Perez Water Diversion, Stream Crossings, and Remediation Project, Lake or Streambed Alteration Agreement No. EPIMS-MEN-08559-R1C

Perez Water Diversion, Stream Crossings, and Remediation Project, Lake or Streambed Alteration Agreement No. EPIMS-MEN-08559-R1C

The California Department of Fish and Wildlife has executed Lake and Streambed Alteration Agreement number EPIMS-MEN-08559-R1C, pursuant to Section 1602 of the Fish and Game Code to Jesse Perez. The project is limited to ten (10) encroachments. One encroachment is for removal of an unpermitted spring water diversion from unnamed tributaries to Middle Fork Feliz Creek. Water is diverted for irrigation. Work for this encroachment will include removal of the impoundment, water tanks, water pumps, batteries, and any debris from the diversion site. Exposed soil resulting from removal of the impoundment will be covered with surrounding duff material. One encroachment is abandoning of low water crossing on an intermittent watercourse. Work for this encroachment consists of restoring the natural streambed where evidence of a watercourse crossing facility was not observed. Work will primarily be confined to approaches to the watercourse crossing point. Approaches shall be prepared for seed casting and interim erosion control measures using a dozer to recontour the ATV trail to mimic surrounding natural topography. One encroachment is to abandon the existing pond outlet at the outside dam embankment of Pond 1 that has exposed a ten-foot segment of the overflow culvert. Work for this encroachment consists of installing a new 4-footwide v-ditch, with 6-inch layer of 6 inch- minus riprap with 6 inches embedded. The existing overflow culvert will stay in place and the eroded area will be filled with 6 inch-minus riprap extending 6 feet beyond the culvert outflow. One encroachment is to abandon the existing pond outlet at Pond 2 that is undersized and has caused mass wasting at the southwest hinge between native soil and fill material. Work for this encroachment consists of removing the existing undersized culvert and replace it with a 60-foot-long v-ditch spillway that terminates into a 15- foot-long pad with 8 inch- minus rock riprap that is 6 inches of embedded. At the inlet, the drainpipe is to be abandoned and capped. A 1/8-inch steel plate will be welded over the cap of the drainpipe. Repair of by backfilling and compacting to address erosion will be approved and under supervision of Geotechnical Engineer. Stated water use for Ponds 1 and 2 is aesthetic. If the stated water use changes for either of the ponds, the Permittee shall comply with State Water Code as appropriate for the proposed water diversion and water storage. The six (6) other proposed encroachments are to upgrade failing and undersized culverts. Work for these encroachments will include excavation, removal of the existing culverts, replacement with new properly sized culverts, backfilling and compaction of fill, and rock armoring as necessary to minimize erosion. Prior to installation of Crossing-8, recalculate sizing to confirm that it can handle Pond 1 overflow volumes that are proposed to be routed through the rock-lined v-ditch at Project 7 Crossing-10a.

Hopland

Mendocino

Northern California

Mendocino