1. Sacramento
Environmental
Commission
January 2019

2. 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

3. 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

4. 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

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

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

11. Pocket Area Seepage 2017

12. Seepage Cutoff Wall

13. 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

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

15. 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

17. 1968
1986

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

19. 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

20. 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

21. Conveyance (continued)
More efficient release capability

22. 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

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

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

25. After Currently Authorized Projects Completed

26. 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

27. 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

28. 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

29. 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

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

31. 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

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

33. 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
Current Corps construction
Reach I, Contract 1
Construction
Reach H
Construction
Reach D
Reach B
Award 2019

34. 34

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

36. 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

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

38. $1.8 Billion In Federal Funding For SAFCA Projects
July 5, 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.

39. 2018 – Record Year for Federal Funding - $1,910
2018 – Record Year for Federal Funding - $1, ,185 (FY 2018/ 2019/Supplemental Appropriations)
2018- FY State Budget Bill including $170 million for State cost-share of Corps urban projects
$2,080,605,185 Federal and State Appropriations Available

40. 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

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

42. 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

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

44. April 14, 2015