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Qrr+fu�aca!mrr!F<hrrre*Ae++rmrcrr F.nluatran axf Well—d Ddo—uwr Ae;n l Wehcr Point Smahhmrk Sevn ft Prolecr (rtyof lrmkrmr CA would be required for this project Sycamore Environmental arranged a Pre-Application Interagency Meeting to discuss the project with responsible state and federal agencies This ' meeting was held at the Corps' office in Sacramento on 3 Apnl 1997, and was attended by representatives of the City of Stockton, Siegfried Engineering, and Sycamore Environmental Agencies in attendance included the Corps (Mr Dave Tedrick), U S Fish and Wildlife Service, ' and EPA 3. Mapping of Jurisdictional Features and Calculation of Impacts ' Siegfried Engineering provided Sycamore Environmental AutoCADT11 files to map the location of waters of the U S in the project study area ' 4. Literature Review Sycamore Environmental reviewed the following information sources ' a) National Wetlands Inventory Maps The U S Fish and Wildlife Service National Wetlands Inventory (NWI) map for Stockton West quadrangle was obtained to determine mapped wetlands in the project study area The Stockton Channel is mapped as R1 UBVx(Rivenne, tidal, unconsolidated bottom, permanent- tidal, excavated) in the vicinity of the project study area No other NWI mapped features occur within the project study area b) Soil Surrey Based on Natural Resource Conservation Service soil maps(NRCS, 1977, previously Soil Conservation Service, SCS), the project study area contains"urban land " No other soil classification is provided by NRCS for the project study area C Results 1 Wetland Determination and Delineation ' The Stockton Channel, a waters of the U S , is the only jurisdictional feature in the project study area There are no jurisdictional wetlands or special aquatic sites in the project study area The mean high tide, which approximates the ordinary high water mark(OHWM) at the ' seawall, is±3 5 ft The length of the existing and proposed seawall are essentially the same, 835 ft The new ' seawall will extend:1: 3 ft further into Stockton Channel than the existing seawall Asa result, the total area of jurisdictional waters of the U S permanently filled by the proposed project is 0 06 acre (835 ft x 3 ft) Two cofferdams will be placed in the channel during the construction of the stair sections A temporary impact of 0 02 acre(two 90 ft x 4 ft cofferdam structures) ' will also occur during construction The volume of material that may be placed at the base of the seawall below the waterline is approximately 20,000 ft (835 ft x 12 ft x 2 ft) 2. Wetland Functions and Values The Stockton Channel is a permanent waters of the U S Rivers and creeks provide water and food for wildlife, serve as migration and dispersal corridors for wildlife, and provide natural ' flood control There is no riparian vegetation along the Stockton Channel in the project study area SEA-B104 C)OG 9118197 Sycamore Environmental Consultants Inc 10 i