Metropolitan Water District of Southern California
Culvert Installation at Service Connection SD-2
NOE - Notice of Exemption
The Metropolitan proposes to install two culverts at Service Connection SD-2, located along the access road for the San Diego Pipeline Nos. 4 and 5. Metropolitan proposes to install two 18-inch diameter culvert pipes at an existing paved road crossing at Rainbow Creek to convey creek flows beyond the road crossing to the natural drainage downstream. The pipes would be held in place by six-inch minus rock concrete slurry and a constructed headwall and tail-wall at the upstream and downstream edges of the crossing, respectively. Within the road crossing, the pipes would be covered with suitable road base material consisting of gravel and sand. In order to install the culverts, Metropolitan proposes to remove accumulated sediments and vegetation from the project area.
The project consists of the operation, repair, maintenance, or minor alteration of existing public structures, facilities, mechanical equipment, or topographical features, involving negligible expansion of use beyond that existing at the time of the lead agency's determination. The project also consists of the construction and location of limited numbers of new, small facilities or structures.