Resolutions-1997-021

inch pipe. A private fire hydrant is the responsibility of the property owner and is to be used for fire protection only. Where it is the owner's intention that these hydrants be used by the City Fire Department, these hydrants shall conform to the Department of Public Works specifications for fire hydrants. The City has the right to utilize the hydrants for flushing purposes. 7.04 CONSTRUCTION SPECIFICATIONS A. Construction must comply with these City Design Standards and the Iowa Department of Natural Resources standard construction specifications for water distribution facilities. 7.05 SYSTEM DESIGN A. Size: All mains shall be a minimum of 8 inches in diameter. The City Engineer shall establish a network of main sizes to provide a system for fire flows and water system demand within the community. If larger sized mains are required by the City Engineer, the developer shall pay for the cost of all mains and appurtenances up to and including a 12 inch diameter main. Main sizes greater than a 12 inch diameter will be paid by the city for the increase in material cost only. B. Depth: Water main shall be installed with a minimum depth of cover of 6-feet from the top of the pipe. Generally, the maximum depth shall not exceed 7 feet. C. Alignment: 1. All mains shall be looped, except for short runs to serve cul-de-sacs where the distance is less than 300 feet. 2. Water mains shall be constructed such that no services shall be extended beneath the paving of the circular turnaround on cul-de-sacs. 3. Water distribution mains will be extended to and through or across the frontage of all subdivisions and land development projects. Provisions will be made to connect water mains to serve future adjacent undeveloped land. 4. Water mains will be located so the front of each property has access for a service connection. D. Changes in Alignment: 1. Thrust restraints are required at all changes in alignment exceeding 10 degrees at all dead ends and on fire hydrants. Thrust restraints shall be constructed as shown in Figure 7.1. Wrap pipes and fittings in plastic before pouring thrust blocks. 2. The maximum deflection at joints shall not exceed the pipe manufacturer's recommendations.