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THE METROPOLITAN ST, LOUIS SEWER DISTRICT Iv' SI' RULES AND REGULATIONS AND ENGINEERING DESIGN REQUIREMENTS FOR SANITARY SEWER AND STORMWATER DRAINAGE FACILITIES FEBRUARY 2006 Revised 10/15/12 2 RULES AND REGULATIONS AND ENGINEERING DESIGN REQUIREMENTS FOR SANITARY SEWER AND STORMWATER DRAINAGE FACILITIES FEBRUARY 2006 TABLE OF CONTENTS 1. GENERAL .............................................................................................................................................................. 10 1.010 Projects Requiring Review By the District............................................................................................... 10 1.020 Regulations Governing the Use of Public and Private Sewerage Facilities ........................................... 10 1.020.01 Unlawful Discharges and Sewage Disposal ...................................................................................... 10 1.020.02 Public Sewer Available ....................................................................................................................... 10 1.020.03 Public Sewer Not Available ................................................................................................................ 10 1.020.04 Prohibited Discharges and Waste Disposal Into Sanitary Sewers .................................................. 11 1.020.05 Wastes Having Excessive Biochemical Oxygen Demand (B.O.D.), ................................................. 11 1.020.06 Measurements, Tests or Analyses ...................................................................................................... 12 1.020.07 Furnishing Records ............................................................................................................................. 12 1.030 Submission, Review and Approval of Plans and Specifications ............................................................... 12 1.040 Procedures..................................................................................................................................................... 13 1.040.01 Preliminary Conferences .................................................................................................................... 13 1.040.02 Required Submittals by the Engineer ............................................................................................... 13 1.040.03 Subdivisions ......................................................................................................................................... 14 1.040.04 Projects Normally Requiring a Sewer Connection - Permit Only .................................................. 14 1.040.05 Return of Plans Without Review ....................................................................................................... 15 1.040.06 Return of Plans for Revision .............................................................................................................. 15 1.040.07 Failure to Revise or Correct Plans Promptly ................................................................................... 15 1.040.08 Fees for Review ................................................................................................................................... 15 1.050 Plan Requirements ....................................................................................................................................... 15 1.050.01 Drawing Sizes ...................................................................................................................................... 15 1.050.02 Plans Submitted Shall Include: .......................................................................................................... 15 1.060 Storm Drainage Design Data, Maps and Computation ............................................................................. 16 1.060.01 General Criteria:................................................................................................................................. 16 1.060.02 Basic Design Data To Include: ........................................................................................................... 17 1.070 Sanitary Sewer Design Data, Maps and Computations ............................................................................ 17 1.070.01 General Criteria:................................................................................................................................. 17 1.070.02 Basic Design Data To Consider: ........................................................................................................ 17 2. DEFINITIONS ....................................................................................................................................................... 18 3. DESIGN REQUIREMENTS FOR SANITARY SEWERS ................................................................................ 23 3.010 General .......................................................................................................................................................... 23 3.020 General Requirements of Sanitary Sewer Construction ........................................................................... 23 3.020.01 Size and Shape ..................................................................................................................................... 23 3.020.02 Materials ............................................................................................................................................. 23 Revised 10/15/12 3 3.020.03 Bedding ................................................................................................................................................ 23 3.020.04 Pipe or Conduit Under Streets and Pavements ................................................................................ 24 3.020.05 Joints ................................................................................................................................................... 24 3.020.06 Monolithic Structures ......................................................................................................................... 24 3.020.07 Alignment ........................................................................................................................................... 24 3.020.08 Location .............................................................................................................................................. 24 3.020.09 Flowline ................................................................................................................................................ 25 3.020.10 Manholes ............................................................................................................................................. 25 3.020.11 Sewage Treatment Facilities .............................................................................................................. 26 3.030 Design Requirements .................................................................................................................................... 27 3.030.01 General................................................................................................................................................. 27 3.030.02 Gradients ............................................................................................................................................ 27 3.030.03 Depth and Minimum Cover .............................................................................................................. 27 3.030.04 Flow Design ........................................................................................................................................ 28 3.030.05 Population Factors ............................................................................................................................. 28 3.030.06 Sanitary Flow Table .......................................................................................................................... 28 3.030.07 Hydraulic Grade Line........................................................................................................................ 29 1. Hydraulic Grade Line Limits ................................................................................................................. 29 2. Computation Methods ............................................................................................................................. 29 a. Friction Loss ......................................................................................................................................... 29 b. Curve Loss ............................................................................................................................................ 30 c. Turn Loss .............................................................................................................................................. 30 d. Junction Chamber Loss ......................................................................................................................... 31 e. Losses at Junctions of Several Flows in Manholes ............................................................................... 32 f. Transition Loss ..................................................................................................................................... 33 (1) Closed Conduits ............................................................................................................................... 33 3.030.08 Infiltration .......................................................................................................................................... 34 3.030.09 Special Situations and Design Requirements ................................................................................... 34 l. Connections to Manholes ........................................................................................................................ 34 2. Adjusting Manholes to Grade................................................................................................................. 35 3. Swimming Pools ....................................................................................................................................... 35 4. Storm Sewers Crossing Over Sanitary Sewers ..................................................................................... 35 5. Location in Conjunction with Water Service ........................................................................................ 35 6. Sanitary Sampling Appurtenance .......................................................................................................... 35 7. Abandonment of Sanitary Sewer Services ............................................................................................. 36 8. Private Force Main Connections ............................................................................................................ 36 9. Oil/Gas Separators, Sand Filters, and Grease Traps............................................................................ 36 10. Coldwater Creek Gravity Elevation .................................................................................................. 36 11. Common Laterals ................................................................................................................................ 37 12. Private Lateral .................................................................................................................................... 37 13. Separate Laterals and Sewers ............................................................................................................ 37 14. Protection from Surcharging ............................................................................................................. 38 15. Residential Basement Garage Flooding ............................................................................................ 38 16. Lateral for Commercial Use ............................................................................................................... 38 3.040 Sanitary Detention Requirements ............................................................................................................... 38 3.040.01 Surcharged Sanitary Sewers ............................................................................................................. 38 4. DESIGN REQUIREMENTS FOR STORM DRAINAGE FACILITIES .......................................................... 42 4.010 General ............................................................................................................................................................. 42 4.020 General Requirements of Storm Sewer Construction .................................................................................. 42 4.020.01 Size and Shape .................................................................................................................................... 42 4.020.02 Materials ............................................................................................................................................. 42 Revised 10/15/12 4 4.020.03 Bedding ............................................................................................................................................... 42 4.020.04 Concrete Pipe or Conduit Strengths ................................................................................................. 42 4.020.05 Monolithic Structures ......................................................................................................................... 43 4.020.06 Alignment ............................................................................................................................................ 43 4.020.07 Location .............................................................................................................................................. 43 4.020.08 Sinkhole Areas .................................................................................................................................... 44 1. Sinkhole Report ....................................................................................................................................... 44 2. Procedure for Utilization of Sinkholes ................................................................................................... 45 4.020.09 Flowline ............................................................................................................................................... 45 4.020.10 Manholes ............................................................................................................................................. 46 4.020.11 Overflow/Design System .................................................................................................................... 47 4.030 Stormwater Design Criteria ........................................................................................................................ 47 4.030.01 Flow Quantities .................................................................................................................................. 47 1. Rainfall Frequency .................................................................................................................................. 48 2. Impervious Percentages and Land Use .................................................................................................. 48 3. Reduction in P.I. with Time and Area ................................................................................................... 49 4.030.02 Hydraulic Grade Line for Closed Conduits .................................................................................... 50 1. Computation Methods ............................................................................................................................. 50 a. Friction Loss ......................................................................................................................................... 50 b. Curve Loss ............................................................................................................................................ 51 c. Entrance Loss at Terminal Inlets ........................................................................................................... 51 d. Turn Loss .............................................................................................................................................. 51 e. Junction Chamber Loss ......................................................................................................................... 52 f. Losses at Junctions of Several Flows in Manholes and/or inlets 53 g. Transition Loss ..................................................................................................................................... 54 (1) Closed Conduits ............................................................................................................................... 54 (2) Open Channel Transitions ................................................................................................................ 55 4.030.03 Hydraulic Grade Line Limits ............................................................................................................ 55 4.030.04 Inlets .................................................................................................................................................... 56 4.030.05 Open Channels ................................................................................................................................... 57 1. Size and Shape ......................................................................................................................................... 57 2. Materials................................................................................................................................................... 57 3. Bedding ..................................................................................................................................................... 58 4. Structural Considerations ....................................................................................................................... 58 5. Alignment ................................................................................................................................................. 58 6. Locations .................................................................................................................................................. 58 7. Flowline .................................................................................................................................................... 58 8. Other Open Channel Considerations and Requirements ..................................................................... 58 9. Design Limitations ................................................................................................................................... 59 10. Hydraulic Grade Line......................................................................................................................... 59 a. Computation Methods ........................................................................................................................... 59 (1) Control Sections ............................................................................................................................... 60 (2) Friction Loss .................................................................................................................................... 60 (3) Flow in Curved Channels ................................................................................................................. 60 (a) Curve Losses ............................................................................................................................... 60 (b) Superelevations ........................................................................................................................... 60 (4) Transitions ........................................................................................................................................ 61 (a) Proportioning ............................................................................................................................... 61 (b) Losses .......................................................................................................................................... 61 (c) Freeboard .................................................................................................................................... 62 (d) Hydraulic Jump ........................................................................................................................... 62 (e) Sudden Enlargement and Contraction ......................................................................................... 62 (5) Constrictions .................................................................................................................................... 63 (6) Obstructions ..................................................................................................................................... 63 b. Hydraulic Grade Line Limits ................................................................................................................ 63 Revised 10/15/12 5 11. Hydraulic Jump .................................................................................................................................. 63 12. Open Channel Junctions .................................................................................................................... 63 a. General .................................................................................................................................................. 63 b. Confluence Design Criteria ................................................................................................................... 63 13. Erosion Protection .............................................................................................................................. 64 14. Sanitary Sewer Crossings ................................................................................................................... 64 4.030.06 Culverts ............................................................................................................................................... 64 1. Hydraulic Design ..................................................................................................................................... 64 2. Entrances and Headwalls - Outlets and Endwalls ................................................................................ 64 4.040 Bridges ........................................................................................................................................................... 64 4.040.01 Waterway Capacity and Backwater Effects .................................................................................... 64 4.040.02 Clearance ............................................................................................................................................ 65 4.040.03 Waterway Alignment ......................................................................................................................... 65 4.040.04 Erosion Protection ............................................................................................................................. 65 4.050 Outlet Erosion Protection ............................................................................................................................ 65 4.060 Limitations on Areas Draining Across Sidewalks or Driveways ............................................................. 65 4.070 Impervious Areas - In City of St. Louis ...................................................................................................... 65 4.080 General Performance Criteria for Stormwater Management ................................................................. 65 4.080.01 When Required .................................................................................................................................. 65 4.080.02 Unified Stormwater Sizing Criteria ................................................................................................. 67 1. General ..................................................................................................................................................... 67 2. Water Quality Volume (WQ v ) ................................................................................................................ 67 3. Channel Protection Storage Volume Requirements (Cp v ) ................................................................... 68 4. Flood Protection Volume Requirement (Q p2 & Q p100 ) .......................................................................... 70 4.080.03 Limits of Maximum Ponding in Stormwater Ponds ....................................................................... 71 4.080.04 General Stormwater Basin Design Requirements .......................................................................... 72 4.080.05 Acceptable Urban BMP Options ...................................................................................................... 74 1. BMP Group 1. Stormwater Ponds ......................................................................................................... 75 2. BMP Group 2. Stormwater Wetlands.................................................................................................... 75 3. BMP Group 3. Infiltration Practices ..................................................................................................... 76 4. BMP Group 4. Filtering Practices .......................................................................................................... 76 5. BMP Group 5. Open Channel Practices ................................................................................................ 76 4.080.06 Stormwater Credits ........................................................................................................................... 76 4.080.07 Easement Required ............................................................................................................................ 77 4.080.08 Maintenance Agreement ................................................................................................................... 77 4.090 Dam Permit Requirements .......................................................................................................................... 77 4.100 Detention Report .......................................................................................................................................... 77 EXHIBIT 4-A .............................................................................................................................................................. 78 Check List for Review of Stormwater Detention ................................................................................................ 78 5. FLOOD PLAIN REQUIREMENTS .................................................................................................................... 91 5.010 Flood Plain Study/100 – Year Hydraulic Study ......................................................................................... 91 5.010.01 When Required .................................................................................................................................. 91 5.010.02 Criteria For Preparation ................................................................................................................... 91 5.010.03 Filling in Flood Plain Areas .............................................................................................................. 93 5.010.04 Detention Basins in Flood Plains ...................................................................................................... 93 5.010.05 Bridges in Flood Plains ...................................................................................................................... 93 Revised 10/15/12 6 5.010.06 Parking Lots in Flood Plains ............................................................................................................. 93 5.010.07 Site Plan Requirements ..................................................................................................................... 94 6. RECOUPMENT RULES AND REGULATIONS ............................................................................................... 95 6.010 General .......................................................................................................................................................... 95 6.020 Contract Between District and Owner(s) ................................................................................................... 95 6.030 Recoupment Provisions ................................................................................................................................ 95 6.040 Recoupment Procedures and Project Costs ............................................................................................... 95 6.050 Objections to Certified Completed Construction Costs ............................................................................ 95 6.060 Recoupment Fees .......................................................................................................................................... 95 6.070 Areas Served by More Than One Sewer Facility Under Recoupment .................................................... 96 6.080 Connection to Recoupment Sewer Facility................................................................................................. 96 6.090 Reports of Owner of Sewer Facility ............................................................................................................ 96 6.090.01 Annual .................................................................................................................................................. 96 6.090.02 Interim ................................................................................................................................................. 96 6.100 Extent of and Time Limits of Recoupment ................................................................................................. 96 7. EASEMENTS ......................................................................................................................................................... 97 7.010 General .......................................................................................................................................................... 97 7.020 Use of Existing Easements ........................................................................................................................... 97 7.030 Location of Easements ................................................................................................................................. 97 7.040 Width of Easements ...................................................................................................................................... 97 7.050 Wording of Easements ................................................................................................................................. 97 7.060 Easement Plat Preparation Information Guidelines ................................................................................. 97 7.060.01 Label Established Lines Affecting Tract and/or Mentioned in its Legal Description: ................ 97 7.060.02 Identify Parcel or Tract: ................................................................................................................... 98 7.060.03 Provide Accurate Title Box Information: ........................................................................................ 98 7.060.04 Easement Plat Drafting Guidelines ................................................................................................... 98 7.070 Vacation of Easements ................................................................................................................................. 99 7.080 Easement Encroachment............................................................................................................................ 100 7.090 Indemnity Agreement ................................................................................................................................. 101 8. APPROVAL AND DEDICATION OF PROJECTS WITH PUBLIC SEWERS ........................................... 102 8.010 General ........................................................................................................................................................ 102 Revised 10/15/12 7 8.020 Requirements for Plan Approval and Issuance of Permits ..................................................................... 102 8.020.01 Agreement to Dedicate .................................................................................................................... 102 8.020.02 Construction Escrow Deposit and Cash Deposit Agreement ....................................................... 102 8.020.03 Conditional Plan Approval ............................................................................................................. 102 8.030 Requirements for Construction Approval ................................................................................................ 103 8.030.01 Construction Inspection .................................................................................................................. 103 8.030.02 Field Changes and Plan Revisions ................................................................................................... 103 8.030.03 As-Built Drawings ............................................................................................................................ 103 1. Storm, Sanitary and Combined Sewers ............................................................................................... 104 2. Detention Basin ...................................................................................................................................... 104 3. Pump Station Construction................................................................................................................... 104 4. Subdivision Plats .................................................................................................................................... 105 5. Geotechnical Engineer's Certification ................................................................................................. 105 6. State Plane Coordinates ........................................................................................................................ 105 a. Horizontal Data ................................................................................................................................... 105 b. Vertical Data ....................................................................................................................................... 105 c. Deliverables ........................................................................................................................................ 105 8.030.04 Notification of Construction Approval .......................................................................................... 106 8.040 Dedication and Release of Construction Escrow ..................................................................................... 107 8.040.01 Residential and Commercial Subdivisions, Apartments and Condominiums .............................. 107 8.040.02 Sewer Extensions and Single Lot Developments ............................................................................ 108 8.040.03 Dedication Inspection Fees .............................................................................................................. 108 8.050 Pump Stations ............................................................................................................................................. 108 8.060 Abandonment of Work .............................................................................................................................. 109 9. FEES AND DEPOSITS REQUIRED BEFORE PLAN APPROVALAND ISSUANCE OF CONSTRUCTION PERMITS ................................................................................................................................. 110 9.010 Fees Required Before Plan Approval ....................................................................................................... 110 9.010.01 Submittal Fee .................................................................................................................................... 110 9.010.02 Review Fee ........................................................................................................................................ 110 9.010.03 Connection and System Development Fees .................................................................................... 110 9.010.04 Recording Fees ................................................................................................................................. 110 9.020 Deposits Required Before Issuance of Construction Permits ................................................................. 110 9.020.01 As-Built Deposit ............................................................................................................................... 111 9.020.02 Construction Deposit ....................................................................................................................... 111 9.020.03 Pump Station Escrow Deposit ......................................................................................................... 111 9.020.04 Conditional Plan Approval Deposit................................................................................................ 111 10. CONSTRUCTION PERMITS .......................................................................................................................... 112 10.010 General ........................................................................................................................................................ 112 10.010.01 Permits Required ............................................................................................................................. 112 10.010.02 Defaults ............................................................................................................................................. 112 10.020 Permittee ..................................................................................................................................................... 112 10.030 Performance Bond ...................................................................................................................................... 112 10.040 Construction and Connection Permit and Fees ....................................................................................... 113 Revised 10/15/12 8 10.040.01 Connection Permit and Fee .............................................................................................................. 113 10.040.02 Construction Permit and Fee ........................................................................................................... 113 10.040.03 Machine Tap Permit and Fee ........................................................................................................... 113 10.050 Inspection Fee Deposit ............................................................................................................................... 114 10.060 Expiration and Extension of Permits and Approved Plans .................................................................... 114 10.060.01 Approved Plans ................................................................................................................................ 114 10.060.02 Construction and Connection Permits ........................................................................................... 114 10.070 Cancellation of Permits and Refunds of Fees and Deposits .................................................................... 114 10.070.01 Prior to the Start of Work ............................................................................................................... 114 10.070.02 After the Start of Work ................................................................................................................... 114 10.070.03 Connection Permits .......................................................................................................................... 115 10.080 Final Determination of Construction Inspection Fees ............................................................................. 115 10.090 Minimum Insurance Requirements for Off Site Construction ............................................................... 115 10.090.01 Comprehensive Automobile Liability: ........................................................................................... 117 10.090.02 Commercial General Liability (occurrence from): ....................................................................... 117 10.090.03 Cancellation ...................................................................................................................................... 118 11. INSPECTION .................................................................................................................................................... 119 11.010 General ........................................................................................................................................................ 119 11.020 Privately Constructed Sewers and Treatment Facilities ......................................................................... 119 11.030 Maintenance and Operation Inspection ................................................................................................... 119 11.040 Fees .............................................................................................................................................................. 119 11.050 Inspection ................................................................................................................................................... 119 12. REGULATION AND CORRECTION OF IMPROPER PRIVATE SEWER FACILITIES ..................... 120 12.010 General ........................................................................................................................................................ 120 12.020 Notification to Owner................................................................................................................................. 120 12.030 Expiration of Period Without Work Being Done .................................................................................... 120 12.040 District to Proceed with Work................................................................................................................... 120 12.050 Cost of Work - A Lien ................................................................................................................................ 120 12.060 Appeal from Decision to Proceed with Work ........................................................................................... 120 13. SEWAGE PUMPING STATIONS ................................................................................................................... 121 13.010 General ........................................................................................................................................................ 121 13.020 Pump Station Plan Review Procedure ...................................................................................................... 121 13.020.01 Design Report .................................................................................................................................... 121 13.020.02 Design Drawings .............................................................................................................................. 121 Revised 10/15/12 9 13.020.03 Required Submittal .......................................................................................................................... 122 13.030 Low Pressure Sewer Systems (LPSS) ....................................................................................................... 122 13.030.01 General............................................................................................................................................... 122 13.030.02 LPSS Plan Review Procedure ......................................................................................................... 122 1. Low Pressure Sewer System Design Report: ....................................................................................... 122 2. Design Drawings: ................................................................................................................................... 122 13.030.03 Required Submittal ........................................................................................................................... 122 14. APPENDIX – VOLUMETRIC METHOD 15. RESERVED (FOR FUTURE INDEX)