Fish Passage Improvements at Cross Creek Ranch

Fish Passage Improvements at Cross Creek Ranch

The Applicant proposes to alter the streambed to modify an existing low flow crossing with a series of 5 rock weirs, extending downstairs for a linear distance of 250 feet. The weirs will be in approximately 40 to 50 foot intervals, U-shaped, a minimum of 3 feet across at the top, a maximum of 12 feet at the base, with no more than a 1-foot jump height and will be keyed into the back with 2 to 3 ton rock. Most of the rock keys will be vegetated. Bank restoration will include the removal of the pipe and wire revetment and the gabion baskets. The bank will be terraced and graded as much as the property owner allows. A toe trench will be dug about 4 feet deep, and 2 to 3 ton rock will be placed into the trench. Three boulder rootwad structures will be installed along the upper reach and anchored to the boulders with 5/8 inch galvanized cable and Hilti adhesive. Coir erosion control fabric will be used on the upper portion of the bank above the terrace. About 600 native plants will be planted and native seeds will be spread on the terrace, bank, and on the top of the bank. Willows will be planted in the trench with the anchor boulders and rootwads. A concrete curb on the apron will be constructed to help centralize low flows across the apron and deepen the water on the crossing. A new drainage swale that collects water from a Highway 1 culvert will direct runoff into the creek, there will be some grading to the existing road that crosses low flow crossing. This project is in cooperation with the Santa Ynez River Technical Advisory Committee, and supported by the Departments fishery grants program.

Lompoc

Santa Barbara