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A1: Main Avenue and Madrone Pipelines Restoration*

About This Project

This project will restore the Main Avenue and Madrone pipelines to full operating capacity of conveying 10 cubic feet per second (cfs) and 27 cfs, respectively, for a total of 37 cfs from Anderson Reservoir or the Santa Clara Conduit for groundwater recharge via the Main Avenue Recharge Ponds and the Madrone Channel. The project will plan, design, and construct approximately 14,000 linear feet or 2.6 miles of 30-inch to 36-inch diameter pipeline and associated appurtenances.



*This project was voter approved as part of the Safe, Clean Water and Natural Flood Protection Program.

Installing a section of pipeline beneath Cochrane Road in Morgan Hill.
On Target
Morgan Hill
Start FY 2015 / Finish FY 2019
Safe, Clean Water Fund, Water Utility Enterprise Fund ($16.1 million)
News and UpdatesNews and Updates
Reports and DocumentsReports and Documents
Environmental and Community BenefitsEnvironmental and Community Benefits
History and BackgroundHistory and Background
News & Updates

Construction updates

Construction will occur between January 2018 and July 2019. The project will be constructed in three (3) phases to minimize impacts to existing groundwater recharge operations and lessen impacts to the community. Details regarding construction related schedule and traffic impacts will be mailed periodically throughout the project.

Construction of phase 1, shown in purple on the map below, is expected to begin in late January. Phase 2, shown in yellow, is expected to begin in late June. Phase 3, shown in orange, is expected to begin in early November. As we complete each phase and prepare to enter the next, we will send a project reminder with details and other critical information.

Click here to view the pre-construction mailer.


What to expect during construction

Construction hours will be from 8 a.m. to 4:30 p.m. Monday through Friday. The district will construct this project within the Cochrane Road, East Main Avenue and Half Road public rights-of-way. The district will implement temporary vehicular and pedestrian traffic control to facilitate the safe construction of the project. The public will continue to have access to residential, commercial, agricultural and recreational properties and facilities throughout the project.

Expect traffic delays due to construction related activities. Please use caution when traveling through construction areas and take alternate routes when possible. During construction of phase 1, Peet Road should be used to bypass construction on Cochrane Road between Half Road and Cochrane Road. Elm Road should be used to bypass construction on Cochrane Road between Half Road and East Main Avenue.

For more information on traffic impacts, please visit the water district’s Traffic and Trail Impacts page by clicking here.

Project Status

  • The Project’s final design documents were completed in September 2017.

  • The Project’s construction contract advertisement occurred in September 2017 and was awarded to Monterey Peninsula Engineering in October 2017.

  • The Project's construction began in January 2018.

Updated April 2018 

For more information:

Reports & Documents


The District Board approved the Engineer's Report and adopted the California Environmental Quality Act (CEQA) Mitigated Negative Declaration (MND) in May 2017.

Environmental & Community Benefits

Key Performance Indicators for the Safe, Clean Water Program

  1. Restore transmission pipelines to full operating capacity of 37 cfs from Anderson Reservoir. 

  2. Restore ability to deliver 20 cfs to Madrone Channel.


  • Increases groundwater recharge by about 2,000 acre-feet per year in South County’s Llagas Groundwater Sub-basin, a sufficient water supply for 4,000 families of 5.

  • Improves operational flexibility.

  • Maximizes the delivery of imported water to treatment plants supplying drinking water to North County.

  • Saves energy, reduces operating costs, and cuts CO2 emissions by reducing dependence on Coyote Pumping Plant.

Geographic Area of Benefit 



History & Background

About the Safe, Clean Water and Natural Flood Protection Program

In November 2012 the voters of Santa Clara County overwhelmingly approved Measure B, the Safe, Clean Water and Natural Flood Protection Program, as a countywide special parcel tax for 15 years with a sunset date of June 30, 2028. This Program replaced the Clean, Safe Creeks and Natural Flood Protection Plan, which voters approved in November 2000.

The Safe, Clean Water Program was developed with input from more than 16,000 residents and stakeholders and was created to match the community’s needs and values. The voters of Santa Clara County identified five priorities:

Priority A: Ensure a Safe, Reliable Water Supply

Priority B: Reduce Toxins, Hazards and Contaminants in our Waterways

Priority C: Protect our Water Supply from Earthquakes and Natural Disasters

Priority D: Restore Wildlife Habitat and Provide Open Space

Priority E: Provide Flood Protection to Homes, Businesses, Schools and Highways

Other: Six projects from the Clean, Safe, Creeks Plan have been carried forward into the Safe, Clean Water Program.  

Each year, the District prepares a report providing a progress update for each of these Program priorities, along with fiscal year accomplishments.

To ensure transparency and accountability to the voters, the ballot measure also created an Independent Monitoring Committee, appointed by the Santa Clara Valley Water District Board of Directors. The Independent Monitoring Committee annually reviews the Program’s progress to ensure the outcomes are achieved in a cost-efficient manner and reports its findings to the Board.

In addition, the Program requires three independent audits, the first of which was conducted in FY 2017.

View the Safe, Clean Water Program’s annual reports, annual IMC audit reports, and independent audits, including a staff response, on the District website.