1. Feather River West Levee Project Project Area C May 24, 2013
SUTTER BUTTE FLOOD CONTROL AGENCY Supplemental Presentation on Variances and Encroachments
Feather River West Levee Project Project Area C
May 24, 2013

2. Permit
Greatly reduces flood risk by remediating through and under-seepage deficiencies
Requires removal of all encroachments which present a public safety risk
Requires removal of all encroachments which negatively impact constructability
Prioritizes expenditures on highest-risk issues first

3. Variances A lot of Variances? Yes, but...
Variances are for features that already exist in the ground today, not new facilities
Variances are proposed only for features which do not pose a safety of levee integrity issue – those that do are being removed
All variances proposed are related to construction (trench slopes w/ CLSM backfill, positive closure device location), materials, and time variances. – everything that we touch gets better!
Under proposed Title 23 Revisions, many of the Variances would not be Variances at all, but would be in full compliance

4. Encroachments

5. ULDC Requirements for Encroachments
ULDC “Recognizing that establishing permits for existing encroachments and/or removing unpermitted encroachments can be a lengthy process, often requiring administrative and/or legal actions by state or federal entities, the following is acceptable for meeting the urban level of flood protection:…”
Assess and prioritize risk associated with encroachments
Immediately remediate high hazard encroachments
Develop a plan to permit or remove low hazard encroachments over time
Under SBFCA’s FRWLP, approximately 90% of encroachments will comply with ULDC and Title 23 by the end of construction.
The remaining are being assessed and SBFCA will adopt a plan for remediation with target dates by December 31, 2013.

6. FRWLP Approach
Greatly reduce flood risk by remediating through and under-seepage deficiencies
Acquire property rights per ULDC
Move farming operations away from levee
Cure ALL non-compliant encroachments to meet Title 23 and ULDC requirements

7. FRWLP Approach (cont.) Encroachment Remedial Design Process:
Inventoried & inspected all encroachments
Assessed encroachments for levee safety
Assessed encroachments for levee constructability
Prepared remedial designs to meet Title 23 and ULDC
All findings and remedial designs were presented to the Independent Panel of Experts (IPE), DWR, USACE, and Board staff
All comments and recommendations were resolved and back-checked

8. Summary of 428 Actual FRWL Encroachments
102 – No-issue items: e.g., bike-paths, spur levees, Star Bend Levee, 115KV lines, bridges, items outside levee zone (e.g. orchards in floodway), etc.
3 – Relief Well Systems/Trench Drains (84 Shanghai Bend, 25 Star Bend, associated ditches)
10 - Roadways
85 - Dry Utilities (primarily overhead lines within levee zone) electrical & communication
51 – Pressurized up and over pipes (gas, water, sewer)
31 – Gravity pipes (water)
8 – Pressure pipes at grade
1 – Railroad crossing
28 – Unneeded/unused pressure and gravity pipes
17 - CVFPB violations for excavations in the levee
3 – Canals and ditches (Sutter Butte Main Canal (project C), private irrigation ditch (project A), private drainage ditch (project A2)
21 – Supply wells (within 30 feet of landward toe)
68 – Misc. structures (many are ‘after the fact’ permits issued by CVFPB)

9. Addressing 428 Actual FRWL Encroachments
102 – No-Issue Items: e.g., bike-paths, spur levees, Star Bend Levee, 115KV lines, bridges, items outside levee zone (e.g. orchards in floodway), etc.
No action required; complies with ULDC and Title 23
3 – Relief Well Systems/Trench Drains (84 Shanghai Bend; 25 Star Bend; associated ditches)
Repairing; replacing with slurry wall; no further action required
10 – Roadways
85 - Dry Utilities (primarily overhead lines within levee zone) electrical & communication
All will meet Title 23 and ULDC by end of constr.

10. Summary of 428 Actual FRWL Encroachments
51 – Pressurized up and over pipes (gas, water, sewer)
All will meet Title 23 and ULDC by end of Constr.
31 – Gravity pipes (water)
All will meet Title 23 and ULDC by end of Constr,
8 – Pressure pipes at grade; all to be upgraded
1 – Railroad crossing
Meets Title 23 and ULDC/installing closure structure
28 – Unneeded or unused pressure and gravity pipes – to be removed or abandoned

11. Summary of 428 Actual FRWL Encroachments
17 - CVFPB violations for excavations in the levee
We will fix all excavations by end of constr.
3 – Canals and ditches (Sutter Butte Main Canal (project C), private irrigation ditch (project A), private drainage ditch (project A2)
In addition to seepage remediation, SBFCA negotiating maintenance MOU for Canal; ditches to be moved.
21 – Supply wells (within 30 feet of landward toe)
18 wells to be abandoned; 3 small domestic wells TBD
68 – Misc. structures (many are ‘after the fact’ permits issued by CVFPB)
All reviewed for compliance with ULDC and Title 23; many to be removed during construction; remainder to be addressed by the plan

12. Conclusions
SBFCA has adopted a strategic, risk-based approach in collaboration with USACE, DWR, and CVFPB staff:
100% of encroachments adversely affecting levee integrity are addressed by construction;
approximately 90% of all encroachments will be ULDC and Title 23 compliant via FRWLP construction;
the remaining 10% will be assessed, and by December 31, 2013 SBFCA will adopt a compliance plan.