County of San Diego Sanitation District: Los Coches Sanitary Sewer Improvements from Maintenance Hole LSMH0555 to LSMH0599 Project

2 Documents in Project


SCH Number
Lead Agency
San Diego County
Document Title
County of San Diego Sanitation District: Los Coches Sanitary Sewer Improvements from Maintenance Hole LSMH0555 to LSMH0599 Project
Document Type
MND - Mitigated Negative Declaration

Document Description
The County of San Diego Sanitation District proposes the Los Coches Sanitary Sewer Improvement Project (proposed project) to improve and stabilize a section of an existing sanitary sewer pipeline. The proposed project will rehabilitate approximately 7,300 feet of an existing sewer collection system pipeline located between maintenance holes LSMH0555 to LSMH0599 below a section of Los Coches Creek. The proposed project follows the alignment of the existing sewer line, which is situated just south of Old Hwy 80 between its intersections with Gaucho Lane to the west and Flinn Crest Street to the east. The proposed work includes two main elements: installation of a composite lining within the existing pipe using the Cured-in-Place Pipe (CIPP) method. The CIPP liner serves to reinforce the existing pipe by precluding decay and providing additional structure for the pipeline. The second element includes reinforcement of three sections of pipeline through concrete encasement and a cover of Articulated Concrete Block to strengthen the cover and stability of streambed surfaces above the pipe section. These repairs and improvements would rehabilitate and stabilize the long-term safety and reliability of the sewer pipeline to reduce the likelihood of sewage spills and damage caused by pipe material degradation and erosion.

Contact Information
Cynthia Curtis
County of San Diego, Department of Public Works
Lead/Public Agency
5510 Overland Ave., STE 410
San Diego, CA 92123

Phone : (858) 694-3906

County of San Diego Sanitation District
Project Applicant


San Diego
Cross Streets
south of Old Hwy 80 b/w intersections with Gaucho Ln. to the west & Flinn Crest Str to the east

Notice of Completion

Review Period Start
Review Period End
Development Type
Other (Sectional rehabilitation of existing sewer pipeline)
Project Issues
Biological Resources
Reviewing Agencies
California Air Resources Board (ARB) California Department of Conservation (DOC) California Department of Parks and Recreation California Department of Transportation, District 11 (DOT) California Department of Water Resources (DWR) California Governor's Office of Emergency Services (OES) California Highway Patrol (CHP) California Native American Heritage Commission (NAHC) California Natural Resources Agency California Regional Water Quality Control Board, San Diego Region 9 (RWQCB) California San Diego River Conservancy (SDRC) California State Lands Commission (SLC) Department of Toxic Substances Control Office of Historic Preservation State Water Resources Control Board, Division of Water Quality State Water Resources Control Board, Divison of Financial Assistance California Department of Fish and Wildlife, South Coast Region 5 (CDFW)


Environmental Document
Los Coches_Biological Report   PDF 22347 K Los Coches_Cultural Report   PDF 2044 K Los Coches_Draft Initial Study_6   PDF 749 K Los Coches_Draft MND   PDF 246 K Los Coches_NOI   PDF 463 K Los Coches_OPR Summary Form   PDF 1129 K Los Coches_Project Map Figures   PDF 1060 K
Los Coches_NOC   PDF 1081 K
State Comments
2020060316_CDFW Comment   PDF 524 K

Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613. For more information, please visit OPR’s Accessibility Site.

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