minimum design & construction standards - Martin County, Florida

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Installation of reclaimed water pipe and associated fittings shall be in accordance with current AWWA specifications and manufacturers requirements for their particular products. Mechanical restraint shall be required at each fitting involving a change of direction and as specified in plan details. All pipe shall be laid in trenches having a dry and stable bottom. Backfill shall be clean suitable fill. Pipe shall be fully supported along its entire length. Sharp or rocky material encountered in the base shall be replaced with proper bedding. Pipe shall be laid on line and grade as designed. 2. Backflow Prevention/Cross Connection Control There shall be no physical connection between a safe water supply and a questionable water supply, a reclaimed water supply, or a sanitary or storm sewage system which would allow unsafe water to enter the safe water system by direct pressure, vacuum, gravity or any other means. All potable water services within sewage facilities shall be provided with an approved backflow prevention device. See Section XV, Manual of Cross Connection Control and Backflow Prevention. 3. Minimum Cover Minimum cover to finished grade over reclaimed water mains shall be 30 inches up to 8" diameter; 10" or larger shall have 48" cover. 4. Parallel/Horizontal Separation Sanitary sewers, force mains, reclaimed water mains and storm sewers should cross under potable water mains whenever possible. Sanitary sewers, force mains, reclaimed water mains and storm sewers crossing water mains shall be laid to provide a minimum vertical distance of 18 inches between the invert of the upper pipe and the crown of the lower pipe whenever possible. Where sanitary sewers, force mains, reclaimed water mains and storm sewers must cross a water main with less than 18 inches vertical distance, both the sewer and the water main shall be constructed of ductile iron pipe (DIP) at the crossing. (Storm sewers are not required to be DIP.) Sufficient lengths of DIP must be used to provide a minimum separation of 10 feet between any two joints. All joints on the water main within 20 feet of the crossing must be mechanically restrained. A minimum vertical clearance of 8 inches must be maintained at all crossings. All crossings shall be arranged so that the sewer pipe joints and the water main pipe joints are equidistant from the point of crossing (pipes centered on the crossing). Where a new pipe conflicts with an existing pipe with less than 18 inches vertical clearance, the new pipe shall be constructed of DIP (except storm sewers) and the new pipe shall be arranged to meet the crossing requirements above. 47
A minimum 5 foot horizontal separation, pipe center to pipe center with a minimum 3 foot pipe wall to pipe wall shall be maintained between any type of sewer and reclaimed water main in parallel installations whenever possible. In cases where it is not possible to maintain a 5 foot horizontal separation, the reclaimed water main must be laid in a separate trench or on an undisturbed earth shelf located on one side of the sewer or force main at such an elevation that the bottom of the reclaimed water main is at least 18 inches above the top of the sewer. Where it is not possible to maintain a vertical distance of 18 inches in parallel installations, the reclaimed water main shall be constructed of DIP and the sewer or the force main shall be constructed of DIP (except storm sewers) with a minimum vertical distance of 12 inches. The reclaimed water main should always be above the sewer. Joints on the reclaimed water main shall be located as far apart as possible from joints on the sewer of force main (staggered joints). All DIP shall be Pressure Class 350 or higher. Adequate protective measures against corrosion shall be as determined by the design engineer and the Department. Horizontal separation of 15 feet to buildings, top of banks of lakes and canals and other structures shall be maintained, if possible. An absolute minimum of 10 feet may be allowed only when unavoidable and only with DIP. 5. Layout Permanent dead ends will not be approved unless they are reasonably unavoidable. Dead ends shall be equipped with a blow-off for flushing purposes. Temporary dead-ends shall have a gate valve with a mechanical joint plug. The gate valve shall be mechanically restrained for two full joints of pipe. Reclaimed water mains should be placed in right-of-way whenever possible. Placement of the water main on or adjacent to interior property lines or between structures is discouraged and will be approved only when unavoidable or when necessary for looping. 6. Reclaimed Water Main Material PVC reclaimed water mains 4 inch to 12 inch diameter (4" - 12") shall be DR-18 manufactured to ductile iron pipe outside dimensions and in compliance with AWWA Standard C900. The pipe shall have an integral bell end and gasket seal with the joint in compliance with the requirements of ASTM D3139. The pipe color along with all associated appurtenances shall be Purple Pantone 522. Smaller diameter service lines (1/2” through 3”) shall be Polyethylene Pressure Pipe and Tubing or PVC (schedule 40) and shall be manufactured in compliance with ANSI/AWWA C901, PE 3408, PC 200 and DR9. The pipe color shall be Purple Pantone 522 or co-extruded Purple Pantone 522 color stripes. 48
Page 1 and 2: MINIMUM DESIGN & CONSTRUCTION STAND
Page 3 and 4: 10. Manholes 23 11. Inspection and
Page 5 and 6: 4. Water Source 72 5. Preparation o
Page 7 and 8: ) Location of Easements Easements s
Page 9 and 10: SECTION II - DESIGN GUIDELINES The
Page 11 and 12: 1. Design SECTION III - POTABLE WAT
Page 13 and 14: Horizontal separation of 15 feet to
Page 15 and 16: Gate valves shall be ductile iron,
Page 17 and 18: Hydrants shall be placed within 15
Page 19 and 20: 2) Intermediate Series 66 Epoxoline
Page 21 and 22: B) Any pavement cut shall be replac
Page 23 and 24: C) Preconstruction Meeting: Upon ap
Page 25 and 26: SECTION IV - SEWAGE SYSTEMS AND GRA
Page 27 and 28: Sewer mains shall be laid accuratel
Page 29 and 30: Adjustment to proper grade shall be
Page 31 and 32: The sewer main, house laterals and
Page 33 and 34: Joints for ductile iron pipe shall
Page 35 and 36: AWWA C-500, latest revision. Valves
Page 37 and 38: to provide advance notification of
Page 39 and 40: 12. Horizontal Directional Drilling
Page 41 and 42: SECTION VI - SEWAGE PUMPING STATION
Page 43 and 44: TNEMEC 1) Primer: TNEME-ALUMINUM MA
Page 45 and 46: panel's control circuitry, shut dow
Page 47 and 48: eceptacle shall be used as manufact
Page 49 and 50: ) Radio. and the floats will contro
Page 51: 1. General SECTION VII - RECLAIMED
Page 55 and 56: Coat: Urethane or equal (2.0 to 3.0
Page 57 and 58: 9. Reclaimed Water Service Lines an
Page 59 and 60: shopping centers, Developer's Engin
Page 61 and 62: for sizes 12” diameter through 16
Page 63 and 64: controller/display panel. The Depar
Page 65 and 66: • Level sensing devices require a
Page 67 and 68: 1. General Section VIII Pressurized
Page 69 and 70: 3. Reuse Water Sensor a) Sensor Sel
Page 71 and 72: 4. Automatic Control Valve The Auto
Page 73 and 74: SECTIONS IX, X RESERVED FOR FUTURE
Page 75 and 76: A. Water, Force, and Reclaimed Wate
Page 77 and 78: 1. Scope SECTION XII - SODDING The
Page 79 and 80: emoved from the work. 8. Watering T
Page 81 and 82: A. WATER 1. FIRE HYDRANTS SECTION X
Page 83 and 84: 11. CORPORATIONS 1. Ford 1" FB1000G
Page 85 and 86: 2. American Flow Control Series 250
Page 87 and 88: 5. Clow F 5345 6. MECHANICAL JOINT

minimum design & construction standards - Martin County, Florida

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