Klawitter Stream Crossings Project (Streambed Alteration Agreement No. EPIMS-HUM-18572- R1C)

634 Documents in Project

Summary

SCH Number
2015102005
Lead Agency
Humboldt County
Document Title
Klawitter Stream Crossings Project (Streambed Alteration Agreement No. EPIMS-HUM-18572- R1C)
Document Type
NOD - Notice of Determination
Received
Posted
12/30/2021
Document Description
This Agreement relies on the Notification materials and a desk review without a CDFW site inspection. The project is limited to three encroachment(s) (Table 1) to upgrade failing and undersized stream crossings. Work for these encroachments will include excavation, removal of the existing crossings, replacement with new properly sized crossings, backfilling and compaction of fill, and rock armoring as necessary to minimize erosion. Crossing-1 40.9636, -123.7486 Replace existing crossing with a minimum 36-inch diameter by 60-foot-long culvert set at stream grade and aligned with channel. Inlet shall extend 2 feet beyond fill slope and outlet shall extend 3 feet beyond fill slope. Armor inlet and outlet with average 14-inch diameter rock to prevent erosion. Construct critical dip to road-left. Re-cap driving surface with road-base rock for 50 feet to road-right and past critical dip to road-left. Store spoils at least 100 feet from crossing where they are not likely to enter a watercourse and cover with erosion control. Crossing-2 40.9665, -123.7473 Replace existing culvert with a minimum 42-inch diameter by 51-foot-long culvert at -15% grade and aligned with channel. Inlet shall extend 2 feet beyond fill slope and outlet shall extend 3 feet beyond fill slope. Armor inlet and outlet with average 18-inch diameter rock to prevent erosion. Place 7.5 yards of average 18-inch diameter riprap along fill slope from outlet to natural channel. Construct critical dip to road-left. Construct rolling dip 65 feet to road-right. Re-cap driving surface with road-base rock for 70 feet to road right and past critical dip to road-left. Clean out inboard ditch. Crossing-3 40.9698, -123.7474 Replace existing culvert with a minimum 30-inch diameter by 55-foot-long culvert at grade and aligned with channel. There is not enough space for inlet to extend 2 feet, set inlet at current inlet. Outlet shall extend 3 feet beyond fill slope. Armor inlet and outlet with average 12-inch diameter rock to prevent erosion. Construct critical dip to road-left. Construct rolling dip 60 feet to road-right. Re-cap driving surface with road base rock for 60 feet to road-right and past critical dip to road-left. The Notification also discloses the use of a well located at Lat/Long 40.9653, -123.7543. This well is presented as the sole source of water for all water needs on the property. CDFW did not evaluate hydraulic connection of the well to surface water, nor was a hydrogeologic evaluation prepared by a licensed geologist provided for CDFW review. Based on the available resources, the well may be hydraulically connected to streams and/or springs and shall be evaluated for potential impacts from commercial cannabis irrigation use through Humboldt County’s cannabis cultivation permit (PLN-13160-CUP).

Contact Information

Name
Cheri Sanville
Agency Name
California Department of Fish & Wildlife
Job Title
Senior Environmental Scientist Supervisor
Contact Types
Responsible Agency

Location

Cities
Blue Lake
Counties
Humboldt
Regions
Northern California
Cross Streets
approximately 5 miles southeast of the town of Blue Lake
Parcel #
522-032-011
State Highways
299
Waterways
Mad River watershed
Township
07N
Range
04E
Section
29
Base
Humboldt

Notice of Determination

Approving Agency
California Department Of Fish & Wildlife
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
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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