar at least 6 inches thick and extending at least 6
inches each side of each joint.
4.4.5.6 Limits on Minimum Vertical Clearance
Under no circumstances shall the minimum vertical clearance between any two crossing utilities
be less than 12 inches unless approved by the City.
4.4.6 Bored Crossings
When a sewer passes under a State roadway, an arterial or collector roadway as defined by the
City, railroad, drainage or irrigation ditch, the sewer shall be located within bored steel casing
pipe, unless otherwise allowed to be open cut by the jurisdictional entity being crossed. The
carrier pipe shall be supported by casing spacers. The casing shall be sealed around the sewer at
the casing ends. The casing shall have a minimum of 5 feet of cover. The casing pipe shall
extend the entire width of the right-of-way or easement of the crossing structure, or as directed
by the City or other jurisdictional entity.
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Crossing at ditches shall include cutoff walls at each side of the crossing, either as required by
the jurisdictional entity, or as analyzed and designed by the Engineer at the direction of the
Engineering Department.
Casing pipe shall be smooth -walled, non -coated pipe of welded steel construction conforming to
ANSFAWWA C200, and shall be seamless or straight seam steel pipe with minimum yield
strength of 35,000 psi. The casing pipe shall be new material and have a minimum wall thickness
as follows unless specified otherwise.
Carrier Pipe Nominal
Min. Casing
Pipe O.D.
Min. Wall Thickness*
Diameter
4"
12"
0.250"
6"
14"
0.3125"
8"
16"
0.3125"
12"
20"
0.3750"
*The boring contractor shall
needed. Other pipe sizes
submitted to the City of Moab
determine and
provide a greater wall thickness if
by a professional engineer and
shall be designed
for review.
The Engineer shall evaluate the risk of corrosion to the casing based on the corrosively of the
surrounding soils, as well as any known risks from nearby stray current, buried electrical lines,
nearby impressed current corrosion protection systems or other factors. For each casing
installed, the Engineer shall provide a written evaluation as to whether corrosion protection is
needed. If needed, the Engineer shall provide a design for corrosion protection. The City
preference is for sacrificial anodes systems rather than impressed current systems. The design
shall be submitted to the City for review. Long-term maintenance of the system, including anode
assessment and replacement, shall be addressed in the evaluation.
4.4.7 Manholes
4.4.7.1 Layout
1. Location: Manholes for access to sewers shall be provided at the following locations:
a. All junctions of sanitary sewers.
b. All points of change in alignment, grade or pipe size.
c. All points of industrial and commercial discharge to facilitate observation and
sampling.
d. The upstream terminus of the main.
e. Cleanouts shall not be allowed to replace manholes on sanitary sewer lines 8
inch and larger.
2. Alignment and Spacing: Sewer manholes shall be aligned and spaced as follows:
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Chapter 4. Wastewater Collection System Design Criteria
a. Sewers shall be installed in a straight alignment, both in line and grade, and not
curved between manholes.
b. Maximum spacing between manholes shall be 400 feet for lines 15 inches or
smaller and 500 feet for lines 18 inches and larger.
c. Maximum change in alignment shall not exceed 90 degrees.
d. Manhole lids shall not be aligned with vehicle wheel paths, or within 2 feet
either direction of the street crown.
e. No drop -in style riser or paver rings are allowed. Grade rings beneath the ring
and cover are allowable for final grade adjustment with a maximum of 12 inches.
3. Access: Provisions for manhole access shall be as follows:
a. Manholes shall not be located in areas that are subject to flooding from surface
runoff. If the possibility of surface runoff flooding cannot be avoided, a watertight
lid as approved by the City shall be installed to prevent inflow.
b. Manholes shall be located in areas that allow direct access by maintenance
vehicles when it is not feasible to locate the manhole in a public street.
c. Manholes shall not be located in open space access roads, wherever possible. If
it is impossible to locate a manhole outside an access road, then the cover shall be
at the grade of the access road and a 10' x 10' concrete collar shall be installed
around the manhole. All manholes located outside dedicated street right-of-way
shall be designed and constructed with a locking -type cover and the manhole ring
shall be bolted to the manhole cone and the manhole lid shall be raised in
accordance with the City's Standard Detail. Marker shall be installed to mark the
location of manholes outside of pavement.
d. All manhole lids shall be depressed'/4" to'/2" below any adjacent finished street
surface.
4.4.7.2 Manhole Sizing
Manholes for sanitary sewers up to 18 inches in diameter shall have an inside diameter not less
than 4-feet. Manholes for sanitary sewers 18 inches to 36 inches shall have an inside diameter of
not less than 5-feet. Manholes for sanitary sewers 36 inches to 54 inches shall have an inside
diameter of 6 feet. Manholes for sanitary sewers over 54 inches shall be of special design. If the
angle of deflection does not permit use of a 6 foot inside diameter manhole, then a special
manhole detail must be submitted for review and approval by the City. There shall be a bench
located below the bottom manhole ladder rung.
4.4.7.3 Drop Manholes
1. Drop manholes shall be in accordance with the City's standard details.
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4.4.7.4 main Connections to Existing Manholes
No new connection shall be made with existing manholes. When connections are required at the
location of an existing manhole, the manhole shall be replaced unless otherwise approved by the
City.
4.4.7.5 Sanitary Sewers and Manholes Greater than 20 Feet
Where sanitary sewers or manholes cannot be designed at depths less than 20 feet, a variance
shall be obtained.
4.4.8 Inverted Wastewater Siphons
The design of inverted wastewater siphons, or sag pipes, shall be avoided, unless approved by
the City. When inverted siphon construction is deemed necessary and approved by the City, the
facility shall have at least two separate barrels with a minimum pipe size of 8 inches, and shall
include appurtenances for convenient flushing and maintenance. Inlet and outlet structures shall
have adequate clearance for access and maintenance operations, and sufficient head shall be
provided and pipes sized to ensure velocities of at least 3.0 feet per second under average flow
for both initial and future build -out conditions. The inlet and outlet shall be arranged so that
normal flows can be diverted to one barrel, and that either barrel may be removed from service
for cleaning or repair.
4.4.9 Fill Areas
Where sanitary sewer lines will be constructed in fill areas, all fill materials shall be placed and
compacted to final grade prior to the installation of the sanitary sewer line and appurtenances.
4.4.10 Future Connections
Manholes shall have pipes stubbed out that are sized to accommodate flows from the upstream
basin whenever a future extension of the sanitary sewer main is anticipated. The main line stub -
out shall be capped and sealed.
4.4.11 Sanitary Sewer Service Lines
All single family residential dwellings, each individual unit in multi -family complexes, and each
commercial business and industrial customer shall be served by a separate, independent sanitary
sewer service line. The City Engineer may approve the use of a single service line for multi-
family residences.
4.4.12.1 Ownership
After a building is connected through a service line to the sanitary sewer, the service shall
become a part of the building, and the Owner of the premises shall be responsible for the
operation and maintenance of the entire service line (building sewer) between the building and
the City sewer, excluding the wye at the connection. Although the service line up to the wye is
the responsibility of the Owner, the service lines and associated connections to the main shall be
inspected and tested by the City prior to backfill. The inspection of service line stub -outs will
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take place at the same time inspections are conducted for the installation of the sanitary sewer
main. Inspection of the entire service line will be made when the service line is extended to the
building.
4.4.12.2 Layout
The Owner shall install a service line stub -out from the sanitary sewer main to each individual
lot. Where sidewalks are proposed to be constructed, the stub -out shall be constructed to 15 feet
beyond the back of the sidewalk. Where sidewalks will not be constructed, the stub -out shall be
constructed a minimum of one foot beyond the property line. The stub -outs shall be plugged and
the end marked with a green painted T-post installed in the ground directly above the location of
the plugged end.
4.4.12.3 Cleanouts
Cleanouts shall be required on wastewater service lines in accordance with the City standard
details and in accordance with plumbing code.
4.4.12.4 Structural Requirements
A. Under Roads - All structures and pipe placed under public roads shall be of sufficient
strength to support, with an adequate factor of safety, the backfill, road surfacing and H-
20 traffic load per AASHTO Standard Specifications.
B. Steep Grades - Concrete anchors shall be provided for sewers on slopes of 20% or
greater, or where wastewater velocities exceed 15 feet/second. The purpose of the
anchors is to secure the sewer against lateral or axial displacement.
4.5 Easements
Where sewers cannot be installed in right-of-way, they shall be located within utility easements
approved by the City and shall be centered in the easement. All utility easements shall have a
minimum width of at least two times the depth to the pipe invert. The minimum easement width
shall be 20 feet for one utility, 30 feet for two utilities, and 40 feet in width for three utilities.
Site -specific circumstances may dictate the need for wider easements. Utility easements and
dedicated utility tracts shall be defined by bearings and distances around the perimeter of the
easement. Centerline legal descriptions are not acceptable.
All utility easements shall be for the exclusive use of the City. No permanent structures, (e.g.,
retaining walls, trees, light pedestals, sign foundations, power poles, mailboxes, sheds, buildings,
etc.), shall be placed in the easement.
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Chapter 4. Wastewater Collection System Design Criteria
4.6 Sand/Oil and Grease Interceptors
Sand/oil and grease interceptors shall be installed on service lines from commercial and
industrial properties discharging oil and grease. The owner shall prepare sizing calculations for
the interceptor for City review. At the City's option, the City will size the interceptor. The
interceptors shall include a sampling port which extends into a manhole or other City approved
structure which causes the discharged fluid to drop vertically at least 3-inches so that a samples
may be collected. The connection must be in a location accessible by City inspectors so that
samples can be collected.
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Chapter 5. Sewage Pump Station (Lift Station) and Force Main Criteria
5.1 Sewage Pump Stations (Lift Stations) and Force Mains
5.1.1 Scope
New lift stations are discouraged and shall only be allowed in those locations where there is no
feasible way the development can be served by gravity extension of the City's existing
wastewater collection system.
5.1.2 Compliance with State of Utah Standards
Lift stations shall be designed in accordance with the State of Utah standards, currently located at
{R317-3-3 U.A.C}. Lift stations shall also be design in accordance within the applicable
building codes.
5.1.3 City Review and Approval
New lift stations must be approved by the City. If approved, the Developer shall submit a utility
report with a complete set of design calculations and drawings for review and acceptance by the
City.
5.1.4 Flood Protection
Lift station structures and the associated electrical and mechanical equipment shall be protected
from damage by the 100-year flood, and shall remain fully operational and accessible during
such an event. Local, State and Federal regulations pertaining to floodplain shall be satisfactorily
accounted for in the design. Grading shall be provided to protect the site by directing surface
flows away from the facilities.
5.1.5 Accessibility and Security
Lift stations shall be readily accessible by maintenance vehicles during all weather conditions.
The facility should be located off the traffic way of streets and alleys. Depending on the nature
and location of the facility, security fencing with controlled entry keypads, card -reader access to
buildings, security cameras, lockable access hatches, and motion -detection safety lighting may
be required.
5.1.6 Grit
Where it is necessary to pump wastewater prior to grit removal, the design of the wet well and
lift station piping shall receive special consideration to avoid operational problems from the
accumulation of grit.
5.1.7 Station Ventilation
Adequate ventilation at lift stations shall be provided to mechanically ventilate the dry well, and
if screens or mechanical equipment requiring maintenance or inspection are located in the wet
well, it shall also be mechanically ventilated. There shall be no inter -connection between the wet
well and dry well ventilating systems. In pits over 15 feet deep, multiple inlets and outlets are
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Chapter 5. Sewage Pump Station (Lift Station) and Force Main Criteria
required. Switches for the operation of ventilation equipment should be clearly marked and
conveniently located. Consideration should be given to automatic controls where operations may
be intermittent.
Where excessive moisture or low temperatures are a concern, consideration shall be given to
installation of heating and/or dehumidification equipment.
5.1.8 Odor Control
Unacceptable levels of odors may be produced at lift stations and within force mains due to
excessive hydrogen sulfide generation. Odor control systems are required.
5.2 Minimum Lift Station Design Criteria
The following design criteria shall be applicable to lift stations:
1. Lift stations must be equipped with instrumentation and SCADA equipment to collect
and transmit all relevant data.
2. Backup electrical power provided by a diesel or natural gas generator with an
automatic transfer switch in an all-weather enclosure shall be provided to insure that all
lift station components function properly for a period of at least one week in the event
that the primary power is lost. Electrical power to the lift station site shall be
underground. In addition, an emergency overflow basin shall be provided that will
accommodate a minimum 12 hours of storage at the peak daily loading rates. The basin
shall be designed and configured to allow for complete draining after an overflow event,
either by gravity or submersible sump pumps permanently installed in the basin.
3. Lift stations shall include a wet well sized to reduce the cycling of the pumps and the
settling of solids from the flows.
4. A corrosion protection system shall be applied to, and shall completely cover all
interior surfaces of wet wells, and any in -line vaults or manholes that precede the wet
well. The system shall be specifically designed to protect concrete from hydrogen sulfide
corrosion.
5. All lift station wet wells shall be considered an explosion hazard. All electrical
equipment and wiring installed therein shall be designed for this hazard.
6. Installation of suitable devices for measuring, recording and totalizing sewage influent
and effluent flow and power consumption shall be included.
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Chapter 5. Sewage Pump Station (Lift Station) and Force Main Criteria
7. The lift station design shall consider changes in flows over the life of the station and
allow for proper operation of the station and force main throughout the intended design
life.
8. Where high groundwater conditions are possible, buoyancy of the lift station structures
shall be evaluated and protected against flotation.
9. The lift station shall include a wet well bypass -to -overflow basin to allow the wet well
to be temporarily removed from service for maintenance.
5.3 Pump Equipment and Protection
Pumping equipment shall be specifically designed and rated for wastewater service. For
wastewater lift stations with an ultimate rated capacity of 1 MGD or less, the City will consider
the use of either self -priming pumps in a wet well, or self -priming pumps in a wet well / dry well
configuration. For stations with an ultimate capacity in excess of 1 MGD, only a wet well self -
priming configuration with the pump located above the wet well and above ground will be
accepted.
5.3.1 Pump Characteristics
1. Pumps shall be specifically designed and rated for wastewater service.
2. The design Engineer shall consider pump efficiency in the design with the intent to
maximize pumping efficiency and minimize electrical power demand.
3. Wastewater level measurement equipment shall be provided and shall be connected
with the City SCADA system.
3. The lift station shall be provided with multiple pump units programmed to alternate
sequentially. Should only two units be provided, equal capacity is required, and each
pump train shall be capable of handling the peak flow. Pump redundancy is required so
that pumps may be taken out of service for maintenance.
4. The station shall be designed such that the number of motor starts per hour shall not
exceed 10, or the number of starts recommended by the motor manufacturer, whichever
is less. Duplex pump operation and controllers shall be provided such that the lead and
lag pump positions are alternated with each successive motor start.
5. Provisions acceptable to the City shall be made to facilitate the removal of pumps,
motors, and other mechanical and electrical equipment. Typically, in wet well / dry well
stations, a bridge crane shall be provided for removing pumps. In suction lift stations,
slide or overhead rails with hoists for removing pumps shall be provided. In wet well
stations, rails shall be provided.
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Chapter 5. Sewage Pump Station (Lift Station) and Force Main Criteria
5.3.2 Pump Protection
Pumps handling raw wastewater shall be preceded by approved grinders that are installed to
protect the pumps from clogging damage by reducing the particle size of wastewater solids in the
flow stream. The grinder shall be located in a lined vault or manhole that precedes the wet well.
Grinder pumps may be used in wet well settings for flows less than 1 MGD.
5.4 Overflow Basins
Overflow basins for lift stations shall be sized to contain the volume of 12 hours the Average
Daily Flow at build -out. The basin shall be designed and configured to allow for complete
draining after an overflow event, either by gravity or submersible sump pumps permanently
installed in the basin. Basins shall be designed to include a vault or manhole outside the overflow
basin to facilitate the complete removal of any liquid that accumulates in the basin, and shall
require the installation of a pipe between the basin and vault, with positive slope to the vault. A
pump -back or gravity system shall be included in the lift station design to return wastewater to
the wet well.
5.5 Force Main Design Criteria
5.5.1 Pipe Materials
Force main pipe materials, including restraint devices and fittings, shall be PVC or HDPE. Use
of other materials must be approved by the City.
5.5.2 Velocity and Pipe Diameter
Sanitary sewer force mains shall be a minimum of 3 inches in diameter. At the design pumping
rate (initial and ultimate), the velocity shall be at least 3 feet/second, but not more than 7
feet/second.
5.5.3 Pipe and Design Pressure
The force main, joint restraint, thrust blocking, and station piping shall be analyzed and designed
to withstand water hammer pressures and associated cyclic reversal stresses that are expected
with the cycling of wastewater lift station pumps. Water hammer shall be evaluated for the
normal operation of the lift station, as well as for a power outage while the pumps are running.
5.5.4 Shutoff and Check Valves
Suitable shutoff and check valves shall be placed on the discharge line of each pump. Check
valves shall be suitable for the material being handled and shall be placed on the horizontal
portion of discharge piping except for ball checks, which may be placed in the vertical run.
Valves shall be capable of withstanding operational design pressures and water hammer
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Chapter 5. Sewage Pump Station (Lift Station) and Force Main Criteria
5.5.5 Isolation vaives
Isolation valves shall be installed at intervals no greater than 1,000 feet along force mains.
5.5.6 Combination Air Release and Air/Vacuum Valves
Combination air release and air/vacuum valves shall be located at force main high points, on
pump discharge piping as close as possible to the check valve, and between isolation valves.
During the design, the Engineer shall consider the economics of air valve installation against the
installation of deeper force main piping. The evaluation shall take into account the installation
and long-term maintenance costs of the air valves. The valves shall be specifically designed for
wastewater service and be sized per the manufacturer's recommendations. Air valves on force
mains shall be contained in a vault and vented above ground. A manually controlled isolation
valve suitable for wastewater service shall be installed between the force main and air valve.
5.5.7 Drain Valves
When required by the City, the Engineer shall include at least one force main dewatering
connection at the lift station and additional drains at other major force main low points. The
design shall consist of as few low points along the force main as is practically possible. Drains
shall generally include a plug valve installed on a tee and drain piping to an existing sanitary
sewer manhole, or to a separate manhole that can then be pumped by City personnel. Provisions
shall be made to drain the force main back to the wet well.
5.5.8 Cleanouts
Cleanouts shall be provided in the force main at distances not to exceed 500 feet.
5.5.9 Termination
Force mains shall transition into the gravity wastewater system at a dedicated manhole. The
connection of the force main to the manhole shall be made by connecting the force main to a
short section of gravity main stubbed out from the manhole. The gravity stub shall be a size that
is equal to or larger diameter pipe than the force main, and shall be installed at an elevation that
will prevent wastewater from discharging back into the force main when the gravity system is
flowing full. The manhole interior shall be coated for protection against hydrogen sulfide
corrosion. The manhole and its opening shall be oversized to permit retrieval of cleaning pigs
and ancillary equipment. The manhole at the discharge point shall not be an in -line gravity
manhole.
5.5.10 Identification
Minimum identification requirements for force mains shall consist of tracer wire and warning
tape as required for potable water mains, and green marked polywrap for ductile iron pipe. The
warning tape shall be labeled, "Caution: Buried Force Main Below".
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WATER SYSTEM DESIGN
CRITERIA MANUAL
Effective Date: August 1, 2017
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Table of Contents
Contents
1.1 Introduction 1
1.2 Jurisdiction 1
1.3 Purpose 1
1.4 Amendments and Revisions 1
1.5 Enforcement Responsibility 2
1.6 Review and Acceptance 2
1.7 Interpretation 2
1.8 Relationship to Other Standards 3
1.8.1 State Public Water System Code and Rules 3
1.8.2 State Construction Code 3
1.8.3 NSF International Standards 3
1.9 Variances from these Criteria 3
1.10 Adoption of the Utah American Public Works Association (APWA) Standard Plans and Specifications
3
1.11 Acronyms 3
1.12 Definitions of Terms 4
2.1 Introduction 7
2.2 Planning Policy 7
2.3 Design Policy 7
2.4 Construction of Public Improvements Policy 7
2.5 Ownership of Public Improvements Policy 8
2.6 Operations and Maintenance Policy 8
2.7 Hazard Minimization and Public Safety Policy 8
2.8 Duty of the Professional Engineer Preparing Development Documents 9
3.1 Introduction 10
3.2 Review Process 10
3.2.1 Pre -Application Consultation 10
3.2.2 Water Utility Report Requirements 10
3.2.2.1 Format 10
3.2.2.2 Stand -Alone Document 10
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Table of Contents
3.2.2.3 Submittal Adequacy 11
3.2.3 Review by Referral Agencies 11
3.3 Acceptance 11
3.3.1 Final Utility Report Required for Construction 11
3.3.2 Approval Limitation for Final Utility Report 11
3.4 Preliminary Water Utility Report 11
3.4.1 Water System Modeling 14
3.5. Engineering Department Responsibility 14
3.6 Final Water Utility Report 14
3.6.1 Disclaimer 17
3.7 Construction Drawings 18
3.7.1 Water System Improvements 18
3.7.2 Indemnification Statement 18
3.7.3 Construction Drawing Requirements 18
3.7.3.1 Water Utility Construction Drawings 18
3.8 Record Drawings 20
4.1 Reference Design Documents 21
4.2 Prohibited Installations 21
4.3 Unlawful Connections 21
4.4 Minimum Water System Design Criteria 22
4.4.1. Design Demands 22
4.4.1.1 Fire Flows 22
4.4.2 Storage Requirements 22
4.4.3 Minimum Hydraulic Performance Criteria 22
4.4.3.1 Operating Pressures and Pressure Zone Characteristics 23
4.4.3.2 Location of Pressure Reducing Valves 23
4.4.4 Minimum Distribution Main Sizing and Valve Spacing 23
4.4.5 General Water System Layout Criteria 23
4.4.5.1 Location 23
4.4.5.2 Horizontal Layout 23
4.4.5.3 Vertical Layout 24
4.4.6 Pipe Joint Deflection 24
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Table of Contents
4.4.7 Distribution Main Looping 24
4.4.8 Transmission Mains 25
4.4.9 Bored Crossings 25
4.4.10 Appurtenances 26
4.4.10.1 Valves 26
4.4.10.2 Pressure Reducing Valves 27
4.4.10.3 Fire Hydrants 27
4.4.10.4 Thrust Restraint 28
4.4.10.5 Meters and Service Connections 28
4.4.10.6 Fire Protection Service Lines 29
4.4.10.7 Manholes 29
4.4.10.8 Backflow Prevention Assemblies 29
4.4.10.9 Combination Air Release and Vacuum Valves 30
4.4.10.10 Blow -off Pumping Manholes 30
4.4.10.11 Tracer Wire and Warning Tape 30
4.4.11 Fill Areas 30
4.4.12 Trail Access 30
4.4.13 Main -Break Swale Design 31
4.4.14 Future Connections 31
4.4.15 Water Service Lines 31
4.4.15.1 Layout 31
4.5 Easements 32
4.6 Testing and Disinfection 32
5.1 General 33
5.1.1 Scope 33
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Chapter 1. General Provisions
1.1 Introduction
These criteria and design standards together with all future amendments shall be known as the
City of Moab Water System Design Criteria Manual (hereafter called "Criteria"). All utility
reports and plans, analyses, and designs, submitted as a requirement of the City of Moab
(hereafter called "City") ordinances and resolutions (hereafter called "Regulations"), shall
comply with these Criteria.
1.2 Jurisdiction
These Criteria shall apply to all land within the incorporated area of the City of Moab, or served
by the City, including any public lands. These Criteria shall apply to all systems and facilities
constructed in or on City Rights -of -Way, easements dedicated for utilities across public or
private property, easements for public use, and to all privately owned and maintained system
facilities.
1.3 Purpose
Presented in these Criteria are the policies and minimum technical criteria for the planning,
design and construction of drinking water systems within the boundaries of the City of Moab and
areas served by the City. All subdivisions, site plans, or any other proposed development
submitted for acceptance by the City shall include adequate and appropriate water system
planning, analysis, and design. Such planning, analysis, and design shall conform to or exceed
the Criteria set forth herein. Water system planning, analysis, and design that require policies and
technical expertise not specifically addressed in these Criteria shall follow the requirements
outlined in the Utah Code Annotated, Utah Administrative Code (see {R309 U.A.C.}), industry
standards and manufacturer's recommendations. In the event of a conflict, the State of Utah
Codes and Administrative Rules will prevail. Interpretation will be provided by the City of
Moab and/or the Utah Department of Environmental Quality, Division of Drinking Water.
1.4 Amendments and Revisions
Policies and criteria may be amended as new technology is developed or if experience gained in
the use of these Criteria indicates a need for revision. All technical criteria and policy changes
must be recommended by the City Engineer or Public Works Director. Minor revisions will
require the approval of the City. All major revisions will require adoption, by resolution or
ordinance of the City Council. The City Engineer may approve minor revisions and technical
changes.
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Chapter 1. General Provisions
TABLE 1-1 EXAMPLES OF MINOR AND MAJOR REVISIONS
MINOR
MAJOR
Grammar
Policy Changes
Submittal Requirements
Clarifications
Construction Detail Revisions
clarification, minor modification
for
Technical Criteria Changes
1.5 Enforcement Responsibility
The Engineering Department and Public Works Department shall review all water system reports,
plans, analyses, and designs submitted as a requirement of the Regulations for compliance with
these Criteria. The Regulations are enforced by the City of Moab and authorized representatives.
1.6 Review and Acceptance
The City shall review all submittals for general compliance with these Criteria. An acceptance
by the City does not relieve the Owner, Engineer, or Designer from the responsibility of
ensuring that the design, calculations, plans, specifications, construction, and record drawings are
in compliance with these Criteria and in compliance with other applicable State and Federal
requirements. The City may refer submittals to other agencies that have an interest or
responsibility for water system issues.
1.7 Interpretation
In the interpretation and application of these Criteria by the City, the provisions herein shall be
regarded as the minimum requirements for the protection of the public health, safety and welfare
of the residents of the City of Moab.
Whenever a provision of these Criteria and any other provision of the Regulations or any
provision in any law, ordinance, resolution, rule or regulation of any kind, contains any
requirement(s) covering any of the same subject matter, the requirements that are more
restrictive or impose higher standards shall govern, as determined by the City.
These Criteria shall not abrogate or annul any binding agreements, Development Improvement
Agreements, easements, permits, utility reports or construction drawings accepted by the City
prior to the effective date of these Criteria.
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Chapter 1. General Provisions
1.8 Relationship to Other Standards
1.8.1 State Public Water System Code and Rules
Public water systems in the State of Utah are governed by the State of Utah Code Annotated and
the Utah Administrative Code. These codes and rules apply to policy, planning, criteria and
construction of public water system and prevail if a conflict exists with the Criteria. Most water
projects require a submittal to the Utah Divison of Drinking Water for its review. For land
development projects, the Developer/Owner shall provide all information needed to complete the
review and pay all review and relataed fees.
1.8.2 State Construction Code
The State of Utah Construction codes and rules, with amendments, are incorporated by reference.
These codes and rules apply to policy, planning, criteria and construction of public water system
and prevail if a conflict exists with the Criteria.
1.8.3 NSF International Standards
All pipe, valves, fittings, and other water system components that contact water within the public
water system shall comply with the applicable standards of NSF International. These include
NSF 60 (Water Treatment Chemicals), NSF 61 Annex G, and NSF 372 (Drinking Water System
Components).
1.9 Variances from these Criteria
Modifications to these Criteria shall require a formal variance request. Variances from the
provisions of these Criteria may be considered on a case -by -case basis for specific
applications only, and shall not establish a precedent for any other project or future
development.
1.10 Adoption of the Utah American Public Works Association (APWA)
Standard Plans and Specifications
The latest Utah APWA Manual of Standard Plans and Manual of Standard Specifications are
hereby adopted as the City of Moab Standard Details and Standard Specifications for water
system improvements. Variance from these standards must be approved by the City. In the event
that multiple standards apply, the City will determine the applicable standard.
1.11 Acronyms
As used in the City's Water Criteria Manual, the following acronyms shall apply:
ANSI American National Standards Institute
APWA American Public Works Association
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Chapter 1.
General Provisions
ARV
ASTM
AWWA
CD and CDs
CFS
DIA
DIP
DIPRA
ERC
HP
Max
Min
NAVD
OSHA
PE
PRV
PSI
PVC
RCP
ROW
Combination Air Release/Vacuum Valve
American Society for Testing and Materials
American Water Works Association
Construction Drawing(s)
Cubic Feet per Second
Development Improvements Agreement
Ductile Iron Pipe
Ductile Iron Pipe Research Association
Equivalent Residential Connections
High Point
Maximum
Minimum
North American Vertical Datum
Occupational Safety and Health Administration
Professional Engineer
Pressure Reducing Valve
Pounds per Square Inch
Polyvinyl Chloride
Reinforced Concrete Pipe
Right -of -Way
1.12 Definitions of Terms
CODE or MUNICIPAL CODE shall mean the City of Moab Municipal Code, as amended.
CONSTRUCTION DRAWING(S) (CD or CDs) shall mean construction drawings prepared by a
Professional Engineer licensed in the State of Utah for the Developer and approved by the City
depicting public and/or private improvements to be constructed for the Project.
ENGINEER shall mean the Professional Engineer retained by the Developer responsible for the
creation and submission of utility reports and construction drawings to the City for approval for
the purpose of one-time construction of facilities.
CRITERIA or DESIGN CRITERIA shall mean the design criteria and requirements
contained herein for water facilities to be constructed in the City.
DETAILS or STANDARD DETAILS shall mean details issued by the City to be used in
Construction Drawings
DEVELOPER shall mean the party or parties desiring to construct public and/or private
improvements within City rights -of -way or easements, securing all required approvals and
permits from the City and other applicable entities, and assuming full and complete
responsibility for the Project.
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Chapter 1. General Provisions
DEVELOPMENT IMPROVEMENT AGREEMENT (DIA) shall mean a formal agreement
between an annexation applicant or Developer and the City that comprehensively addresses
development conditions and obligations.
EASEMENT shall mean the right of the City to use lands owned by another party for the
purposes of maintenance, access, utilities, drainage or other use, as specified in an agreement.
MUNICIPAL CODE — See CODE.
OWNER shall mean the person(s) in title to any portion of the Property, according to the records
of the Grand County Recorder. The use of the singular "Owner" shall refer to all Owners of the
property.
PRIVATE IMPROVEMENTS shall mean those improvements not identified as public
improvements, and which are not generally installed within the City rights -of -way, easements, or
other City -owned lands.
PROFESSIONAL ENGINEER shall mean an individual currently registered with the Utah
Division of Professional and Occupational Licensing as a professional engineer.
PROJECT shall mean the public or private improvements as designated in the approved
construction drawings to be constructed in conformance with these Design Criteria and the City
standard specification and details. The project is inclusive of any and all public or private
improvement projects for or within the City, whether development projects, private utility
projects or capital improvement projects.
PROPERTY shall mean the real property located in the City of Moab.
PUBLIC IMPROVEMENTS shall mean those public facilities including, but not limited to,
pavement, curb and gutter, sidewalk, pedestrian/bike/equestrian paths, storm drain facilities with
related appurtenances, culverts, channels, bridges, water distribution, transmission and storage
facilities with related appurtenances, wastewater collection facilities with related appurtenances,
water purification facilities, pavement markings/ signage/striping, traffic signals and related
appurtenances, and those processes integral to construction of other Public Improvements listed
herein, which upon their completion are to be dedicated to the City for operation and
maintenance by the City and which are installed within the City rights -of -way, easements, or
other City -owned lands.
REGULATIONS shall mean ordinances, resolutions, rules and regulations of the City, including
the Code, and other provisions of all zoning, subdivision and building codes or any other
applicable design criteria adopted by the City, as the same may be amended periodically and
applied uniformly throughout the City.
SHALL mean a mandatory requirement or condition, as approved by the City.
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Chapter 1. General Provisions
STANDARD DETAILS — See DETAILS.
CITY shall mean the City of Moab, Utah
CITY COUNCIL shall mean the Moab City Council.
ENGINEERING DEPARTMENT shall mean the City Engineering Department.
CITY ENGINEER shall mean the City of Moab Engineer or other authorized representative of
the Engineering Department.
VARIANCE REQUEST shall mean a formal request with adequate documentation and
justification for a variance from the standards, provisions, policies or submittal requirements set
forth in these Design Criteria.
WATER MASTER PLAN shall mean the City of Moab Water Distribution and Storage Master
Plan
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Chapter 2. Water System Policies
2.1 Introduction
Provisions for adequate service, water supply, purification, storage, transmission and distribution
are necessary to preserve and promote the general health, welfare, and economic well-being of
the residents of the City of Moab. The City of Moab must provide coordination, review, and
master planning of the system in order that the integration of each component of the system
meets the intent and purpose of the system as a whole.
The development of the City's water system is governed by the policies provided below, as
facilitated through the implementation of the Criteria contained herein.
2.2 Planning Policy
All land developed within the City that is served by the City's public water system shall provide
planning and design for indoor and outdoor water demands. Reports and plans shall be
submitted for all new development and redevelopment within the City jurisdiction. These
reports shall conform to the requirements set forth herein and the provisions otherwise stipulated
by the City during the development process. Redevelopment shall be defined as any land
disturbance or reconstruction that results in a reconfiguration of existing water system facilities
or an increase in demands.
During the initial planning stages of the development, a pre -application meeting shall be
coordinated with the City of Moab Planning Department. One purpose of this meeting is to
assist the City and the developer to determine the level of water service that is available and
needed by the developer.
2.3 Design Policy
Water system planning and design within the City shall adhere to the Criteria contained herein,
the administrative rules promulgated by the Utah Division of Drinking Water, the Utah Division
of Water Rights (for wells and water rights), and acceptance procedures of the City of Moab, any
applicable watershed protections ordinances, drinking water source protections zones and the
applicable water related master plans prepared for the City. Prohibited facilities and connections
shall be as described in these criteria.
2.4 Construction of Public Improvements Policy
The construction of improvements for and within the City shall conform to the City's
construction permit, standard specifications, standard details and approved plans, and shall
adhere to all City, County, State, and Federal regulations applicable to the work. This shall
include the acquisition of all necessary permits, which may include but not be limited to, stream
alteration permits, discharge permits, road cut permits, flood plain related permits and letters
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Chapter 2. Water System Policies
(including FEMA review and approval when applicable), Utah Division of Drinking Water
approvals, traffic control permits and all other required permits and approvals. At the completion
of construction, all permits and service agreements with power companies and any other private
utilities shall be transferred into the Customer's name, and shall under no circumstances be
transferred to, or held in the name of the City, unless the City is the customer. Any work
proposed to take place within existing City of Moab streets must be reviewed and approved by
the City. The type of crossing allowed, traffic control, street repair specifications, etc. shall be as
determined by the City.
Prior to placing the facilities into service and initial acceptance by the City, all construction
related provisions required by the City shall be satisfied, including startup procedures,
inspections and testing of the facilities, and receipt of O&M Manuals and Record Drawings.
Additionally, all requirements and responsibilities of the warranty period will be met.
2.5 Ownership of Public Improvements Policy
The delineation between City -owned and privately owned portions of the system and the
associated maintenance responsibilities for each, shall be as set forth in the latest editions of the
Municipal Code, standard details and previous agreements and policies in effect with the City.
Upon execution of final acceptance, the water mains and all appurtenant City -owned facilities,
shall become the sole property of the City, and full legal and equitable title thereto shall be
vested in the City free and clear of any liens, claims, or rights of any third party in or to the
public improvements.
2.6 Operations and Maintenance Policy
The design of all water system facilities within the City must provide for access and long-term
operation and maintenance of the facilities by the City. Operation and Maintenance manuals
associated with all components to be installed as part of the water system shall be provided to the
City with the Record Drawings required in these Criteria, unless otherwise specifically waived
by the City.
Utility easements, dedicated tracts and access easements shall be provided for all water system
facilities outside of public right-of-way as set forth in these Criteria, or as otherwise required by
the City, and shall be adequate for the operation, maintenance and replacement of the facilities.
2.7 Hazard Minimization and Public Safety Policy
Public safety and the protection of City staff shall be an essential objective when planning,
designing, constructing, operating and maintaining the City's water system facilities. All such
facilities shall be designed with careful consideration of the potential hazards associated with the
use and long-term operation and maintenance of the facility. The design phase of all projects
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shall evaluate the health and safety risks associated with the facilities, and shall include
appropriate design features to minimize these risks and to adequately protect the general public
and City personnel from the hazards. Equipment for confined space entry in accordance with
OSHA and other applicable regulatory agency requirements shall be provided at all City of Moab
facilities, as required. Hatches with fall prevention covers, intermediate platforms, handrails,
safety lighting, etc. shall be as required by the City, or any applicable code.
2.8 Duty of the Professional Engineer Preparing Development
Documents
These standards establish criteria and policies for the design and subsequent construction of the
City's public water system. These standards are not intended to substitute for engineering
knowledge, judgement or experience. It is the responsibility of the design professional engineer
to understand and apply sound engineering principals related to public water systems to the
planning, design and construction of water system improvements. It is also the responsibility of
the design engineer to understand all federal, state and local regulations related to the public
water system.
These criteria should be reviewed by the developer's engineer, who shall evaluate their
applicability. If the design engineer identifies criteria that are inapplicable or inappropriate in a
specific location or specific situation, the development engineer shall bring the issue to the
attention of the City.
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Chapter 3. Water System Submittal Requirements
3.1 Introduction
The requirements presented in this chapter shall be used to aid the Engineer or Applicant in the
preparation of utility reports, modeling evaluations, and construction drawings for water system
facilities. This chapter applies primarily to submittal requirements for water distribution systems
and the associated Criteria provided in Chapter 4. The requirements presented herein are the
minimum necessary, and will be used to evaluate the adequacy of all submittals made to the City.
3.2 Review Process
3.2.1 Pre -Application Consultation
A pre -application consultation with the City of Moab is required for any type of development or
redevelopment. The purpose of this meeting is to discuss general information about the project,
pertinent aspects of the Criteria, the required scope of the utility reports, and any special
procedures, analyses, and submittal requirements that may be applicable.
3.2.2 Water Utility Report Requirements
Preliminary and final water utility reports shall be provided to the City of Moab. The purpose of
the preliminary water utility report is identify existing water infrastructure, provide preliminary
estimates of water demand needs, provide an initial plan for water infrastructure and determine
the feasibility of providing water service to the development via the public water system. The
purpose of the final water utility report, which is to be submitted with the final construction
plans, is to identify the final water infrastructure plan.
3.2.2.1 Format
All required reports shall be prepared on 81/2" x 11" paper (maps and figures may be on larger
paper) and be bound. Supporting drawings, figures, and tables shall be bound into the reports or
included in an attached pocket. Reports shall include a narrative presenting the project for
review in accordance with the information presented in these Criteria, and the requirements
established by the City for the appropriate submittal.
Paper and electronic (PDF) copies of the report shall be provided. Electronic files of computer
models and GIS files shall be provided if requested by the City.
3.2.2.2 Stand -Alone Document
The water utility reports shall be stand-alone documents. When references are made or
assumptions are based on previously submitted reports, the reports must include the appropriate
excerpts, pages, tables, and maps containing the referenced information. Assumptions made in
previous reports must be verified and substantiated in subsequent reports. Reports shall be
legible, or a resubmittal will be required.
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Chapter 3. Water System Submittal Requirements
3.2.2.3 Submittal Adequacy
Any report with incomplete or missing information shall result in the report being returned
without review. The City reserves the right to require additional information beyond that
specifically required in these Criteria.
3.2.3 Review by Referral Agencies
The review and approval of the project by Federal, State and local agencies other than the City,
shall be the responsibility of the Developer. The Developer shall be required to address all
referral agency comments, and to have such comments incorporated into the applicable utility
report and plans submitted to the City.
3.3 Acceptance
3.3.1 Final Utility Report Required for Construction
The final water utility report shall conform to the construction documents to be used to bid the
project, and shall be approved by the City prior to the construction of any water system
improvements.
3.3.2 Approval Limitation for Final Utility Report
The approval of the final water utility report shall expire simultaneously with the expiration of
the approval of the project approval unless extended in conformance with the provisions of the
Municipal Code. At the time the approval of the final utility report expires, the report shall be
deemed invalid and a resubmittal will be required. In order to be re -approved, it must be
demonstrated that the concepts, designs, and calculations presented in the report are consistent
with the City's current Criteria.
3.4 Preliminary Water Utility Report
The Preliminary Water Utility Report shall review and discuss the existing water system
infrastructure and the water needs of the development. The report shall also identify the existing
infrastructure needed to support the development. The City Engineering Department and Public
Works Department will coordinate with the developer to provide needed water system data.
The following outline sets forth the required minimum content to be provided in the Preliminary
Water Utility Report that shall be submitted:
I. TITLE SHEET
A. Name of Project, including legal name of development.
B. Address.
C. Owner.
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Chapter 3. Water System Submittal Requirements
D. Developer.
E. Engineer.
D. Submittal date and revision dates as applicable.
II. TABLE OF CONTENTS
III. PROJECT LOCATION AND DESCRIPTION
A. Site Location.
1. Site Vicinity Map.
2. Township, Range, Section, and 1/4 Section.
3. Streets, Roadways, and Highways adjacent to the proposed development.
4. Names of surrounding or adjacent developments.
B. Description of Property and Land Use.
1. Total area in acres.
2. Discussion of project phasing, if applicable.
3. Total number of ERCs proposed for the development at build -out with a
breakdown of units by type projected by phase (if applicable) calculated
by utilizing the Utah Administrative Code Minimum Sizing Requirements
{R309-510 U.A.C.{.
4. Area (acres) and land use for all parcels to be served within the
development boundaries (initial and future phases, if applicable) and
number of lots if available.
5. Easements/tracts may not be known at this time; however, provide a
statement that easements or tracts necessary for utilities will be provided
at time of either platting or at time of preliminary site plan, in accordance
with City standards regarding location and size of easements and tracts.
6. Major and minor drainage ways and floodplains.
7. Existing irrigation canals or ditches.
8. Significant geologic features and topography.
9. Existing On -Site Wastewater Treatment System (OWTS).
10. Existing Drinking Water Source Projection Zones within the project
boundary.
IV. ESTIMATED DEMANDS
A. Average Daily Demands.
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Chapter 3. Water System Submittal Requirements
Tabulate the Average Daily Demand for the initial and future phases, if
applicable. Average Daily Demand shall be provided in both gallons/minute and
gallons/day. Indoor and outdoor demands should be included.
B. Peak Day Demands
1. Tabulate the Peak Day Demands for the initial and future phases, if
applicable. Peak Day Demands shall be provided in gallons/minute.
2. Fixture count estimates shall be prepared in accordance with the
International Plumbing Code with amendments as adopted.
3. The developer shall evaluate the type of building construction, and
building size and shall recommend a fire flow rate to the City. Final
determination will be made by the City Fire Official. The developer shall
indicate whether fire sprinklers are included in the building plan.
C. Peak Instantaneous Demands
1. Tabulated peak instantaneous demands for the initial and future phases, if
applicable, shall be provided.
V. EXISTING WATER SYSTEM
A. Existing Distribution System.
1. Discuss the existing transmission and distribution lines in the vicinity of
the development, including sizes and locations, which will need to be
extended to serve the proposed development.
2. Discuss any known shortcomings or bottlenecks associated with the
existing distribution system that may impact the City's ability to
adequately deliver fire flows and meet the required demand conditions.
3. Discuss existing pressures at the proposed connection points to the
existing water system.
4. The City will provide information about the existing water system to the
developer in order to discuss the indicated issues.
VI. PROPOSED WATER SYSTEM
A. Proposed Distribution System.
1. Provide a general overview of the anticipated distribution system for the
development, including the proposed line sizes. Describe the tie-ins to the
existing water system and the sizes and lengths of any extensions
necessary to serve the development.
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2. Discuss looping as required by the City, particularly as it pertains to each
successive phase of development anticipated for the project.
B. Proposed Supply Facilities
1. Discuss any pump stations, wells, PRVs, storage reservoirs, purification
facilities, etc., that will likely be required to adequately serve the
development. This shall be done in coordination with the City.
VII. POTENTIAL PERMITTING REQUIREMENTS
General discussion of all foreseeable Federal, State, County, and Local permitting
requirements associated with the project.
VIII. REFERENCES
Reference all criteria, master plans, reports, or other technical information utilized in the
report.
3.4.1 Water System Modeling
The City maintains a water system model. Once the preliminary water system report is received
and found to be adequate, the City will determine whether water system modeling is required. If
the modeling is required, the City will determine the level of modeling needed for the
development and the cost of the modeling. The developer will be responsible for the cost of
water system modeling.
3.5. Engineering Department Responsibility
If the Engineering Department determines that the Preliminary Water Utility Report meets the
requirements set forth in these Criteria and adequate water rights are conveyed to the City, the
City will provide water at the designated tie-in points at available pressures. The City is not
responsible or liable for assumptions made by the Developer regarding utility information
associated with the proposed development.
3.6 Final Water Utility Report
The Final Water Utility Report shall describe all final water infrastructure, including finalized
modeling and calculations.
The following outline sets forth the required minimum content to be provided in the Final
Water Utility Report that shall be submitted with the Construction Documents:
I. TITLE SHEET
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Chapter 3. Water System Submittal Requirements
A. Name of Project, including legal name of Development.
B. Address.
C. Owner.
D. Developer.
E. Engineer.
F. Submittal date and revision dates as applicable.
II. TABLE OF CONTENTS
III. PROJECT LOCATION AND DESCRIPTION
A. Site Location.
1. Site Vicinity Map.
2. Township, Range, Section, and 1/4 Section.
3. Streets, Roadways, and Highways adjacent to the proposed development.
4. Names of surrounding or adjacent developments.
B. Description of Property and Land Use.
1. Total area in acres.
2. Discussion of project phasing, if applicable.
3. Total number of ERCs proposed for the development at build -out with a
breakdown of units by type projected by phase (if applicable) calculated
by utilizing the Utah Administrative Code Minimum Sizing Requirements
{R309-510 U.A.C.{.
4. Area (acres), land use for all parcels to be served within the development
boundaries (initial and future phases, if applicable) and number of lots.
5. Summary of irrigated area, including open space and park areas (initial
and future phases, if applicable).
6. Sizes of schools, commercial and industrial buildings (initial and future
phases, if applicable).
7. Major and minor drainage ways and floodplains.
8. Existing irrigation canals or ditches.
9. Significant geologic features and topography.
10. Existing On -Site Wastewater Treatment Systems.
11. Existing Drinking Water Source Projection Zones within the project
boundary.
IV. CALCULATED DEMANDS
A. Average Daily Demands.
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Chapter 3. Water System Submittal Requirements
1. Tabulate the Average Daily Demand for the initial and future phases, if
applicable. Average Daily Demand shall be provided in both
gallons/minute and gallons/day. Indoor and outdoor demands should be
included.
B. Peak Day Demands.
1. Tabulate the Peak Day Demands for the initial and future phases, if
applicable. Peak Day Demands shall be provided in gallons/minute.
2. Fixture count estimates shall be prepared in accordance with the adopted
plumbing code.
3. The developer shall evaluate the type of building construction, and
building size and shall recommend a fire flow rate to the City. Final
determination will be made by the City Fire Official. The developer shall
indicate whether fire sprinklers are included in the building plan.
C. Peak Instantaneous Demands
1. Tabulated peak instantaneous demands for the initial and future phases, if
applicable, shall be provided.
V. EXISTING WATER SYSTEM
A. Existing Distribution System.
1. Discuss the existing transmission and distribution lines in the vicinity of
the development, including sizes and locations, which will need to be
extended to serve the proposed development.
2. Discuss any known shortcomings or bottlenecks associated with the
existing distribution system that may impact the City's ability to
adequately deliver fire flows and meet the required demand conditions.
3. Discuss existing pressures at the proposed connection points to the
existing water system.
4. The City will provide information about the existing water system to the
developer in order to discuss the indicated issues.
VI. PROPOSED WATER SYSTEM
A. Proposed Distribution System.
1. Provide a general overview of the anticipated distribution system for the
development, including the proposed line sizes. Describe the tie-ins to the
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Chapter 3. Water System Submittal Requirements
existing water system and the sizes and lengths of any extensions
necessary to serve the development.
2. Discuss looping as required by the Engineering Department, particularly
as it pertains to each successive phase of development anticipated for the
project.
B. Proposed Supply Facilities
1. Discuss any pump stations, wells, PRVs, storage reservoirs, purification
facilities, etc., that will likely be required to adequately serve the
development. This shall be done in coordination with the City.
VIII. PROPOSED WATER SYSTEM ANALYSIS AND MODELING
A. Hydraulic Models.
1. The results of the final hydraulic modeling shall be described. The results of the
hydraulic modeling shall be attached to the final water utility report.
IX. POTENTIAL DEVELOPMENT AGREEMENT ITEMS
Discuss any potential development agreement items such as needed off -site
improvements, improvements necessary for a project or project phase to be independently
sustainable, water facilities land dedication requirements, etc.
X. POTENTIAL PERMITTING REQUIREMENTS
General discussion of all foreseeable Federal, State, County, and Local permitting
requirements associated with the project.
XI. REFERENCES
Reference all criteria, master plans, reports, or other technical information utilized in the
report.
3.6.1 Disclaimer
The City is not responsible or liable for assumptions made by the Developer regarding utility
information associated with the proposed development.
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Chapter 3. Water System Submittal Requirements
3.7 Construction Drawings
3.7.1 Water System Improvements
Water system Improvements within public rights -of -way or utility easements are required to be
designed, approved, and constructed in accordance with the City's criteria, subdivision
requirements of the Municipal Code, the City's standard specifications and details, sound
engineering principles, and the conditions of any variances obtained from the City.
3.7.2 Indemnification Statement
Construction drawings are reviewed by the City for concept only. The review does not imply
responsibility by the City of Moab for accuracy and correctness of calculations. Furthermore,
the review does not imply that quantities of items on the plans are the final quantities required.
The review shall not be construed for any reason as acceptance of financial responsibility by the
City for additional quantities of items shown that may be required during the construction phase.
3.7.3 Construction Drawing Requirements
In general, construction drawings shall include plan and profile drawings that convey the
horizontal and vertical alignment of the improvements, and all other pertinent plans, sections and
detailing necessary to construct the proposed facilities.
All construction drawings submitted to the City for review, comment, and approval of water
system improvements shall be prepared by, or under the direct supervision of a Professional
Engineer licensed in the State of Utah. Said Professional Engineer shall be responsible for the
information contained on the construction drawings, which shall bear the Professional Engineer's
seal prior to final approval for construction.
The Developer, Contractor, and Professional Engineer associated with the construction drawings
shall be responsible for the adequacy and satisfactory performance of the designs and the
installation of all items therein, and any failure or unsatisfactory performance of the system, so
constructed, shall not be a cause for action against the City. Approval of the construction
drawings by the City signifies only that the construction drawings meet the minimum
stipulations of these design criteria and City requirements based upon the information provided
to the City by the Professional Engineer and/or Developer, and makes no finding, representation,
or warranty that the system and associated components will perform satisfactorily.
3.7.3.1 Water Utility Construction Drawings
In addition to the general formatting and information to be included on all sheets of a
construction drawing set (e.g., north arrow, scale, project boundaries, lot lines, rights -of -way,
tracts, approval blocks, etc.), the following information shall be included on the final Water
Utility Plans.
1. Legend: Each sheet shall show the symbols pertaining to the sheet.
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Chapter 3. Water System Submittal Requirements
2. Vertical Datum: All elevations used for the planning, design and construction of
facilities shall be on the NAVD88 Datum.
3. Horizontal Benchmark and Coordinates: The horizontal benchmark shall be
specified. In order to facilitate the Engineering Department's GIS mapping
efforts, all basemapping providd to the City shall be placed in the State Plane
NAD83, Utah Central Zone Coordinate System and include the coordinates of a
known property corner on or adjacent to the site.
4. Plan views shall be oriented so that north is up on the sheet or to the right.
5. Water utility construction notes shall be provided for City review.
6. Overall Water System: In plan view, provide all information and dimensions for
horizontal layout of proposed water mains including but not limited to valves,
thrust blocks, reducers, tees, bends, crosses, fire hydrants, domestic water service
taps, lines and meters, irrigation taps, pressure reducing valves (PRVs),
combination air release/vacuum valves (ARVs) and vents, blow -off assemblies,
and any other appurtenances that are part of the potable water system.
7. Plan views shall show the locations and sizes of all existing and proposed utility
lines and appurtenances (water, sanitary sewer, stormwater, gas, electric,
telephone, cable, fiber optic, etc.) on and adjacent to the site. Plan views shall
show the location of all existing water wells and On -Site Wastewater Treatment
System (OWTS) on and adjacent to the site.
8. Plan views shall show existing water mains with sizes; valves; domestic and
irrigation water service taps, lines and meters; fire hydrants; pressure reducing
valves (PRVs); combination air release/vacuum valves (ARVs); and blow -off
assemblies on and adjacent to the site.
9. Plan views shall show existing and proposed curb, gutter, and sidewalks; and all
existing and proposed strucutures, such as vaults, catch basins, traffic islands,
street lights, walls or other permanent structures on and adjacent to the site.
10. Plan views and profiles shall show the tie-ins to the existing water distribution
system, including sizes of existing mains. In addition, the nearest water main
valves on existing mains shall be shown or, at a minimum, the distance to these
valves shall be included on the construction drawings.
11. Plan views and profiles shall show all needed off -site improvements, extensions
of service or upgrades to the City's water distribution system.
12. Plan views shall show and label the type and width of all existing and proposed
easements that are on and adjacent to the site.
13. Profile drawings are required for off -site construction and all water mains outside
of streets. All profile drawings shall include existing and final grade lines. In
certain instances, water main profiles may be waived if approved by the City. If a
water main profile is waived, then the following information shall be included:
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Chapter 3. Water System Submittal Requirements
a. All high points (HP) and low points (LP) along the water mains shall be
identified;
b. Where required by these Criteria, ARVs, vents and blow -offs shall be
shown throughout the water system, with the TOP and BOP elevations
provided; and
c. All utility crossings shall be identified.
14. Profile views or plan views: Adequate pipe elevation information is required for
all utility crossings of water, sanitary sewer, stormwater, gas, electric lines, etc.
The following information shall be included:
a. Types and sizes of the utility lines at the crossing and the stationing of the
crossing; and
b. If any pipes at crossing are encased, the coordinates at each end of the
encasement, and the type and thickness of the encasements shall be
specified. In addition, all utility crossing shall include either:
(1) A reference to the sheet where the crossing information is shown;
or
(2) Top of pipe and bottom of pipe elevations and vertical clearance at
the crossing with a callout of "(Min. = 1.5')" wherever the
clearance is 2 feet or less.
15. Water System Details: All pertinent details related to water system improvements,
such as pipe and fitting restraints, hydrant installations, PRVs, ARVs, blow -off
assemblies, utility crossings, trenching, etc., shall be shown on detail sheets on the
construction drawings. Where applicable, references to the City standard details
may be provided rather than reproducting the City standards in the construction
drawings. Specific detail numbers number be referenced with options indicated if
applicable.
16. Plan views shall show the boundaries of the City's pressure zones or a note shall
be added stating the pressure zone if the entire site is in only one pressure zone.
17. The construction drawings shall contain the following note: "Contractor shall
notify the City of Moab Public Works Department of any work that requires
shutdown or interruption of service of existing water mains two weeks prior to the
proposed shutdown or interruption unless otherwise approved by the City."
3.8 Record Drawings
All water system improvements constructed within public rights -of -way and dedicated easements
must be formally accepted by the City. The City's acceptance process will confirm that the
improvements have been constructed in accordance with the City's current Criteria.
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Chapter 4. Water System Design Criteria
4.1 Reference Design Documents
Primary standards and reference publications pertinent to the design of drinking water facilities
within the City of Moab are listed below. Unless otherwise specified, the latest editions shall
apply.
•
.
Utah State Code Annotated
Utah Administrative Code {R309{
American National Standards Institute (ANSI)
Utah Chapter of the American Public Works Association (Utah APWA)
American Water Works Association (AWWA)
American Society for Testing and Materials (ASTM)
Ductile Iron Pipe Research Association (DIPRA)
City of Moab Municipal Code
Cross Connection Control Program of Utah (April 2016)
4.2 Prohibited Installations
The following installations are prohibited unless otherwise approved by the City. Certain items
listed below reference Sections contained in these Criteria that provide the minimum design
requirements to be addressed, should a variance be pursued.
Private Water Booster Pumps (requires an exception from the Utah Division of
Drinking Water)
Unmetered Service Connections
4.3 Unlawful Connections
No installation of potable water supply piping or part thereof shall be made in such a manner that
it will be possible for used, unclean, polluted, or contaminated water, mixtures, or substances to
enter any portion of such piping from any tank, receptacle, equipment, or plumbing fixture by
reason of back siphonage, suction, back pressure, or any other cause, either during normal use
and operation, or when any such tank receptacle, equipment, or plumbing fixture is flooded, or
subject to pressure in excess of the main line operating pressure. No person shall make a
connection or allow one to exist between pipes or conduits carrying domestic water supplied by
the City and any pipes, conduits, or fixtures containing or carrying water, chemicals, liquids,
gases, or any other non -potable substance from any other source except as allowed by the Utah
Cross Connection Control Program. All connections must be approved by the City.
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Chapter 4. Water System Design Criteria
4.4 Minimum Water System Design Criteria
This section presents the minimum technical criteria for the analysis and design of water systems
within the boundaries of the City of Moab, including distribution and transmission mains, water
service lines, and the applicable appurtenances associated with these installations. Any special
criteria beyond those contained herein, and as determined necessary by the City, shall be
discussed at the pre -application consultation.
4.4.1. Design Demands
Average daily demands, peak day demands and average annual demands shall be based on the
criteria included in the current Utah Administrative Code. This information is currently located
at {R309-510-7 U.A.C.}. The City Engineer may adjust the demand values based on the
evaluation of actual use data, a current master plan or other conditions determined to affect the
safety and welfare of the public.
4.4.1.1 Fire Flows
The developer shall develop recommended fire flows based on the currently adopted fire code,
the type of construction and the size of construction. This information is currently located in
Appendix E of the 2012 International Fire Code. Based on this information, the City Fire
Official will determine the fire flow required for each development.
4.4.2 Storage Requirements
Storage requirements shall be based on the criteria included in the current Utah Administrative
Code. This information is currently located at {R309-510-8 U.A.C.}. The City Engineer may
adjust the storage values based on the evaluation of actual use data, a current master plan or other
conditions determined to affect the safety and welfare of the public.
4.4.3 Minimum Hydraulic Performance Criteria
All mains shall be sized to provide for municipal, irrigation and fire protection demands to all
points in the City without violating the pressure criteria set forth herein. The maximum average
velocity must be a maximum of 6 feet/second, unless otherwise approved by the City.
The minimum and maximum pressures shall be as provided in the following table:
Hydraulic Condition
Pressure*
Peak Day Demand Plus Fire Flow
20 psi min.
Peak Instantaneous Demand
30 psi min.
Peak Day Demand
40 psi min.
No Demand (static)
120 psi
max.
Exception: Areas of the water system approved before January 1, 2007
must maintain water pressures at the point of connection of 20 psi min.
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Chapter 4. Water System Design Criteria
4.4.3.1 Operating Pressures and Pressure Zone Characteristics
The City of Moab water system included several pressure zones. The developer should consult
with the City to determine the range of pressures expected under normal operating conditions.
4.4.3.2 Location of Pressure Reducing Valves
If the water pressures within the development are expected to exceed the maximum pressure or if
it is anticipated that the development will cause pressures to increase in other areas of the water
system, the developer shall install a pressure reducing valve station to reduce pressures. Pressure
reducting valves are also required at pressure zone boundaries. The cost of the pressure reducing
valve stations for areas of new development will be borne by the developer.
4.4.4 Minimum Distribution Main Sizing and Valve Spacing
Water distribution mains shall have a minimum diameter of 8 inches. Isolation valves at
locations other than intersections shall be located with a distance between valves of not more
than 500 feet, except in residential zones spacing between valves may be 800 feet. The City may
approve exceptions in areas of widely scattered customers with no future anticipated
development.
Isolation valves are required in all directions at junctions, except for branches to fire hydrants.
For example, all tees shall have three valves. All crosses shall have four valves. Valves for fire
hydrants shall be in accordance with the City standard details.
4.4.5 General Water System Layout Criteria
4.4.5.1 Location
All water mains and appurtenances shall be installed in public right-of-way or dedicated utility
easements. Water mains shall not be installed parallel to and directly below, any concrete such as
sidewalks, trails, curbs, or gutters, and no water manholes or appurtenances shall be located in
multi -use trails and sidewalks. Mains shall be located in accordance with the City's standard
details, unless otherwise approved by variance from the City. In public streets, water mains shall
be located near the shoulder of the road when possible. Otherwise the location should be
coordinated with the Cith Water Department. Under no circumstances shall the edge of a main
be closer than 5 feet from a gutter pan. Water system layouts in cul-de-sacs shall be in
accordance with the City's Standard Details.
4.4.5.2 Horizontal Layout
Horizontal separation from potable water mains to storm sewers and sanitary sewers shall be ten
feet, edge -to -edge. Horizontal separation from raw (untreated) water lines to storm sewers and
sanitary sewers shall be five feet, edge -to -edge. The City must specifically approve any variance
from this requirement in the event that it has been determined that it is impossible to maintain the
specified horizontal separation distance.
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Chapter 4. Water System Design Criteria
Water mains adjacent to developments shall be designed to extend along the entire frontage of
the property to be served, from property line to property line, in order that service will thereupon
be available to adjacent Developers or Builders to subsequently extend from in the future. Any
off -site water mains necessary to serve the development property shall be extended at the sole
expense and obligation of the Developer.
Water main alignments in utility easements or tracts between structures (residences, businesses,
etc.) shall only be allowed for the purpose of looping a water main at the end of a cul-de-sac, and
shall include provisions for a Main -Break Swale as set forth in these Criteria. Under no
circumstances shall water mains be installed directly below any concrete such as sidewalks,
curbs, or gutters, except at 90-degree angles where crossings beneath the concrete features are
required.
4.4.5.3 Vertical Layout
The minimum depth of cover for water mains from final grade to the top of the water main shall
be 4 feet. The maximum depth of cover for water mains shall be 6 feet from top of pipe to final
grade unless associated with a water main lowering in accordance with the City's Standard
Details, or as otherwise approved by the City. Under circumstances where a deeper main would
eliminate the need for an air valve, mains may be constructed with a cover up to 7.5 feet, and the
plans shall note that high points are to be avoided over such a reach.
In the event that the water line crosses a sewer line or storm drain line, the water line must be
above the sewer line and have a minimum separation of 18 inches.
4.4.6 Pipe Joint Deflection
Design of DIP deflections shall be in accordance with the latest edition of AWWA C600 entitled
"Installation of Ductile Iron Water Main and their Appurtenances". Design of PVC pipe
deflections shall be in accordance with the latest edition of AWWA Manual M23 entitled "PVC
Pipe — Design and Installation".
Water main joint deflection for DIP and PVC shall not exceed one half of the manufacturer's
maximum allowable deflection for the specified pipe diameter and lay length, or one half of the
maximum deflection allowed by AWWA, whichever is less. Fittings, bends, or couplings that
allow additional angular offset shall be used to achieve gradual alignment changes that exceed
the axial joint deflection limits stated herein.
4.4.7 Distribution Main Looping
All water systems shall be effectively looped. No dead-end lines will be permitted except lines
extending into cul-de-sacs serving no more than 12 single-family residential units or equivalent
residential connections (ERCs) and with a length of no more than 400 feet. A fire hydrant shall
be placed at the deepest point of any cul-de-sac.
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Chapter 4. Water System Design Criteria
Water quality is a design consideration for any system, and an aging analysis and/or model may
be required at the discretion of the City to insure that water quality concerns will not be created
as a result of any proposed distribution system layout. Water quality sampling stations may be
required by the City at specific locations within new developments to continue to adequately
monitor the overall quality of the City's expanding system.
Distribution mains shall be PVC pipe in accordance with AWWA C-900 DR 18 or Ductile Iron
Pipe Class 350 in accordance with applicable AWWA standards. Other types of pipe material
may be approved by the City.
4.4.8 Transmission Mains
All water mains 16 inches and larger in diameter shall be classified as "transmission mains", and
shall correspond to the sizes established in the latest edition of the City's water distribution and
storage master plan. Raw water lines that run between wells and points of disinfection or
purification, regardless of size, shall also be considered transmission mains. Air and vacuum
release valves shall be installed along transmission mains at all high points and pumping
manholes may be required at low points. Temporary blow -off assemblies shall be installed in
accordance with the City's Standard Details at all temporary dead -ends along transmission
mains. No service connections, including irrigation taps, shall be permitted on a transmission
main.
Transmission main valves shall be butterfly valves, and shall be required on every branch where
two transmission mains connect. Valves shall be installed in accordance with the City's Standard
Details and shall be located 10 feet from the connection wherever possible, but shall in no case
be less than 5 feet. Maximum valve spacing along transmission mains shall be no more than
1,200 feet, provided there are no intersecting distribution mains.
Where distribution mains connect to transmission mains, a gate valve is required on the
distribution main, and the goal shall be to locate butterfly valves along the transmission main so
that no more than 16 residential units and one fire hydrant will be out of service at any given
time, whether for maintenance, or in the event of a water main break. It is the responsibility of
the developer to verify compliance with this requirement by considering effective looping, as
well as other applicable requirements.
Transmission mains shall be PVC pipe in accordance with AWWA C-900 DR 18 or C-905 DR
18 or Ductile Iron Pipe (Cement Morter Lined) Class 350 or Class 250 in accordance with
applicable AWWA standards. Other types of pipe material may be approved by the City.
4.4.9 Bored Crossings
When a water main passes under a State roadway, an arterial or collector roadway as defined by
the City, railroad, drainage way or irrigation ditch, the main shall be located within bored steel
casing pipe, unless otherwise allowed to be open cut by the jurisdictional entity being crossed.
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Chapter 4. Water System Design Criteria
The carrier pipe shall be sleeved and sealed within the casing pipe and shall have a minimum of
4 feet of cover to top of casing. The casing pipe shall extend the entire width of the right-of-way
or easement of the crossing structure, or as directed by the City or other jurisdictional entity.
Valves with appropriate restrained lengths shall be located near each right-of-way or easement
line, just beyond the ends of the casing pipe, to provide for the isolation of the main during
maintenance or inspection.
Crossings at ditches shall include cutoff walls at each side of the crossing, either as required by
the jurisdictional entity, or as analyzed and designed by the Engineer at the direction of the City
and shall comply with {R309-550-8(8) U.A.C.{.
Casing pipe shall be smooth -walled, non -coated pipe of welded steel construction conforming to
ANSUAWWA C200, and shall be seamless or straight seam steel pipe with minimum yield
strength of 35,000 psi. The casing pipe shall be constructed of new material and have a minimum
wall thickness as follows unless specified otherwise.
Carrier Pipe Nominal
Diameter
Min. Casing
Pipe O.D.
Min. Wall Thickness*
4"
12"
0.250"
6"
14"
0.250"
8"
16"
0.322"
12"
20"
0.375"
*The boring contractor shall determine the necessary casing wall thickness and
provided a wall thickness that is greater than included in the above table if
needed. Other diameter pipes sizes shall be designed by a professional
engineer and submitted to the City of Moab for review.
Casing pipe shall be cathodically protected by burying a pair of sacrificial anodes 10 feet from
each end of the casing. Anode wires shall pass from the casing pipe to terminal boards inside
surface -mounted cast iron lids at each casing end, and then on to the anodes themselves. All
anodes shall be buried vertically or horizontally with the top of the anodes set at a depth equal to
the casing spring line. Anode pairs shall be offset perpendicularly 5 feet away from the casing
pipe, and shall be placed in native soils, not imported backfills. The cathodic protection system
shall be designed by competent technical personnel experienced with these types of systems, and
shall be submitted to the City for review and approval. Long-term maintenance of the system,
including anode assessment and replacement, shall be addressed in the submittal.
4.4.10 Appurtenances
4.4.10.1 Valves
All water distribution systems shall have valves to ensure that no more than 500 feet of main will
be out of service in the event of a single water main break, except for residential area where 800
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Chapter 4. Water System Design Criteria
feet of main may be out of service. Valve placement at water main intersections shall be such
that three valves are required at every tee and four valves at every cross. Existing valves may be
utilized to satisfy these requirements. Valves shall be the same nominal size as the adjacent pipe.
Post indicator valves shall be placed on private fire lines, unless this requirement is waived by
the fire official. Valves shall be placed on the branch serving a fire hydrant.
Valves shall be located to provide for the extension, pressure testing, and chlorination of new
water mains without the disruption of the existing system. Additional valves shall be considered
by the developer to minimize inconveniences and safety hazards during repairs at critical
locations within the system, and to provide for the ability to conduct water quality monitoring
and alleviate water quality concerns that may be reasonably anticipated.
Valves up to 12 inches shall be resilient seated gate valves which meet requirements of AWWA
C-509.
Valves 14 inches and larger shall be butterfly valves, with valve operators located on the north
and east sides of the mains. Under no circumstances shall a valve be located in concrete, such as
sidewalks, cross pans, aprons, curbs, or gutters. Valves shall meet requirements of AWWA C-
504.
Valve boxes shall be in accordance with City Standard Details and shall be brought up to grade
at the time of pavement placement or overlay. Any valve located in an unpaved area shall have a
reinforced concrete collar around the valve box and the accompanying marker.
Temporary dead -ends on any water main shall include a temporary blow -off. Dead -ends on lines
that will not be extended shall be provided with permanent hydrants at the terminus of the dead
end.
4.4.10.2 Pressure Reducing Valves
Pressure -reducing valve (PRV) installations are used to control and maintain pressure between
distribution pressure zones, and shall be installed at locations determined by the City.
Downsizing of the main shall not be allowed at the valve, unless approved by the City. The City
shall determine the PRV pressure settings necessary to maintain the City's pressure zones, shall
be present when PRVs are put into service, and shall inspect these facilities.
4.4.10.3 Fire Hydrants
Fire hydrant spacing and proximity to structures shall be as required by the latest version of the
State of Utah adopted fire code, however spacing between hydrants at and adjacent to the project
shall not exceed 500-feet. The distance between fire hydrants shall be measured along an
unobstructed path. All hydrants shall be installed to conform to the grade and alignment shown
on the plans.
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Chapter 4. Water System Design Criteria
All fire hydrant locations will ultimately be subject to the approval of the City Fire Chief.
Hydrants shall be placed as shown in the City's Standard Details within the right-of-way or in a
utility easement. Wherever possible, hydrants shall be located on the same side of the street as
the water main, unless otherwise directed by the City. Preference shall be given to locating
hydrants near street corners, rather than to locations near streetlights. Hydrants shall be located
at the end of every cul-de-sac.
When hydrants are to be installed at locations other than street intersections, they shall be located
at the extension of property side lot lines. In no case shall a hydrant be located closer than 5 feet
to obstructions, driveways, etc., and no closer than 10 feet from a curb inlet. Fences,
landscaping, etc., shall in no way hinder the operation of the fire hydrant.
Fire hydrant lateral lines shall be set at 90 degrees to mains and shall be no more than 70 feet in
length between the hydrant and the main. Tap shall not be made on a hydrant lateral.
The make and model of the installed fire hydrants must be approved by the Public Works
Department.
4.4.10.4 Thrust Restraint
All bends, tees, crosses, wyes, plugs, dead -ends, wet taps (in certain cases), hydrants, blow -offs
and other fittings with unbalanced thrust forces shall be designed and constructed with concrete
thrust blocks in accordance with the City's Standard Details. If the soil -bearing capacity is
unknown, it shall be assumed to be 2,000-pounds/square foot in determining the appropriate size
of the thrust block. In addition to thrust blocks, joints shall be mechanically restrained for the
required distances from valves and fittings. The entire length of fire hydrant lines and fire
service lines, as well as pipe in fill areas, shall be restrained.
4.4.10.5 Meters and Service Connections
All service connections shall be metered. In general, residential and commercial meters shall be
installed within the public right of way and shall conform to the City Standard Drawings. Fire
lines are not considered service connections for this requirement and don't require a meter.
All meters connected to the City's water distribution system shall be the property of the City.
Under no circumstances shall anyone other than City personnel remove a water meter once the
pit, vault, or authorized inside installation has been inspected and approved. No connections
shall be made in the meter pit other than those directly related to the meter and bypass. Single-
family residential irrigation system connections shall be made downstream from the meter and
double check backflow prevention assembly. All other uses require irrigation service connections
separate from the domestic service connection.
Maximum design flows through meter shall be limited to 80% of the maximum rate flow. The
continuous flow shall be limited to 50% of the maximum rated flow. In all cases, the maximum
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Chapter 4. Water System Design Criteria
and minimum flows shall be within the flow range and performance requirements of the meter
manufacturer.
For all water meter installations, detailed drawings of the proposed installation, indoor and
outdoor water use volumes and flowrates and water fixture unit counts shall be included as an
integral part of the plans submitted to the City for review. There shall be no electrical wiring
allowed in any water meter pit or vault unless authorized in writing by the City. Fixture unit
counts for residential, commercial or industrial use shall be determined by a Professional
Engineer in accordance with the procedures set forth in plumbing code, and as approved by the
City.
4.4.10.6 Fire Protection Service Lines
Fire service lines shall be ductile iron (3-inch diameter and larger) or type K copper (2 inch
diameter and smaller) from the main to the backflow prevention assembly unless approved by
the City Fire Department. All fire service lines shall be fully restrained in their entirety.
The customer/owner shall own and maintain all private fire service lines from the tap on the
main to the building. All fire sprinkler taps shall be installed with a backflow prevention
assembly approved by the City and as required by the latest edition of the Utah Cross -
Connection Control Manual. A flow switch shall be provided on the riser that indicates whether
or not water has flowed through the line. Tapping these lines for fire hydrants, domestic water,
and/or any other purpose shall not be permitted. Commercial properties requiring a domestic
service line and a fire protection service line shall have separate taps for each.
Fire protection service lines and fire department connection (FDC) locations shall be included on
the Construction Drawings. FDCs are to be freestanding in a location approved by the Fire
Official and shall be constructed as required by the Fire Official.
4.4.10.7 Manholes
Manholes shall be installed in conjunction with all air release vaults in accordance with the
City's Standard Details. Manhole lids shall not be aligned with vehicle wheel paths, or within 2
feet either direction of the street crown.
4.4.10.8 Backflow Prevention Assemblies
To prevent backflow contamination of the City's potable water mains, a backflow prevention
assembly shall be installed where pressures downstream of the water meter could exceed those in
the main, and where any unsafe water or contaminated materials could be discharged, or drawn
into the potable water system under a condition of back-siphonage. The assembly shall be placed
downstream of the water meter and shall be installed and tested in accordance with City's Cross
Connection Control Program. The assemblies shall meet the most restrictive requirements set
forth in the latest editions of the City of Moab and State of Utah Cross -Connection Control
Programs, and shall further meet the requirements of the adopted plumbing codes. Backflow
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Chapter 4. Water System Design Criteria
prevention assemblies shall be installed and located to provide for proper operation of the device,
and easy access for annual testing and maintenance
Determination of the particular device shall be at the discretion of the Public Works Department.
All service connections, including irrigation and fire line connections, shall require backflow
prevention.
4.4.10.9 Combination Air Release and Vacuum Valves
Combination air relief valves and vaults shall be located at all high points in the transmission and
distribution system in accordance with the City's Standard Details.
4.4.10.10 Blow -off Pumping Manholes
In accordance with the City's Standard Details, a pumping manhole shall be installed at all low
points on transmission mains.
4.4.10.11 Tracer Wire and Warning Tape
Tracer wire shall be affixed to the top of all water mains regardless of pipe material and
terminated in test stations located behind each fire hydrant or in valve boxes. The maximum
distance between test stations or tracer wire boxes shall be 500 feet. Warning tape shall be
installed one foot above the top of pipe on all water mains, regardless of pipe material.
4.4.11 Fill Areas
Where water mains will be constructed in fill areas, all fill materials shall be placed and
compacted to final grade prior to the installation of the water main and appurtenances. All fill
material shall meet the City's standards and be approved by the City. Water mains within fill
areas shall have restrained joints in accordance with these Criteria.
4.4.12 Trail Access
Where water mains cannot be located in public right-of-way, the facilities shall be located in
areas that allow direct access by maintenance vehicles. Proposed trails to be used to access water
mains and appurtenances must meet the following requirements, and shall be submitted for
review and approval by the City:
1. The longitudinal slope must not exceed 10% and the cross slope must not exceed
4% unless approved by the City.
2. The Parks Department must approve this use.
3. The width of the drivable surface shall be a minimum of 10 feet for a straight
portion of trail and at least 12 feet wide for curved portions, depending on the
curve radii. A shoulder may be required.
4. The trail shall be designed to support an AASHTO HS-201oad.
5. The trail must be in a utility, public access or trail easement a minimum of 20 feet
wide.
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Chapter 4. Water System Design Criteria
Information regarding the width, type and depth of material specified for trails to be used to
access water system facilities shall be submitted for review by the City, and shall include
acknowledgement from the Parks Department that utility access is approved for the particular
trail.
4.4.13 Main -Break Swale Design
All water mains to be constructed between structures (residences, businesses, etc.) must have a
"main -break" swale or channel that provides adequate capacity in the event of a water main
break. The swale must be located in a dedicated open space or utility tract maintained by the
Owner.
4.4.14 Future Connections
A temporary blow -off assembly, is required at the terminal end of any water main that is to be
extended in the future. Such discontinued mains shall have valves located such that only a single
valve will need to be closed when the main is extended. Joints shall be restrained an adequate
distance from the valve per the City's Standard Details to ensure that the valve will not blow off
when the line is exposed for extension. No service taps shall be allowed between the isolation
valve and the dead end on any main that may be extended in the future.
4.4.15 Water Service Lines
All single family residential dwellings, each individual unit in multi -family complexes, including
duplexes, and each commercial business, industrial, and irrigation customer shall be served by a
separate, independent water service line and meter. The City will consider the use of a single
water meter for multi -family complexes if requested by the Developer and if sub -metering of
individual units is provided.
4.4.15.1 Layout
The Developer shall install a service line stub -out from the water main to each individual lot,
including the corporation stop valve and meter box. Where sidewalks are proposed, the stub -out
shall be constructed to five feet beyond the back of the sidewalk. Where sidewalks will not be
constructed, the stub -out shall be constructed a minimum of one foot beyond the property line.
The stub -outs shall be plugged and the end marked with a blue painted T-post installed in the
ground directly above the location of the plugged end.
All service line sizes and locations shall be shown on the water system Construction Drawings to
be approved by the City. The services shall be constructed as shown on the construction
drawings unless otherwise approved in writing by the City. The stationing, length, size and
direction of the service line shall be shown in plan view on the construction drawings.
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Chapter 4. Water System Design Criteria
4.5 Easements
Where mains cannot be installed in right-of-way, they shall be located within utility easements
approved by the City and shall be centered in the easement. The minimum easement width shall
be 20 feet for one utility. The width of easements which include more than one utility will be
determined by the City. Site -specific circumstances may dictate the need for wider easements.
Utility easements and dedicated utility tracts shall be defined by bearings and distances around
the perimeter of the easement. Centerline legal descriptions are not acceptable.
The main shall be located a minimum of 10 feet from and parallel to the edge of the utility
easement. All meters and fire hydrants not installed within the right-of-way will require an
easement dedication 10 feet wide and extending 3 feet behind the meter or hydrant. If the meter
or hydrant easement is longer than 10 feet, the width of the easement shall be a minimum of 20
feet. Fire hydrants and meters shall be centered in all such easements.
All utility easements shall be for the exclusive use of the City. No permanent structures, (e.g.,
retaining walls, trees, light pedestals, sign foundations, power poles, mailboxes, sheds, buildings,
etc.), shall be placed in the easement.
Where it is necessary to locate a water main along back lot lines, the main shall be offset a
minimum of 10 feet from the lot line, and the alignment shall be specifically approved by the
City to provide reasonable access for maintenance crews.
4.6 Testing and Disinfection
All distribution and transmission lines, and all other piping and fittings shall be flushed, pressure
and leak tested and disinfected. After disinfection, bacteriological samples shall be taken from
the lines. Pressure testing shall be in accordance with AWWA Standard C600-10. Disinfection
and bacteriological testing of facilities shall be in accordance with AWWA Standard C651-05.
Water lines and facilities shall not be connected to the public water system until the
bacteriological tests indicate that the water is free from contamination.
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Chapter 5. Accessory Facilities Design
5.1 General
5.1.1 Scope
It is not anticipated that developers will typically be involved in the design or construction of
wells, pump stations, storage tanks or water treatment systems which are part of the City's public
water system. The City asserts the right to assume the lead design and construction roles for
these facilities. However, at the City's option, the City may allow or require the developer to
design and construct these facilities related to the development. Design of these facilities will be
in accordance with the State of Utah Administrative Rules {R309 U.A.C{ and the applicable
building codes.
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