HomeMy Public PortalAboutCity of Breckenridge Hills3/26/2021 City of Breckenridge Hills, MO Ecode360
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City of Breckenridge Hills, MO
Friday, March 26, 2021
Chapter 420. Grading, Erosion and Sediment Control
Section 420.010. Introduction — Purpose.
[Ord. No. 1100 §I, 3-20-2006]
During the construction process, soil is highly vulnerable to erosion by wind and water. Eroded soil
endangers water resources by reducing water quality and causing the siltation of aquatic habitat
for fish and other desirable species. Deposits of eroded soil also necessitates maintenance of
sewers and ditches and the dredging of lakes. In addition, clearing and grading during
construction cause the loss of native vegetation necessary for terrestrial and aquatic habitat.
Construction activities also utilize materials and generate wastes which, if not properly controlled,
can pollute receiving waters.
The purpose of this Chapter is to safeguard persons, protect property and prevent damage to the
environment in the City of Breckenridge Hills. This Chapter will also promote the public welfare by
guiding, regulating and controlling the design, construction, use and maintenance of any
development or other activity that disturbs or breaks the topsoil or results in the movement of earth
on land in the City of Breckenridge Hills.
Section 420.020. Definitions.
[Ord. No. 1100 §II, 3-20-2006]
For the purposes of this Chapter, the following terms, phrases, words and their derivations shall have
the meanings given herein.
BEST MANAGEMENT PRACTICES OR BMPS
Practices, procedures or a schedule of activities to reduce the amount of sediment and other
pollutants in stormwater discharges associated with construction and land disturbance activities.
CLEARING
Any activity that removes the vegetative surface cover.
CONSTRUCTION OR LAND DISTURBANCE SITE OR SITE
A parcel of land or a contiguous combination thereof where grading work is performed as part of a
single unified plan of development.
DRAINAGE WAY
Any channel that conveys surface runoff through a site.
EROSION
The wearing away of land surface through the action of wind or water.
EROSION CONTROL
Any BMP that prevents or minimizes erosion.
GRADING
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Reshaping the ground surface through excavation and/or fill of material, including the resulting
conditions.
LAND DISTURBANCE ACTIVITIES
Any activity such as clearing, grading or any other action which results in removal of the natural
site vegetation and destruction of the root zone or otherwise results in leaving the ground surface
exposed to soil erosion through the action of wind or water.
PERIMETER CONTROL
A barrier that prevents sediment from leaving a site by filtering sediment- laden runoff or diverting
it to a sediment trap or basin.
PHASING
Clearing a parcel of land in distinct phases, with the stabilization of each phase substantially
completed before the clearing of the next.
RUNOFF COEFFICIENT
The fraction of total rainfall that will appear at the outfalls from a site.
SEDIMENT CONTROL
Any BMP that prevents eroded sediment from leaving a site.
SITE DISTURBANCE PERMIT
A permit issued by the municipality authorizing disturbance of the land at a specific site subject to
conditions stated in the permit.
STABILIZATION
The use of BMPs that prevent exposed soil from eroding including improvements and structures
for the control of erosion, runoff and grading.
START OF CONSTRUCTION
The first (1st) land disturbing activity associated with a development, including land preparation
such as clearing, grading and filling; installation of streets and walkways; excavation for
basements, footings, piers or foundations; erection of temporary forms; and installation of
accessory buildings such as garages.
STORM WATER POLLUTION PREVENTION PLAN (SWPPP)
A management plan, the purpose of which is to ensure the design, implementation, management
and maintenance of BMPs in order to reduce the amount of sediment and other pollutants in
stormwater discharges associated with land disturbance activities, comply with the standards of
the City and ensure compliance with the terms and conditions of the applicable State permits,
including adherence to the land disturbance program contained in Missouri State issued MS4
NPDES permit.
WATERCOURSE
A natural or artificial channel or body of water, including, but not limited to lakes, ponds, rivers,
streams, ditches and other open conveyances, that carry surface runoff water either continuously
or intermittently.
Section 420.030. Permits.
[Ord. No. 1100 §III, 3-20-2006]
Any person who intends to conduct any land disturbance activity that will disturb ten thousand
(10,000) or more square feet must obtain a site disturbance permit from the City of Breckenridge
Hills.
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Any person who buys a lot for construction from a person who has been issued a permit under
Subsection (A) above (unless purchased for the purpose of building their own private residence)
must obtain a separate site disturbance permit from the City of Breckenridge Hills unless the
original permittee retains responsibility for the land disturbance activities on the sold lot.
Site disturbance permits are not required for the following activities:
Any emergency activity that is immediately necessary for the protection of life, property or
natural resources.
Existing nursery and agricultural operations conducted as a permitted main or accessory use.
Each permit application shall bear the name(s) and address(es) of the owner or developer of the
site and of any consulting firm retained by the applicant together with the name of the applicant's
principal contact at such firm and shall be accompanied by a filing fee.
Each permit application shall be accompanied by a Storm Water Pollution Prevention Plan
prepared for the specific site by or under the direction of a qualified professional and a statement
that any land clearing, construction or development involving the movement of earth shall be in
accordance with the Storm Water Pollution Prevention Plan.
The permit applicant will be required to file with the City of Breckenridge Hills a faithful
performance bond, letter of credit or other improvement security in an amount deemed sufficient
by the City of Breckenridge Hills to cover all costs of improvements, landscaping, maintenance of
improvements for such period as specified by the City of Breckenridge Hills and engineering and
inspection costs to cover the cost of failure or repair of improvements installed on the site.
The permit applicant will be required to obtain a land disturbance permit issued by the Missouri
Department of Natural Resources for any site where one (1) acre or more of land will be disturbed,
before beginning any site work authorized by a City permit. This requirement applies to sites of
less than one (1) acre that are part of a larger common plan that will ultimately disturb one (1) acre
or more.
Section 420.040. Storm Water Pollution Prevention Plan
(SWPPP).
[Ord. No. 1100 §IV, 3-20-2006]
The design requirements in Section 420.050 shall be taken into consideration when developing
the Storm Water Pollution Prevention Plan and the plan shall include the following:
Name, address and telephone number of the site owner and the name, address and
telephone number of the individual who will be in overall responsible charge of
construction/development activities at the site.
Site address or location description.
A site map showing the outlines of the total project area, the areas to be disturbed, existing
land uses, locations and names of surface water bodies, locations of temporary and
permanent BMPs and such other information as the City Building Inspector may require.
Existing contours of the site and adjoining strips of off-site property and proposed contours
after completion of the proposed grading and development, based on United States
Geological Survey datum, with established elevations at buildings, walks, drives, street and
roads; and information on necessary clearing and grubbing, removal of existing structures,
excavating, filling, spreading and compacting.
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A natural resources map identifying soils, forest cover and resources protected under other
Chapters of the City of Breckenridge Hills City Code.
An estimate of the runoff coefficient of the site prior to disturbance and the runoff coefficient
after the construction addressed in the permit application is completed.
Estimated grading quantity.
Details of the site drainage pattern both before and after major grading activities.
Construction access to site.
Description of BMPs to be utilized to control erosion and sedimentation during the period of
land disturbance.
Description of BMPs to be utilized to prevent other potential pollutants such as construction
wastes, toxic or hazardous substances, petroleum products, pesticides, herbicides, site litter,
sanitary wastes and other pollutants from entering the natural drainage ways during the
period of construction and land disturbance.
Description of BMPs that will be installed during land disturbance to control pollutants in
stormwater discharges that will occur after land disturbance activity has been completed.
Location of temporary off-street parking and wash-down area for related vehicles.
Sources of off-site borrow material or spoil sites and all information relative to haul routes,
trucks and equipment.
The anticipated sequence of construction and land disturbance activities, including installation
of BMPs, removal of temporary BMPs, stripping and clearing; rough grading; construction of
utilities, infrastructure and buildings; and final grading and landscaping. Sequencing shall
identify the expected date(s) on which clearing will begin, the estimated duration of exposure
of cleared areas, areas of clearing, installation of temporary erosion and sediment control
measures and establishment of permanent vegetation.
All erosion and sediment control measures necessary to meet the objectives of this Chapter
throughout all phases of construction and after completion of site development. Depending
upon the complexity of the project, the drafting of intermediate plans may be required at the
close of each season.
Seeding mixtures and rates, types of sod, method of seedbed preparation, expected seeding
dates, type and rate of lime and fertilizer application and kind and quantity of mulching for
both temporary and permanent vegetative control measures.
Provisions for maintenance of control facilities, including easements, and estimates of the
cost of maintenance.
Plans for responding to any loss of contained sediment to include the immediate actions the
permittee will take in case of a containment failure. This plan must include documentation of
actions and mandatory reporting to the Department of Public Works.
Schedules and procedures for routine inspections of any structures provided to prevent
pollution of stormwater or to remove pollutants from stormwater and of the site in general to
ensure all BMPs are continually implemented and are effective.
The permittee shall amend the Storm Water Pollution Prevention Plan whenever:
Design, operation or maintenance of BMPs is changed;
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Design of the construction project is changed that could significantly affect the quality of the
stormwater discharges;
Site operator's inspections indicate deficiencies in the SWPPP or any BMP;
Inspections by the City or by the Missouri Department of Natural Resources indicate
deficiencies in the SWPPP or any BMP;
The SWPPP is determined to be ineffective in significantly minimizing or controlling erosion or
excessive sediment deposits in streams or lakes;
The SWPPP is determined to be ineffective in preventing pollution of waterways from
construction wastes, chemicals, fueling facilities, concrete truck washouts, toxic or hazardous
materials, site litter or other substances or wastes likely to have an adverse impact on water
quality;
Total settleable solids from a stormwater outfall exceeds one-half (0.5) ml/L/hr if the discharge
is within the prescribed proximity of a "Valuable Resource Water" as defined by the MDNR;
Total settleable solids from a stormwater outfall exceeds two and one-half (2.5) ml/L/hr for any
other outfall; or
The City of Breckenridge Hills or the Missouri Department of Natural Resources determines
violations of water quality standards may occur or have occurred.
The permittee shall:
Notify all contractors and other entities (including utility crews, City employees or their agents)
who will perform work at the site of the existence of the SWPPP and what actions or
precautions shall be taken while on site to minimize the potential for erosion and the potential
for damaging any BMP;
Determine the need for and establish training programs to ensure that all site workers have
been trained, as a minimum, in erosion control, material handling and storage and
housekeeping;
Provide copies of the SWPPP to all parties who are responsible for installation, operation or
maintenance of any BMP; and
Maintain a current copy of the SWPPP on the site at all times.
Section 420.050. Design Requirements.
[Ord. No. 1100 §V, 3-20-2006]
Grading, erosion control practices, sediment control practices and watercourse crossings shall be
adequate to prevent transportation of sediment from the site to the satisfaction of the Department
of Public Works.
Cut and fill slopes shall be no greater than 3:1, except as approved by the Department of Public
Works to meet other community or environmental objectives.
Clearing and grading of natural resources, such as forests and wetlands, shall not be permitted
except when in compliance with all other Chapters of the City of Breckenridge Hills Code of
Ordinances.
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Clearing techniques that retain existing vegetation to the maximum extent practicable shall be
used and the time period for disturbed areas to be without vegetative cover shall be minimized to
the extent practical to the satisfaction of the Department of Public Works.
Clearing, except that necessary to establish sediment control devices, shall not begin until all
sediment control devices have been installed and have been stabilized.
Phasing shall be required on all sites disturbing greater than thirty (30) acres, with the size of each
phase to be established at plan review and as approved by the Department of Public Works.
Erosion control requirements shall include the following:
Soil stabilization shall be completed within five (5) days of clearing or inactivity in construction.
If seeding or another vegetative erosion control method is used, it shall become established
within two (2) weeks or the Department of Public Works may require the site to be reseeded
or a non-vegetative option employed.
Techniques shall be employed to ensure stabilization on steep slopes and in drainage ways.
Soil stockpiles must be stabilized or covered at the end of each workday.
The entire site must be stabilized, using a heavy mulch layer or another method that does not
require germination to control erosion, at the close of the construction season.
Techniques shall be employed to prevent the blowing of dust or sediment from the site.
Techniques shall be employed to divert upland runoff past disturbed slopes.
Sediment control requirements shall include:
Settling basins, sediment traps or tanks and perimeter controls.
Settling basins shall be provided for each drainage area with ten (10) or more acres disturbed
at one (1) time and shall be sized to contain five-tenths (0.5) inch of sediment from the
drainage area and be able to contain a 2-year, 24-hour storm. If the provision of a basin of
this size is impractical, other similarly effective BMPs, as evaluated and specified the SWPPP,
shall be provided.
Settling basins shall be designed in a manner that allows adaptation to provide long-term
stormwater management as required by the Department of Public Works.
Settling basins shall have stabilized spillways to minimize the potential for erosion of the
spillway or basin embankment.
Protection for adjacent properties by the use of a vegetated buffer strip in combination with
perimeter controls.
Watercourse protection requirements shall include:
Encroachment into or crossings of active watercourses/riparian areas and wetlands shall be
avoided to the maximum extent practicable. Where applicable, all local, State and Federal
permits and approvals shall be provided to the Department of Public Works prior to the
issuance of a site disturbance permit.
Stabilization of any watercourse channels before, during and after any in-channel work.
If a defined watercourse is to be realigned or reconfigured, clearing and grubbing activities
within fifty (50) feet of the watercourse shall not begin until all materials and equipment
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necessary to protect the watercourse and complete the work are on site. Once started, work
shall be completed as soon as possible. Areas within fifty (50) feet of the watercourse shall be
recontoured and revegetated, seeded or otherwise protected within five (5) working days after
grading has ceased.
All stormwater conveyances shall be designed according to the criteria of the Metropolitan St.
Louis Sewer District (MSD) and the necessary MSD permits obtained.
Stabilization adequate to prevent erosion shall be provided at the outlets of all pipes and
paved channels.
Construction site access requirements shall include:
A temporary access road provided at all sites including a wash-down area supporting all
active sites,
Other measures required by Department of Public Works in order to ensure that sediment is
not tracked onto public streets by construction vehicles or washed with wash effluent
channeled directly into storm drains.
Control requirements for construction materials, construction wastes and other wastes generated
on site shall include provisions, satisfactory to the Department of Public Works, for:
Spill prevention and control facilities for materials such as paint, solvents, petroleum products,
chemicals, toxic or hazardous substances, substances regulated under the Resource
Conservation and Recovery Act (RCRA) or the Comprehensive Environmental Response,
Compensation and Liability Act (CERCLA) and any wastes generated from the use of such
materials and substances, including their containers. Any containment systems employed to
meet this requirement shall be constructed of materials compatible with the substances
contained and shall be adequate to protect both surface and ground water.
Collection and disposal of discarded building materials and other construction site wastes,
including those listed in Subsection (K)(1) above.
Litter control.
Control of concrete truck washouts.
Assurance that on-site fueling facilities will adhere to applicable Federal and State regulations
concerning storage and dispensers.
Provision of sufficient temporary toilet facilities to serve the number of workers on site.
Section 420.060. Inspections.
[Ord. No. 1100 §VI, 3-20-2006]
The Department of Public Works shall make inspections as hereinafter required and either shall
approve that portion of the work completed or shall notify the permittee wherein the work fails to
comply with the grading, erosion and sediment control plan as approved. Plans for grading,
stripping, excavating and filling work bearing the stamp of approval of the Department of Public
Works shall be maintained at the site during the progress of the work. To obtain inspections, the
permittee shall notify the Department of Public Works at least two (2) working days before the
following:
Start of construction;
Installation of sediment and erosion measures;
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Completion of site clearing;
Completion of rough grading;
Completion of final grading;
Close of the construction season;
Completion of final landscaping.
The permittee or his/her agent shall make regular inspections of the land disturbance site,
including all erosion and sediment and other pollutant control measures, outfalls and off-site
receiving waters in accordance with the inspection schedule outlined in the approved SWPPP.
Inspections must be scheduled at least once per week and no later than seventy-two (72) hours
after heavy rain. The purpose of such inspections will be to ensure proper installation, operation
and maintenance of BMPs and to determine the overall effectiveness of the SWPPP and the need
for additional control measures. All inspections shall be documented in written form on weekly
reports with copies submitted to the Department of Public Works at the time interval specified in
the permit. The inspection reports are to include the following minimum information:
Inspector's name and signature;
Date of inspection;
Observations relative to the effectiveness of the BMPs;
Actions taken or necessary to correct deficiencies; and
A listing of areas where land disturbance operations have permanently or temporarily
stopped.
In addition, the permittee shall notify the site contractor(s) responsible for any
deficiencies identified so that deficiencies can be corrected within seven (7) calendar
days of the weekly inspection report.
The Department of Public Works shall make inspections as deemed necessary to ensure the
validity of the reports filed under Subsection (B) or to otherwise ensure proper installation,
operation and maintenance of stormwater BMPs and to determine the overall effectiveness of the
SWPPP and the need for additional control measures.
Section 420.070. Enforcement.
[Ord. No. 1100 §VII, 3-20-2006]
Stop Work Order — Revocation Of Permit. In the event that any person holding a site disturbance
permit pursuant to this Chapter violates the terms of the permit or implements site development in
such a manner as to materially adversely affect the health, welfare or safety of persons residing or
working in the neighborhood or development site so as to be materially detrimental to the public
welfare or injurious to property or improvements in the neighborhood, the Department of Public
Works may suspend or revoke the site disturbance permit.
Violation And Penalties. No person shall construct, enlarge, alter, repair or maintain any grading,
excavation or fill or cause the same to be done contrary to or in violation of any terms of this
Chapter. Any person violating any of the provisions of this Chapter shall be deemed guilty of a
misdemeanor and each day during which any violation of any of the provisions of this Chapter is
committed, continued or permitted shall constitute a separate offense. Upon conviction of any
such violation, such person, partnership or corporation shall be punished by a fine of not more
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than five hundred dollars ($500.00) for each offense. In addition to any other penalty authorized by
this Section, any person, partnership or corporation convicted of violating any of the provisions of
this Chapter shall be required to bear the expense of such restoration.
Project Closure Requirements. Any site development escrows or bonds will be not be fully
released to the site operator or permittee until all of the following have been completed:
All temporary stormwater control BMPs have been removed and the site has been fully
stabilized.
All permanent stormwater control BMPs have been completed.
All final inspections/certifications have been completed by each of the government
jurisdictions involved in authorizing the project.
Section 420.080. Guidance Manual for Construction and Land
Disturbance Activities — Stormwater Control Requirements.
Purpose. The purpose of this guidance manual is to provide direction to municipal officials and
staff for implementing the provisions of municipal ordinances pertaining to regulation of land
disturbance activities and related stormwater controls. This guidance will help promote efficient
plan reviews and processing of permit applications so as to benefit the community and to ensure
compliance with the terms of the City of Breckenridge Hills State issued MS4 NPDES permit.
Certain requirements of Section 4.2.4 of the MS4 permit, as referenced below, are addressed
within this guidance manual.
General Provisions. The Department of Public Works shall be responsible for enforcing the
provisions of the Grading, Erosion and Sediment Control Ordinance No. 1100. The Department of
Public Works shall review all permit applications submitted pursuant to that ordinance and shall
issue permits with such conditions as deemed appropriate to enable compliance with the grading
ordinance and other related ordinances. The Department shall conduct all required inspections of
permitted sites and shall be responsible for initiating enforcement actions when violations are
identified.
Persons who intend to disturb land within Breckenridge Hills will be reminded, at the time of initial
contact with municipal officials, of the need to obtain a separate land disturbance permit from the
Missouri Department of Natural Resources for any construction or land disturbance activity that
will result in disturbance of one (1) acre or more of land. Persons intending to disturb such
acreage must be informed that site work may not commence until the State permit has been
obtained. Any municipal permit, for sites one (1) acre or above, will also contain this requirement
as a permit condition.
Water Quality Considerations (See Section 4.2.4.2.4 Of The MS4 Permit). During review of site
plans, Storm Water Pollution Prevention Plans (SWPPP) and other documents submitted as part
of the permit application, Department staff shall consider the potential water quality impacts of the
project both during the construction/land disturbance phase and after site development is fully
complete. Department staff should consider the provisions within the Missouri Water Quality
Standards, the Missouri Impaired Waters list (303(d) list), the Federal Endangered Species Act,
the National Historic Preservation Act and proximity to water bodies identified by MDNR as
"Valuable Resource Waters" (see attached listing). To the maximum extent practicable under State
and local laws, the Department shall include such conditions in permits as are appropriate to
prevent or minimize impacts on water quality. Department staff shall solicit comments or advice,
when deemed appropriate, from the Missouri Department of Natural Resources, the Missouri
Department of Conservation, the Soil and Water Conservation District and such other State and
national regulatory bodies as may have expertise related to a specific project or area.
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Public Inquiries/Complaints (See Section 4.2.4.2.5 Of The MS4 Permit). The Department of Public
Works shall maintain a system for recording and tracking inquiries and complaints received from
the public regarding proposed and active land disturbance sites within Breckenridge Hills. The
following information shall be logged, on a standard form, for each inquiry/complaint:
Date;
Name, address and telephone number of the inquiring/complaining party;
Nature of inquiry/complaint, including all pertinent information related thereto; and
Follow up action. If an inspection is performed, all information regarding the date and time,
inspector's name, findings and any mitigation or enforcement actions initiated shall be
recorded.
All inquiries or complaints must be logged. However, it is up to the sole discretion of the
Department of Public Works, with such consultation with other departments or agencies
as may be deemed appropriate, as to whether any follow up action is deemed
appropriate. If no follow up action is deemed necessary, a short explanation shall be
recorded on the standard inquiry form.
Inspections/Reports (See Section 4.2.4.2.6 Of The MS4 Permit). The Department of Public Works
shall inspect each permitted site at the frequency as necessary to insure compliance with this
Chapter and to follow up on public inquiries/complaints or to follow up on previously identified
deficiencies. The results of all inspections shall be recorded in written reports and maintained in
the project file. Inspections shall be carried out in such a way as to determine whether the site
operator is complying with all provisions of the City of Breckenridge Hills permit.
Department staff shall ensure receipt of all site operator notifications and site operator self-
inspections as required by the permit. Staff shall take such follow up actions as may be deemed
necessary based on the content of received notifications and reports.
Transfer Of Ownership — Individual Lot Or Lots. City of Breckenridge Hills ordinances require a
permit, as well as controls for sediment, erosion and other construction site pollutants for disturbed
areas of land in excess of twelve thousand (12,000) square feet disturbed as part of a common
plan or sale. That language means the lot(s) when sold to an entity for construction (unless sold to
an individual for purposes of building their own private residence) are also subject to ordinance
requirements because they are part of the common sale. A current permittee who intends to
transfer ownership of a lot or parcel of the overall permitted area is still responsible for the terms of
the Breckenridge Hills permit and the SWPPP and erosion control on that site unless the new
owner applies for and receives a separate permit for land disturbance activities. If the current
permittee is to retain the permit and responsibility for control of sediment and other pollutants at
the site, then the owner should obtain a copy of an Individual Lot Certification (ILC) from the lot
owner(s). The ILC should be properly completed and signed and retained with the SWPPP.
Entire tract. If the entire tract is sold to a single entity, then the Breckenridge Hills permit shall be
terminated and the new owner shall submit an application for a new permit immediately.
Reference Sources. The staff will provide every permit applicant with the following list of reference
and guidance documents which may be employed in development of the SWPPP. For activities
requiring State land disturbance permits, the first two (2) documents listed are considered
mandatory references for all applicants.
"Storm Water Management for Construction Activities — Developing Pollution Prevention Plans
and Best Management Practices" September 1992 — United State Environmental Protection
Agency Office of Water, EPA 832-R-92-005.
"Protecting Water Quality — A field guide to erosion, sediment and stormwater best management
practices for development sites in Missouri and Kansas" September 1998 — Prepared by the St.
Charles County Soil and Water Conservation District, St. Charles, Missouri, the Dam and
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Reservoir Safety Program, Division of Geology and Land Survey, Missouri Department of Natural
Resources, Rolla, Missouri.
"Urban Conservation Policy Handbook" June 1998 — The Mid-America Association of
Conservation Districts, the Missouri Department of Natural Resources, the United States
Environmental Protection Agency Region VII.
"Missouri Standards and Specifications for Highway Construction" 1999 or latest edition —
Missouri Highways and Transportation Commission.
"Standard Construction Specifications for Sewers and Drainage Facilities" 2000 or latest edition —
Metropolitan St. Louis Sewer District.
"Rules and Regulations and Engineering Design Requirements for Sanitary Sewage and
Stormwater Drainage Facilities" February 1997 or latest edition — Metropolitan St. Louis Sewer
District.
"Standards Specification for Highway Construction" — St. Louis County Department of Highways
and Traffic.
"Design Criteria Book for the Preparation of Improvement Plans" March 1, 2000 (Stormwater
Design 50.10 to 50.60) — St. Louis County Department of Highways and Traffic.
Listing Of Missouri Valuable Resource Waters. The Missouri Department of Natural Resources
imposes additional requirements in State land disturbance permits for sites from which stormwater
will discharge to "valuable resource waters". The following table identifies water bodies defined as
"Valuable Resource Waters" in MDNR General Permit MO-R109000 and the distances from such
water bodies within which additional permit requirements apply:
Valuable Resource Waters
Water Body*
Permit MO-R109000 conditions apply if
discharges from a land disturbance site are
within the following distances from the
water body
Losing stream 1,000 feet
Outstanding national or State resource water 1,000 feet
Class L1 lakes or reservoirs used for public
drinking water supply
1,000 feet
Water body identified as critical habitat for
endangered species
1,000 feet
Class P stream 100 feet
Class L2 reservoir 100 feet
Biocriteria reference locations 2 miles upstream
Class W (Wetland that meets the criteria in the
Corps of Engineers Delineation Manual
(January 1987))
On site
Ground water Discharge to a sinkhole or other direct conduit
to ground water
*See listings in Missouri Water Quality Standards 10 CSR 20-7.031.