Sespe Creek Levee Improvements / Certification / CLOMR/LOMR

Fillmore, CA


The portion of the existing levee system along an approximate 1.1-mile reach of Sespe Creek known as SC-2 within the City of Fillmore, California was identified as deficient in providing the required level of flood protection, resulting in the need to raise the top of the embankment along a 1,550 feet portion up to 6 feet. PACE contracted with the Ventura County Watershed Protection District to perform the engineering design to correct these hydraulic design deficiencies with a construction project that will upgrade the levee to meet current FEMA standards and remove the mapped flood hazards in the residential areas behind the levee to meet the required federal flood protection requirements. This engineering design required different technical analyses that provide the technical basis for the recommended levee rehabilitation design which includes (1) hydrology, (2) hydraulics, (3) geomorphology/sediment transport, (4) geotechnical, (5) economic flood damage, (6) levee local interior drainage, and (7) engineering alternatives feasibility analyses. The project required the first complex 408 permit to be completed within the USACE LA District. Final engineering and construction documents for the final design phase based on the recommended levee raising project takes the best aspects of each of the different alternatives involving a combination of fill and retaining walls.


Key Features:

  • Hydrology / hydraulics / sediment transport analyses
  • Levee design
  • Risk and uncertainty analysis
  • FEMA floodwall design
  • PS&E’s
  • Safety Assurance Review (SAR)
  • USACE 408 permit processing

Ventura County Watershed Protection District

Flood Control Systems, Stormwater Management / Flood Control