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Stream Maintenance Program

About This Project

As part of its Stream Maintenance Program (SMP), the Santa Clara Valley Water District (Valley Water) plans to perform work along creeks across Santa Clara County this summer. Under the SMP, work occurs annually to improve the environment, reduce the risk of flooding and keep our communities safe. For decades, our crews have been trekking into streams to remove sediment build-up, manage vegetation, clear trash and debris, and stabilize banks that have eroded during high water flows. The SMP ensures streams with completed flood protection projects continue to function as designed to protect homes and businesses. Valley Water owns and manages about 275 miles of streams. Each year, portions of these streams are inspected and prioritized for maintenance projects. 

  • Under the "News and Updates" tab below, you'll find information on this year's projects.
  • Under the "Reports and Document" tab below, you'll find various notices, factsheets and documents related to SMP. 
  • Under the "Environmental and Community Benefits" and "History and Backgrounds" tabs below, you'll find more background about the program. 

For more information about the program or projects, you can also contact Albert Le at 408-630-2860 or [email protected]. 

Example stream maintenance work
Mid-June to Mid-October
Work Days
Mon-Fri (Some Sat. work may be necessary)
Work Hours
Between 7 a.m. and 5 p.m. (work before 8 a.m. limited to prep activities)
Safe, Clean Water and Natural Flood Protection Program (Partial)
News and UpdatesNews and Updates
Reports and DocumentsReports and Documents
Environmental and Community BenefitsEnvironmental and Community Benefits
History and BackgroundHistory and Background
News & Updates

2020 Projects* 

2020 Stream Maintenance Program Projects Countywide Notice 

The projects listed here are part of this season’s proposed work and are the most significant anticipated work. Existing work and minor work are not included in this listing. Pending state and federal regulatory approvals, work on Stream Maintenance Program projects will continue through Oct. 15. In some instances, Valley Water may request and receive work extensions beyond Oct. 15 to complete projects. Other work including minor maintenance, riparian planting, invasive plant removal, and other vegetation management projects can occur year-round. A copy of this year's general program notice and separate project notices for specific projects can be found under the "Reports and Documents" tab. 

What to expect 

Work on SMP projects typically occurs Monday through Friday, but Saturday work may be necessary to complete some projects. Work hours are set by local city ordinances, starting between 7 a.m. and generally ending by 5 p.m. Our crews strive to be courteous to all neighbors. Any work occurring before 8 a.m. will be limited to preparation activities with minimal noise impact.

Potential Types of Stream Maintenance Program Work

Bank protection

  • High and/or sustained water flows can cause extensive damage to creek banks, eroding existing flood protection improvements and natural elements. Repairing creek banks also helps protect neighboring homes and property from damage.

Sediment removal

  • Sediment and debris washed downstream can restrict the flow of water in some areas. During a heavy storm, these areas of restricted flow could cause water to back up, increasing the risk of flooding. Crews remove sediment to allow stormwater to flow through the creeks as designed.

Vegetation management

  • Each year, Valley Water crews manage over 3,000 acres of instream and upland vegetation. Selective removal of instream vegetation maintains flow conveyance in streams and riparian corridors. Managing upland vegetation restores maintenance access and maintains fire code compliance.
  • Invasive plant management:
    • Invasive plant species, such as Algerian ivy, cape ivy, Himalayan blackberry, tree of heaven and giant reed, are also removed because they present a major threat to the ecosystem. These plants thrive and spread aggressively and can negatively alter wildlife patterns, soil stability and water quality. Invasive plants can increase the risk of flooding and fire danger, undermine structural assets and obstruct access to roads, levees and trails.
  • Goat grazing:
    • Valley Water uses goats to remove vegetation on creeks and parcels. These goats eliminate dry grasses, weeds and woody growth – all potential fire hazards. As a component of Valley Water's Integrated Pest Management (IPM) practices, using goats to perform weed abatement is an alternative to herbicide application and mowing.

Riparian planting

  • Riparian planting enhances and establishes habitat for birds, amphibians, fish and other terrestrial and aquatic species living in creek corridors. Our riparian planting program compensates for the riparian impacts created by sediment removal, bank stabilization, and vegetation management activities.
  • Valley Water crews begin by removing invasive and non-native annuals and grasses that compete with native plants. Then, vegetation program specialists select and plant vegetation that meets the habitat needs of the project site and has the highest likelihood of surviving and thriving. Valley Water staff will continue to monitor and maintain the project site for 5 to 7 years after the initial planting to ensure the project is successful.

Instream habitat improvement

  • To address the impacts of removing sediment and large woody debris from certain streams, Valley Water also performs instream habitat improvement work. This can include adding gravels and logs or root wads to the creek to create more habitat complexity for fish and other species.

*The information on this page has been provided by Valley Water staff for SMP work anticipated to be conducted this year. While Valley Water will make every effort to undertake these projects, work may not be conducted for multiple reasons, including delays in receipt of regulatory agencies’ approvals, wildlife considerations, unforeseen site conditions, unavailability of resources, and compliance with social distancing and other public health guidance, among other circumstances.

Map is graphic representation for reference only and not intended as a technical exhibit. Work locations are not exact and to scale.


Location Project Site** Project Type(s) Current Status
1 Cupertino Regnart Creek downstream of Blaney Avenue Sediment removal Completed
2 Cupertino Regnart Creek downstream of Kim Avenue Sediment removal, Bank protection Completed
3 Gilroy Llagas Creek upstream of Leavesley Road Sediment removal In Progress
4 Gilroy Lions Creek downstream of Santa Teresa Boulevard Bank protection Completed
5 Gilroy West Branch Llagas Creek Bank protection Completed
6 Gilroy Llagas Creek downstream of Bloomfield Avenue Bank protection Completed
7 Los Altos, Mountain View Permanente Creek at Eastwood Drive Sediment removal Planned
8 Los Gatos, Campbell, and San Jose Los Gatos Creek: Vasona Park to Campbell Avenue Vegetation management, Invasive plant removal Shifted to year-round maintenance
9 Milpitas Calera Creek upstream of Escuela Parkway Sediment removal Completed
10 Milpitas Los Coches Creek downstream of Park Victoria Drive Sediment removal, Bank protection Completed
11 Milpitas Lower Penitencia Creek downstream of Great Mall Parkway Bank protection In Progress
12 Mountain View Stevens Creek upstream of Crittenden Lane Sediment removal, Bank protection In Progress
13 Mountain View Stevens Creek upstream of Middlefield Road Sediment removal, Bank protection Postponed
14 San Jose San Tomas Aquino Creek at Westmont Debris Basin Sediment removal Completed
15 San Jose Calabazas Creek downstream of Highway 237 Vegetation management Planned
16 San Jose San Tomas Creek downstream of Highway 237 Vegetation management Planned
17 San Jose Coyote Creek: N McCarthy Blvd to Highway 237 Vegetation management In Progress
18 San Jose Guadalupe River: Hwy 880 to Montague Expressway Vegetation management, Invasive plant removal In Progress
19 San Jose Sierra Creek upstream of Tulare Drive Riparian planting Shifted to year-round maintenance
20 San Jose Guadalupe River: W. St. John Street to Grant Street Vegetation management Completed
21 San Jose Thompson Creek near Quimby Road Sediment removal, bank protection Completed
22 San Jose Thompson Creek near Pettigrew Bridge Sediment removal, Bank protection Postponed
23 San Jose Ross Creek upstream of Ross Avenue Sediment removal Completed
24 San Jose Guadalupe Creek downstream of Almaden Expressway Riparian planting Shifted to year-round maintenance
25 San Jose Alamitos Creek upstream of Greystone Creek Confluence Bank protection Completed
26 San Jose Golf Creek near Camden Avenue Bank protection Completed
27 San Jose Alamitos Creek upstream of Graystone Lane Vegetation management, Bank protection Planned
28 San Jose Randol Creek upstream of Rajkovich Way Riparian planting Shifted to year-round maintenance
29 San Jose Canoas Creek upstream of Snell Avenue Bank protection Completed
30 San Jose Lower Silver Creek upstream of Tully Road Sediment removal In Progress
31 San Jose and Santa Clara Guadalupe River: Montague Expressway to Tasman Drive Vegetation management, Invasive plant removal In Progress
32 Santa Clara Saratoga Creek from the San Tomas Aquino Creek confluence to Warburton Avenue Sediment removal In Progress
33 Santa Clara Saratoga Creek upstream of Pruneridge Avenue Bank protection Postponed
34 Sunnyvale Sunnyvale East Channel downstream of Fremont Avenue Bank protection Postponed

**For Santa Clara County creeks that flow toward Monterey Bay (i.e., creeks in the Pajaro Watershed, including Uvas Creek and Llagas Creeks, and their tributaries), in general, the terms, “upstream of” and “downstream of” can be further understood as “north of” and “south of”, respectively. For Santa Clara County creeks that flow toward San Francisco Bay (i.e., creeks not in the Pajaro Watershed), in general, the terms, “upstream of” and “downstream of” can be further understood as “south of” and “north of”, respectively. Learn more about watersheds here.


Environmental & Community Benefits

Valley Water's Stream Maintenance Program (SMP) ensures flood protection projects continue to function as designed to protect homes and businesses along water district streams.

Thanks to various flood protection projects completed by Valley Water, some homes and businesses have been removed from FEMA-designated flood zones, and in addition to flood risk reduction activities, save residents countywide over $2 million in flood insurance premiums each year. Once those flood protection projects are completed, Valley Water’s Stream Maintenance Program ensures those projects continue to function as designed to protect homes and businesses along water streams.

  • There are more than 800 miles of creeks in Santa Clara County. Valley Water owns 278 miles of streams in the county, but only a portion of these have been modified with flood protection projects. Those are the streams that are maintained by Valley Water.

Valley Water crews regularly inspect stream and bank conditions. Toward the end of the rain season, staff finalize the proposed work plan for the upcoming Stream Maintenance Program work season.

From June to October, after securing state and federal regulatory agencies’ approval of the work plan, our crews trek into streams to remove sediment, manage vegetation, clear trash and debris, and stabilize banks that have been eroded. While the heavy work takes place in the summer, stream maintenance is a year-round effort.

During heavy storms, unruly vegetation and sediment washed down from areas upstream can restrict the flow of water and in some areas, cause a back-up, increasing the risk of flooding. Valley Water monitors known “hot spots” for vegetation and debris buildups and where needed and safe to do so, take action to remove these blockages and reduce the threat of localized flooding.

Stream maintenance work also includes an integrated vegetation management program which provides many benefits. Removal of in-stream vegetation ensures flow conveyance. Upland vegetation management is performed to meet fire code compliance and maintenance access. Native planting and invasive plant removal projects improve the ecological habitat of the riparian ecosystem.

If you observe a problem in any creek in our service area, you can report it on our "Access Valley Water" online customer request and information system. This is the best way to alert our field crews of downed branches, eroding banks, trash, graffiti or overgrown vegetation.


Before erosion repair
After erosion repair


History & Background


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. The 15-year plan’s five priorities are to:

  1. Ensure a safe, reliable water supply for the future.
  2. Reduce toxins, hazards and contaminants, such as mercury and pharmaceuticals, in our waterways.
  3. Protect our water supply and local dams from the impacts of earthquakes and natural disasters.
  4. Restore fish, bird and wildlife habitat and provide open space access.
  5. Provide flood protection to homes, businesses, schools, streets and highways.

Priority D provides funding for Valley Water to conduct mitigation site maintenance on native plant revegetation projects in creeks where we have jurisdiction to complete work. Priority E provides funding for Valley Water to conduct vegetation management and sediment removal projects for flow conveyance in creeks where we have jurisdiction or approval to complete work. The funding for this work is critical as it helps to enhance and establish habitat for wildlife and reduce flood risks to our communities. Thank you for your investment.

Detailed information on the Safe, Clean Water Program, including project and program descriptions, finances, implementation plans, and provisions for external oversight can be found at:

Before and after sediment removal on Berryessa Creek