The California Department of Fish and Wildlife (CDFW) has executed Lake and Streambed Alteration Agreement number 1600-2019-0157-R5, pursuant to section 1602 of the Fish and Game Code to the project Applicant, Ventura County Watershed Protection District.
The purpose of the project is to decommission the Santa Rosa Road No. 2 Debris Basin, extend the existing box culvert beneath Santa Rosa Road, and repair and extend an existing storm drain. Work in the flow channel shall be conducted in the dry season to avoid surface water, and the decommissioning period shall be approximately three and a half months in duration.
The debris basin decommissioning project activities include the removal of the earthen dam, emergency spillway, intake and outlet piping and related facilities. Additionally, the project will restore approximately 150 linear feet of the tributary where the dam is removed. Approximately 7,700 cubic yards of earth material shall be excavated and re-used on site to create a 14-foot-wide low-flow channel and banks varying from a 2:1 to 2.5:1 slope. All earth material shall remain on site with no export. Planting of the recontoured stream slopes shall be conducted at the end of decommissioning activities to prevent erosion. Plantings shall consist of hydroseeding and/or planting container stock of native plants. A temporary irrigation system shall be installed for watering the erosion control plantings until their root systems are established.