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

Permit 18793-1 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

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

Encroachments

ULDC Requirements for Encroachments ULDC 7.12.1 - “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.

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

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

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 wells @ Shanghai Bend, 25 wells @ 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)

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 wells @ Shanghai Bend; 25 wells @ 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.

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

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

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.