Ayers Water Diversion, Stream Crossings, and Embankment Removal Project (Lake or Streambed Alteration Agreement No. 1600-2018-0731-R1)

607 Documents in Project

Summary

SCH Number
2015102005
Lead Agency
Humboldt County
Document Title
Ayers Water Diversion, Stream Crossings, and Embankment Removal Project (Lake or Streambed Alteration Agreement No. 1600-2018-0731-R1)
Document Type
NOD - Notice of Determination
Received
Posted
4/19/2021
Document Description
The project is limited to six encroachments. One encroachment is for water diversion from an unnamed tributary to South Fork Bear Creek. Water shall be diverted for domestic use only. Work for the water diversion will include use and maintenance of the water diversion infrastructure. The second encroachment shall remove a disused spring-box and all associated diversion infrastructure from the stream channel. Work for this encroachment will include excavation and proper storage or disposal of the infrastructure off-site. The third encroachment shall replace an undersized culvert and remove excessive rock armoring. Work for this encroachment will include excavation, removal of the undersized culvert and excessive rock armoring, replacement with a new properly sized culvert, backfilling and compaction of fill, and rock armoring only as necessary to minimize erosion at the inlet, outlet, and slope faces. The third and fourth encroachments shall upgrade informal dirt ford crossings with appropriately designed armored fill crossings. Work for these encroachments will include excavation, removal of the fill material down to the natural streambed, realignment and recontouring of the natural channel, replacement with new properly sized rock, backfilling and compaction of fill, and rock armoring as necessary to minimize erosion. The sixth encroachment shall remove a dirt embankment and paved spillway impounding the stream. Work for this encroachment will include dismantlement and removal of the paved spillway, excavation and removal of the fill material comprising the embankment down to the natural streambed and banks, proper storage and/or disposal of the material off-site, and revegetation of the riparian area.

Contact Information

Name
Jonathan Hollis
Agency Name
California Department of Fish & Wildlife
Contact Types
Responsible Agency

Location

Cities
Whitethorn
Counties
Humboldt
Regions
Northern California
Cross Streets
2872 Chemise Mountain Road in the town of Whitethorn, County of Humboldt
Parcel #
108-281-003
State Highways
101
Waterways
Mattole River watershed
Township
5S
Range
2E
Section
19
Base
Humboldt

Notice of Determination

Approving Agency
Cheri Sanville
Approving Agency Role
Responsible Agency
Approved On
County Clerk
Humboldt
Final Environmental Document Available at
Humboldt County Dept. of Planning and Building 3015 H Street Eureka, CA 95501 Contact: Steven Lazar Phone: 707-445-7245

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
Yes
(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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