Sacramento Environmental Commission January 2019

Our Levee System System Folsom Dam and Reservoir on American River 106 miles of levees and channels Sacramento Weir and Bypass Yolo Bypass Our Levee System SAFCA Jurisdiction

Why Do We Need All This Work? AMERICAN RIVER WATERSHED FOLSOM DAM RAISE (Authorized 2004) Construction to Begin 2019 AMERICAN RIVER WATERSHED COMMON FEATURES – NATOMAS BASIN (Authorized – 2014) Construction Ongoing AMERICAN RIVER WATERSHED FOLSOM DAM JOINT FEDERAL PROJECT (Authorized 1999) Construction Closeout AMERICAN RIVER WATERSHED COMMON FEATURES – AMERICAN RIVER (Authorized – 1996/1999) Construction Closeout AMERICAN RIVER WATERSHED COMMON FEATURES – WRDA 2016 (Authorized – 2016) Construction Ongoing SOUTH SACRAMENTO STREAMS (Authorized – 1999) Construction Closeout

Sacramento River Flood Control System Sacramento most at-risk city in America for riverine flooding Confluence of two major rivers (American and Sacramento Rivers) Over half million people in the floodplain About $70 billion in damageable property Deep flooding, cold water

Components of Flood Risk Reduction Program Combination of Storage and Conveyance Conveyance Restore original conveyance capability Increase conveyance capability Storage Increase storage capability

Conveyance Restore original conveyance capability Reconstruct levees to original capability Seepage Through and under to handle original design flow

Pocket Area Seepage 2017

Seepage Cutoff Wall

Conveyance (continued) Restore original conveyance capability Reconstruct levees to original capability Levee Slope Stability Adequate cross section Adequate slopes Many Levee Landslide Slopes too Steep 2017 Levee Slope Failure

February 13, 2017 Tyler Island Sacramento County Island had to be evacuated

Conveyance (continued) Restore original conveyance capability Harden river bank and levee slopes Erosion protection of river banks and levee slopes to handle original design flows June 2000 July 2007

1968 1986

Our Levee System Natomas Levee Improvements American River Levee Improvements South Sacramento Streams American River Watershed Common Features WRDA 2016

Conveyance (continued) Increase conveyance capability In addition to the work required to restore original conveyance capability Raise levees as needed Lower river stages Seepage Through and under to handle higher flows

Conveyance (continued) Increase conveyance capability Harden river bank and levee slopes Further Erosion protection of river banks and levee slopes to handle higher flows Widen Sacramento Weir and Bypass

Conveyance (continued) More efficient release capability

Our Levee System Natomas Levee Improvements American River Watershed Folsom Dam Modifications (Joint Federal Project) Our Levee System American River Levee Improvements South Sacramento Streams American River Watershed Common Features WRDA 2016

Storage Increase Storage Capability More efficient use of existing storage Additional storage

American River Watershed Folsom Dam Raise American River Watershed Folsom Dam Modifications (Joint Federal Project) Our Levee System American River Watershed Folsom Dam Raise

After Currently Authorized Projects Completed

Ongoing Federal/State/SAFCA Projects Phase   Current Estimate American River Watershed Common Features American River Project Close-out $320,000,000 Natomas Basin Design/Construction $1,200,000,000 General Re-evaluation Report $1,590,000,000 Folsom Dam Modifications Joint Federal Project $850,000,000 Folsom Dam Raise and Bridge $325,000,000 South Sacramento Streams Group $110,000,000 TOTAL $4,395,000,000

Recently Completed Projects South Sacramento Streams Group Project Congressionally authorized – 1999 To address flood risk South Sacramento streams Potential flooding from a levee breach in the Delta Final phases completed in 2016 Current Clean-up and close-out Approximately $110 million

Recently Completed Projects American River Watershed Common Features WRDA 96/99 (American River) Congressionally authorized – 1996/1999 Approximately 25 miles of levee improvements (including underseepage) on both banks of the American River Final sites completed in 2016 Current Clean-up and close-out Approximately $320 million

Recently Completed Projects American River Watershed Folsom Dam Modifications (Joint Federal Project) Authorized in 1999 Current Clean-up and close-out Constructed 20% by US Bureau of Reclamation and 80% by US Army Corps of Engineers Approximately $850 million for Corps of Engineers portion

American River Watershed Folsom Dam Raise Our Levee System American River Watershed Folsom Dam Raise

Folsom Dam Raise Originally authorized in 2004 Raise Folsom Dam by 3.5 feet Including Dikes 1- through 8 Including Mormon Island Auxiliary Dam Including he Left and Right Wing Dams Install Bulkhead Top Seals on Tainter Gates Additional retrofit of emergency and service gates

American River Watershed Common Features - Natomas Basin Our Levee System American River Watershed Common Features - Natomas Basin

American River Watershed Common Features - Natomas Basin 42 miles of levee around the perimeter of basin SAFCA completed portion of the levee work (teal) Congressionally authorized - 2014 Current Corps construction Reach I, Contract 1 Construction 2018-2019 Reach H Construction 2019-2020 Reach D Reach B Award 2019

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American River Watershed Common Features WRDA 2016 Our Levee System American River Watershed Common Features WRDA 2016

Congressionally authorized - 2019 American River: Sacramento River: Basic Components of the American River Watershed Common Features Project WRDA 2016 American River: 11 miles erosion protection Sacramento River: 9 miles of underseepage 10 miles of erosion protection Eastside Tributaries 4 miles of underseepage Congressionally authorized - 2019

Widen Sacramento Weir and Bypass Basic Components of the American River Watershed Common Features Project WRDA 2016 Widen Sacramento Weir and Bypass

$1.8 Billion In Federal Funding For SAFCA Projects July 5, 2018 - Administration announced the distribution of the funds provided under this supplemental appropriations bill American River Watershed Common Features WRDA 2016 project received $1,565,750,000 in construction funding American River Watershed Folsom Dam Raise Project received $216,523,185 in construction funding Both projects are fully funded for construction with goal to complete construction by 2024.

2018 – Record Year for Federal Funding - $1,910 2018 – Record Year for Federal Funding - $1,910.605,185 (FY 2018/ 2019/Supplemental Appropriations) 2018- FY 18-19 State Budget Bill including $170 million for State cost-share of Corps urban projects 2018 - $2,080,605,185 Federal and State Appropriations Available

Federal Appropriations – Status Chart PROJECT   FY 2015 TOTAL FY 2016 FY 2017 FY 2018 FY 2019 American River Watershed (Folsom Dam Modifications/JFP) – Construction 92,600,000 61,024,000 22,740,000 26,000,000 American River Watershed (Folsom Dam Raise) – Construction 1,200,000 18,641,000 222,298,185 American River Common Features, Natomas Basin – Investigation 1,500,000 3,500,000 American River Common Features, Natomas Basin – Construction 11,000,000 52,650,000 31,000,000 64,650,000 American River Common Features, WRDA 2016 – Investigation 2,823,000 907,000 American River Common Features, WRDA 2016 – Construction 1,565,750,000 95,300,000 94,165,000 78,213,000 1,845,955,185

Construction Status as of December 2017 Green Line Means Essentially Completed Yellow Line Means to be Constructed

Construction Status as of December 2018 Green Line Means Essentially Completed Yellow Line Means in Design Needs Construction Funding Dark Red Line Means Under Construction or In Contracting Process Blue Line Means Funded for Construction

Challenges to Advancing Flood-Risk Reduction Resources Consulting firms Construction firms Equipment and resources

April 14, 2015