Sewer Pipeline Rehabilitation Phase R - 1
2 Documents in Project
Summary
SCH Number
2011118055
Public Agency
City of San Diego
Document Title
Sewer Pipeline Rehabilitation Phase R - 1
Document Type
NOE - Notice of Exemption
Received
Posted
11/4/2011
Document Description
The project proposes to rehabilitate approximately 7.23 miles of existing sewer pipelines located within the City's right-of-way and within three City-owned easements using trenchless technology, installation of 23 new cleanouts, replacement of one cleanout, rehabilitation of nine manholes, replacement of seven manholes, and 15 point repair locations. Two trenchless methods of sewer main rehabilitation may be used for this project. Both methods would require access from either two manholes or a manhole and cleanout for each pipe segment. The first method is cured-in-place pipe liner, which would require pulling the liner through the sewer main, curing it using hot water or steam, and cutting it at both manholes. The second method would use ribloc (spiral) liner, which would be pulled through the sewer main as plastic strips and then formed to the pipe to create a new pipeline linear within the existing pipe. Installation and replacement of new and existing manholes would require excavation of a 5'0" W x 5'0" L wide area and a 3'0" W x 3'0" L wide area for cleanouts extending from the ground surface to the depth of the existing sewer pipeline. Internal and/or external point repairs would be required to repair portions of pipe with offset joints, sags and/or intruding laterals. Internal point repairs would involve similar trenchless methods as rehabilitation, and would be contained solely within the existing pipe. External point repairs would require excavation of a maximum 10'0"L x 3'0" W wide area extending from the ground surface to the depth of the existing pipeline. Excavation of point repair areas would occur within the alignment of the existing pipeline. All trenching activities would occur within previously disturbed soils within urbanized areas.
Contact Information
Name
Myra Herrmann
Agency Name
City of San Diego Development Services Department
Contact Types
Lead/Public Agency
Phone
Location
Cities
San Diego
Counties
San Diego
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
15301, 15302, 15303
Reasons for Exemption
Existing facilities, Replacement or Reconstruction, New construction or conversion of small facilities.
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