Protecting Critical Levees: Water Supply at Risk

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Protecting Critical LeveesWater Supply at Risk
Association of Bay Area Governments October 24,
2008 Doug Linney, Vice President East Bay
Municipal Utility District
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Jones Tract Flooding - 2004
Levee Breach
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EBMUD Actions to Protect the Mokelumne Aqueducts

• 40 million invested in seismic retrofit of
  EBMUDs largest aqueduct in 2004
• 1.5 million spent each
• year for levee improvements
• and maintenance
• Emergency response plans
• crafted for restoring
• operations in event of
• major quake

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Major Delta Water Diversions
Mokelumne Aqueducts
CCWD intakes
Export Pumps
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Beneficiaries of Key Levees

• State and federal export pumps contractors
• Contra Costa Water District intakes
• State Highway 4
• Kinder Morgan pipeline
• PGE pipelines
• BNSF Railway line
• Transmission Agency of Northern California
• Agricultural lands
• Recreation corridors
• Ecosystem habitat within water channels

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EBMUDs Interests In the Delta

• Strengthening key Delta levees that surround
  aqueducts
• Protecting the Mokelumne fishery - potential for
  adverse impacts from new Delta conveyance options
• Planning for a long-term alternative to the
  aqueducts tunnel alternative promising

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Delta Islands Below Sea Level
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Near-Term Delta Actions

• Prioritize levees for improvements, based on
  state interest and asset value
• Implement pilot projects to improve export supply
  reliability, protect fish
• Conduct more detailed studies of long-term
  alternatives to protect against seismic, flooding
  risks

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Next Steps to Protect the Aqueducts

• Install scour protection on levees at key river
  crossings (Old, Middle, and San Joaquin Rivers)
• Interconnect the three aqueducts at either end of
  the Delta for redundancy in case of partial
  failure
• Seek additional state funding to upgrade 51 miles
  of levees

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Long-Term Delta FixTunneling the Mokelumne
Aqueducts

• 10 miles in length
• Two 87 pipes inside 19.5-foot tunnel
• 445M-950M cost range

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Questions?
2 ft.
1 ft.