Bank Repair Along Stevens Creek

Bank Repair Along Stevens Creek

SAA 1600-2003-0090-3 The project proposes to repair a failed bank slope on the east side of Stevens Creek. The bank had previously been protected with sacked concrete and high flows have apparently undercut the toe of the bank causing the concrete to collapse into the creek. The proposed repair will conect to existing concrete both upstream and downstream of the repair site. Heavy equipment (backhoes, loaders, trucks, ect.) will access the creek via a ramp that will be graded into a slope. The access ramp will be constructed in the area of the failed slope to minimize additional impacts to the stream and assoicated riparian vegetation. A trench will be dug at the toe of the slope and rock placed into the trench approximately 4 feet deep to stabilize the toe of the bank. The rock will be placed up to the 2.33 year flood event. Above the rock the bank will be re-contoured and a cellular plastic soil confinement armor system placed up to the 100 year flood event. Planting pockets will be provided in the rock protection to allow for increased riparian re-vegetation. The soil confinement armor system provides slope protection while allowing riparian plantings in the geogrid openings. Clean river cobble will be placed in the channel to provide substrate for invertebrates. Erosion control methods will be employed during and after construction to reduce impacts to the creek. Upon completion of construction, under separate contract, a habitat restoration re-vegetation plan will be implemented to further reduce overall project impacts.

Santa Clara