Coatney Water Diversions, Pond Spillway, and Stream Crossings Project. Lake or Streambed Alteration Agreement No. 1600-2018-0178-R1

373 Documents in Project

Summary

SCH Number
2016112028
Lead Agency
Mendocino County
Document Title
Coatney Water Diversions, Pond Spillway, and Stream Crossings Project. Lake or Streambed Alteration Agreement No. 1600-2018-0178-R1
Document Type
NOD - Notice of Determination
Received
Posted
4/27/2023
Document Description
The California Department of Fish and Wildlife has executed Lake and Streambed Alteration Agreement number 1600-2018-0178-R1, pursuant to Section 1602 of the Fish and Game Code to Dennis Coatney. The project is limited to 11 encroachments. Two encroachments are for water diversion from unnamed tributaries to Cahto Creek. Water is diverted from POD-1 for domestic use and from POD-3 for irrigation. Work for the water diversions will include use and maintenance of the water diversion infrastructure. POD-3 will divert water from Holland Lake (formerly referred to as “Mast Dam”) on a nearby parcel (APN 014-250-50) and will serve as the sole irrigation water source. Five encroachments (SC-1, 3, 5-7) are proposed to upgrade failing and undersized stream crossings. Work for these encroachments will include excavation, removal of the failing culverts, replacement with new properly sized culverts, backfilling and compaction of fill, and rock armoring as necessary to minimize erosion. SC-5 shall be constructed to permit fish passage at all life stages. Fish passage designs for the restored stream shall be provided by May 31, 2024. Two encroachments (SC-4 & 8) are proposed to remove undersized stream crossing culverts and to conduct stream restoration and riparian revegetation. Work for these encroachments will include excavation, removal of the failing culverts, recontouring the stream bed and banks as close as possible to natural stream grade and alignment, and restoring the stream bank slopes to no greater than a 2:1 slope or natural slope. Streambanks will be stabilized and revegetated to prevent slumping and to minimize soil erosion. SC-4 shall be constructed to permit fish passage at all life stages. Fish passage designs for the restored stream shall be provided by May 31, 2024. One encroachment (SC-2) is proposed to replace an undersized stream crossing culvert with a rocked ford crossing. Work for this encroachment will include excavation, removal of the failing culvert, installation and secure placement of river washed rock for the ford, backfilling and compaction of fill on the approaches, and rock armoring as necessary to minimize erosion. The crossing shall be constructed to permit fish passage at all life stages. Fish passage designs for the new crossing shall be provided by May 31, 2024. The final encroachment is a spillway improvement project and water diversion (POD-4) for an existing on-stream pond. Stream water is impounded in the pond for watering livestock. Water is pumped from the pond to a storage tank in an animal pen for use by livestock at that location. The improved spillway shall be reconstructed and appropriately sized to pass the 100-year flow and permit fish passage at all life stages. Fish passage designs for the new spillway shall be provided by May 31, 2024. Project activities at stream crossings 2, 4, & 5 and at the stock pond (POD-4) spillway shall require pre-construction surveys by a Designated Biologist. Project activities at all other stream crossings shall require pre-construction surveys by a Designated Biologist if surface water is or becomes present during construction.

Contact Information

Name
John Herrera
Agency Name
CA Fish and Wildlife
Job Title
Environmental Scientist
Contact Types
Responsible Agency

Location

Cities
Laytonville
Counties
Mendocino
Regions
Northern California
Cross Streets
approximately 2.2 miles southwest of the town of Laytonville
Parcel #
014-250-83 & 014-250-50
Waterways
Cahto Creek watershed
Township
21N
Range
15W
Section
15
Base
MtDiablo

Notice of Determination

Approving Agency
CA Fish and Wildlife
Approving Agency Role
Responsible Agency
Approved On
County Clerk
Mendocino
Final Environmental Document Available at
County of Mendocino 860 N. Bush Street Ukiah, CA 95482 Contact: Julia Acker Phone: 707-234-6650

Determinations

(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
Yes
(4) A mitigation reporting or monitoring plan was adopted for this project
No
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
No

Attachments

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