This project was comprised of two phases .
Client:
US Army Corps of Engineers
Location:
San Joaquin, Sacramento, Feather River, CA
The first phase of work included inspection of over 100 miles of levees in the San Joaquin, Sacramento, and Feather River drainages, and documentation of all damage incurred during the 1997 floods. Types of damage included levee breaches, sand boils, seepage, levee crest settlement, slope failure, and wave wash erosion. The second phase of work involved preparation of plans and specifications to address specific measures to be implemented at each damage location.
AGS’ scope of work included mapping of all levee damage. For each damaged section of levee, appropriate repair measures were recommended, such as slurry cutoff walls and total reconstruction of levees, and repair costs are estimated. Economic analyses were performed, which include estimates of net worth of all crops and structures in each potentially flooded basin, and a benefit-cost ratio analysis is made, to assess the feasibility of implementing the recommended levee repairs. A Project Information Report was submitted to the Corps of Engineers, and included geotechnical recommendations on levee repairs, a detailed economic analysis, an assessment of environmental and archaeological issues, and real estate concerns. For the second phase of work, AGS catalogued levee damage into specific types and prepares plans and specifications for repairs at each type of damage. Included in the plans and specifications were borrow material requirements, excavation lines, and final design slope.
