Pacific Highway Trunk Sewer Project
Project Overview
Install 496 linear feet of new 30-inch pipe and manholes on Grape Street from North Harbor Drive to Pacific Highway. This will replace a 24-inch portion of the existing trunk sewer located at an adjacent parking lot, and relocate it into the street, making it more accessible for maintenance purposes.
Rehabilitate 4,630 linear feet (0.88 miles) of 36-inch and 39-inch pipe in Pacific Highway and associated manholes from Grape Street to Sassafras Street by slip-lining the pipes with 30-inch High Density Polyethylene (HDPE) pipe. This is a trenchless method of pipe rehabilitation.
Replace 80-feet of 8-inch PVC pipe in Pacific Highway through Grape Street.
Add 76 feet of 12-inch PVC pipe in Grape Street
Rehabilitate existing manholes, install curb ramps, and slurry seal streets affected by construction.
Construction activities include excavation of a deep trench on Grape Street and deep pits in and near the edges of other streets, all of which fall below the groundwater table. In order to perform the work, a pump powered by a generator will remove all standing sea water from the trenches and pits. This ensures the continuous and timely progress of the project. The infiltrating sea water will be discharged into a downstream sewer manhole via small pipes placed along the street curbs.
Additionally, due to the depth of these trenches and pits and the requirement for the safety of the construction crews, structural reinforcement along the trenches will be installed. In order to do this, a large pile driver will be used to hammer large sheet piles deeply into each of them immediately following all excavation operations.
Noise Advisory - Pump generators will emit a continuous engine-running sound throughout construction activities. The pile driver will emit a banging sound when hammering the large sheet piles into the trenches and pits. This activity is performed after the trenches and pits are excavated and can take 1-2 weeks to complete, depending on soil and groundwater conditions.
Noise from the contractor's operations will not exceed limits established by applicable laws and regulations in the working areas.
Schedule
Construction Start: August 2011
Construction Finish: June 2012
Monday through Friday nights between 9:00 p.m. and 6:00 a.m. - Only for work on Grape Street; within the intersections of Pacific Highway and Laurel Street; and Pacific Highway and Hawthorn Street.
Monday through Friday between 8:30 a.m. and 3:30 p.m. - For all other work on Pacific Highway.
Important Documents
Project Background
Pacific Highway Trunk Sewer is part of the Sewer Main Replacement Program established by the City of San Diego and mandated by the Environmental Protection Agency (EPA). This project is located in the Centre City, Midway-Pacific Highway and Reserve Community areas.
The existing trunk sewer is 36-inch and 39-inch Reinforced Plastic Mortar (Techite) pipe installed in the 1970s which has deteriorated and is in need of replacement.
Benefits
- Increase in sewer system reliability
- Reduction of future maintenance costs
- Improved accessibility for maintenance personnel
- Upgrade of deteriorated sewer main to current City standards
- Relocation of a major portion of the trunk sewer to the public right of way
Cost
The total project cost including design, construction and inspection is estimated at $4,622,000.
Contact Us
If you would like to receive more information about this project, please email us at
engineering@sandiego.gov
