Resolutions-1997-021

D. Location Criteria: 1. Storm water detention is not allowed within any front or side yard setbacks required by building code, or within 25 feet from the estimated back building line. 2. Regional storm water management facilities are encouraged and may be required. 3. Regional storm water management facilities that are of sufficient size may be deeded to and maintained by the City. The conditions for City ownership will be reviewed on a case by case basis. E. Design Considerations 1. Dry-bottomed detention facilities shall be oversized by 10% to help offset anticipated sedimentation prior to total watershed development. 2. Maximum side slopes of dry bottom facilities shall not exceed 3.5:1. 3. Low flow pipes are required to convey low flows from storm sewer outlets to the detention facility outlet structure. Low flow pipes shall be a minimum of 12 inches in diameter unless it can be shown that the bottom of the detention facility will remain dry. Low flow pipes shall be slotted and bedded in freely draining aggregate. Alternate methods of subsurface drainage may be proposed. F. Dry Hydrant Installation 1. All wet-bottom detention facilities shall have an emergency vehicle accessible dry hydrant installed. See Figure 9.1, and Figure 9.2. Additional information regarding installation is available at the Office of the City Engineer. All dry hydrant installation sites will be approved by the Fire Chief and construction drawings will be approved by the Fire Chief and the City Engineer.