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E3: Flood Risk Reduction Studies*

About This Project

This project develops engineering studies to understand the actual flood risk in high priority flood-prone areas and develops options for managing the flood risks.

Studies will focus on the following reaches:

  • Alamitos Creek upstream of Almaden Lake in San José

  • Rock Springs neighborhood along Coyote Creek in San José

  • Calera Creek near Milpitas High School to Interstate 680 in Milpitas

  • Tributaries to Lower Silver Creek (Ruby, Norwood, Quimby and Fowler creeks) in San José

The study includes hydrology, hydraulics, geotechnical and remapping work of the floodplain areas. If appropriate, updated maps will be submitted to Federal Emergency Management Agency (FEMA) to provide a more accurate reflection of the floodplain.

 

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

Needles Dr between Senter Rd and Welch Ave
Datapoints
Status
On Target
Location
Milpitas and San Jose
Schedule
Start FY 2014 / Finish FY 2028
Funding
Safe, Clean Water Fund ($9.4 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

Key Performance Indicators for the Safe, Clean Water Program

KPI #1: Complete engineering studies on 7 creek reaches to address 1% flood risk.

A 2-dimensional, unsteady hydraulic model for mid-Coyote Creek was completed in early 2016; it has been extended upsteam to include the Rock Springs neighborhood and is in the process of being calibrated to match high water marks from the February 2017 storm event, expected in early FY 2018.

KPI #2: Update floodplain maps on a minimum of 2 creek reaches in accordance with new FEMA standards. 

For Alamitos Creek, a geotechnical investigation for the levees/floodwall and a 2-dimensional model were both completed in the third quarter of 2016. Based on this information, preliminary floodplain maps were developed and presented to the City of San José in June 2017. The District will finalize the maps and will continue to work with the city to decide how the information should be used.

 

Updated April 2018 

For more information:

Environmental & Community Benefits

Key Performance Indicators for the Safe, Clean Water Program

  1. Complete engineering studies on 7 creek reaches to address 1% flood risk. 

  2. Update floodplain maps on a minimum of 2 creek reaches in accordance with new FEMA standards. 

Benefits

  • Provides more accurate mapping of areas at risk of flooding

  • May add or remove parcels from the FEMA regulatory floodplain, based on updated mapping standards

  • Information can be integrated into flood warning program to provide advance, real-time warnings of impending flood events 

  • Provides technical basis for developing future flood protection plans, and for potential funding partnerships

Geographic Area of Benefit

Milpitas and San Jose 

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.