Resolutions-1997-021

7.07 BEDDING AND BACKFILL A. All D.I.P. mains 12 inch and larger shall be bedded in crushed stone to a depth of one-half the pipe diameter. See jurisdictional construction specifications for type of crushed stone. B. All other pipe shall be bedded in accordance with manufacturer's recommendations. C. Within public right-of-way, backfill shall consist of Class A crushed stone or suitable job excavated material placed in one foot lifts compacted to 90% Modified Proctor Density. City Engineer to determine where each is to be utilized. If crushed stone is used, the top 12 inches of backfill shall consist of suitable job excavated materials. Plowable mortar may be used upon approval of mix design by the City. Sand backfill is not permitted. D. In all other areas backfill shall consist of suitable job excavated material placed in one foot lifts and compacted to 85% Modified Proctor Density. 7.08 PERFORMANCE AND TESTING A. Testing shall be performed under the supervision of the City's designated representative, or as otherwise directed by the City Engineer. B. Bacterial test for coliform organisms shall be performed by the contractor in accordance with AWWA C601. A minimum free residual chlorine concentration of 10mg/l shall be maintained for the 24-hour disinfection period. The contractor shall provide documentation of bacterial tests from a certified laboratory. C. Pressure and leakage test in accordance with AWWA C600. D. Valves shall be located and tested to verify operation. E. Fire hydrants shall be tested to verify operation. F. Flow tests shall be conducted to verify that all components of the water system are fully open and operational and to determine fire flow capacity. 7.09 LOCATION OF EASEMENTS A. All public water mains should be located within the public right-of-way. In rare exceptions, dedicated easements may be used for location of water main outside of public right-of-way. B. To limit damage to structures in the event of a main break, water mains shall be placed a minimum distance of 1.5 times the depth from building setback lines. Greater separations are desirable. C. All water mains outside public right-of-way shall be placed in an easement for operation and maintenance. Easement width from the center of the pipe shall generally be 1.0 times the pipe depth rounded up to the nearest 5 feet.