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
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SUTTER BUTTE FLOOD CONTROL AGENCYSupplemental Presentation on Variances andEncroachments
Feather River West Levee Project Project Area C
May 24, 2013
Greatly reducesflood 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 impactconstructability
Prioritizes expenditures on highest-risk issues first
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
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:…”
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.
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