Pipes. 17 Developer shall design storm drain pipes with a minimum velocity of 3 fps when flowing full, for 18 "self cleaning" purposes using the appropriate design flow. Developer shall design all storm 19 drains to sustain all loads using fill heights and D-loads for determining pipe classifications. 20 Developer shall design pipes in accordance with the following requirements: 21 A. Pipe diameter: 18 inches minimum 22 B. Pipe depth of cover: 6 inches minimum (top of pipe to bottom of finished subgrade) 23 C. Provide outfall protection when the outlet velocity is greater than 1.4 times the natural 24 stream velocity 25 D. When outfall protection is required, Developer shall provide calculations to document the 26 design.
Appears in 2 contracts
Sources: Design Build Maintain Agreement, Design Build Maintain Agreement