Lake or Streambed Alteration Agreement No. EPIMS-HUM-47531-R1C - Emmerson Bar Gravel Extraction Project

59 Documents in Project

Summary

SCH Number
1992083049
Lead Agency
Humboldt County
Document Title
Lake or Streambed Alteration Agreement No. EPIMS-HUM-47531-R1C - Emmerson Bar Gravel Extraction Project
Document Type
NOD - Notice of Determination
Received
Posted
6/12/2024
Document Description
The project is limited to one encroachment for aggregate extraction from the Emmerson Bar (Mine ID 9112033), Mad River for commercial purposes. The gravel extraction volume approved under a Vested Rights Determination by the County of Humboldt is 50,000 cubic yards of gravel annually from the Emmerson Bar. However, due to subsequent excessive extraction concerns, federal permit restrictions on the annual volume of gravel extracted were implemented based on a flow-based analysis of gravel replenishment. The Permittee proposes continuing extraction according to the flow-based analysis currently in use. Over the last five years (2019 through 2023), annual extraction volumes averaged approximately 9,000 cubic-yards, except in 2020 when no extraction was conducted. Aggregate extraction consists of removal of flood-washed alluvial material using heavy equipment (e.g., front-end loaders, excavators, bulldozers, and dump trucks) from outside the Mad River wetted channel Aggregate extraction methods and volumes shall be consistent with approved annual extraction work plans. Extraction occurs during the summer low-flow period when alluvial deposits are exposed. Fisheries- and riparian-enhancement or off-channel extractions may be included annually and involve connection of extraction areas to the wetted channel. Temporary crossings of the wetted channel may be needed to access gravel deposits. Timing of the installation and removal of these crossings is conducted to avoid periods of peak flows, salmonid migration and spawning, other aquatic organisms, and requires coordination with CDFW scientific staff. Crossings are also designed to minimize the extent of channel disturbance and avoid sensitive aquatic habitat.

Contact Information

Name
Jonathan Hollis
Agency Name
CDFW
Job Title
Environmental Scientist
Contact Types
Responsible Agency

Location

Cities
Blue Lake
Counties
Humboldt
Regions
Northern California
Parcel #
025-161-006, 312-151-015, 312-151-019
Waterways
Mad River, a tributary to the Pacific Ocean
Township
6N
Range
2E
Section
29,30
Base
Humboldt

Notice of Determination

Approving Agency
CDFW
Approving Agency Role
Responsible Agency
Approved On
County Clerk
Humboldt
Final Environmental Document Available at
County of Humboldt Planning and Building Department 3015 H Street Eureka, CA 95501 Contact: Joshua Dorris Phone: (707) 268-3779

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
Yes
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
No
(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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