This project is complete.

The existing 20" pipeline supplies raw water from the Coast Pump Station to the Graham Hill Water Treatment Plant where it is treated and supplied to City of Santa Cruz customers. It has had a number of leaks recently where it crosses under the San Lorenzo River. This project will replace this problematic segment and restore full reliability to this critical pipeline by constructuing a new 24" pipeline and abandoning the existing one.

Project Objectives

• Replace an existing critical pipeline to transfer raw water to be treated and supplied to City of Santa Cruz customers.
• Restore reliability of primary water supply infrastructure.

Project Components

• Approximately 520 feet of 24-inch pipeline, about 220 feet of which is installed through trenchless microtunneling methods under the San Lorenzo River.
• Open-cut trenching to install the remaining 300 feet of pipe on both the west and east banks of the river.
• A jacking pit with approximate dimensions of 45'Lx20'Wx72'D and a receiving pit with approximate dimensions of 30'Lx20'Wx51'D.
• Pit dewatering.

Plan and profile views here 

Project Schedule

Construction Impacts: Minimal disruptions to the San Lorenzo River and surrounding riparian area.

Project Documents

You can find the Initial Study and Proposed Mitigated Negative Declaration for the project on the Environmental Documents page.

Project Contact

Mitch Kyotani,  mitchell.kyotani@hdrinc.com  Mobile: 925.588.9767