San Diego Pipeline Nos. 4 and 5 Patrol Road Erosion Repair and Bank Stabilization Project

Summary

SCH Number
2011098469
Lead Agency
Metropolitan Water District of Southern California
Document Title
San Diego Pipeline Nos. 4 and 5 Patrol Road Erosion Repair and Bank Stabilization Project
Document Type
NOE - Notice of Exemption
Received

Document Description
The Metropolitan Water District of Southern CA proposes to repair erosion and stabilize the banks of drainage along the San Diego Pipeline Nos. 4 and 5 patrol roads between Stations 1527+00 and 1540+00. Metropolitan's patrol road is located adjacent and parallel to the drainage channel. Erosion in the drainage channel is undercutting and threatening the integrity of Metropolitan's patrol road and exposure of its pipelines. The purpose of the project is to stabilize the drainage embankment supporting the patrol road and protect the road from future erosion and pipelines from surface exposure. Metropolitan proposes to repair areas of erosion in the channel embankment by filling eroded areas with native materials, installing geotextile material, and placing ungrouted rip-rap on top of the geotextile material. Metropolitan also proposes to remove several invasive trees and other invasive vegetation that are impeding flow and contributing to erosion of the banks, install a new channel inlet structure upstream (east) of the patrol road, add grout to the rip-rap at the outlet structure downstream (west) of the patrol road, and create concrete drainage turnouts/downspouts along the edge of the patrol road to direct road runoff and allow for better drainage.

Contact Information
Jennifer Harriger
Metropolitan Water District of Southern California
P.O. Box 54153
Los Angeles, CA 90054-0153

213 217 7658

Location

Cities
Temecula
Counties
Riverside

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
C: 1, 3, 4; S: 15301, 03, 04
Reasons for Exemption
The proposed project consists of the operations, repair, maintenance, permitting, leasing, licensing, or minor alteration of existing public or private structures, facilities, mechanical equipment, or topographic features, involving negligible or no expansion of use beyond that existing at the time of the lead agency's determination. The proposed project consists of construction and location of limited numbers of new, small facilities or structures; installation of small new equipment and facilities in small structures; and the conversion of existing small structures from one use to another where only minor modifications are made in the exterior of the structure. The proposed project consists of public or private alterations in the condition of land, water, and/or vegetation, which do not involve removal of healthy, mature, scenic trees.
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