Highway 49 Siphon Repair Project

Project Description

Placer County is restoring a segment of pipe along the Highway 49 sewer trunk pipeline in order to address the deterioration that was identified by Environmental Utilities staff during routine camera inspections. This trunk pipeline conveys approximately two-thirds of the Sewer Maintenance District 1 (SMD 1) sewer flow and a structural failure of this section of pipe would cause interrupted sewer service, potential environmental impacts, and significant traffic impacts on Highway 49.

Work will include excavation of two pits in Highway 49 and the installation of a cured in place pipe inside of the existing deteriorated pipe.

Notice of Exemption

A Notice Of Exemption was prepared for this project.

Project Location

The sewer trunk pipeline runs under Highway 49 from Marguerite Mine Road to Joeger Road. The deteriorated section that will be restored is a 320-foot span near the intersection of New Airport Road.

Project Schedule

• October 19, 2014 through October 29, 2014
• The schedule is subject to change

What to Expect 

• Intersections and driveways will remain accessible
• Large trucks and trenching equipment in roadways (traffic control will be implemented; delays should be expected)
• No interruption of sewer service
• Northbound traffic reduced to one lane, and pedestrian detours in the project vicinity, for 10 consecutive nights between 8 p.m. and 5 a.m, Sunday through Thursday and between 11 p.m. and 6 a.m., Friday and Saturday

Point of Contact

• Robin Mahoney, PE
  Associate Civil Engineer
• Phone: 530-886-4929

Project Funding

The contract for construction is $336,400. The total estimated Project cost is $500,000 including:

• 20% construction contingency
• CalTrans coordination
• Construction management
• Contract development
• Environmental documentation
• Labor cost for utility staff
• Project management

Funding for the project is from SMD 1 User Fees, with no net County Cost.