Hoang Water Diversion, Onstream Reservoir Removal and Stream Crossings Project (Streambed Alteration Agreement No. EPIMS-HUM-13648-R1C)

Hoang Water Diversion, Onstream Reservoir Removal and Stream Crossings Project (Streambed Alteration Agreement No. EPIMS-HUM-13648-R1C)

This Agreement relies on the Notification materials and a desk review without a CDFW site inspection. The project is limited to six encroachment(s) (Table 1). One encroachment is for water diversion from an unnamed tributary to Supply Creek. Water is diverted for domestic use only. Work for the water diversion will include use and maintenance of the water diversion infrastructure. One encroachment is to authorize work that the Permittee has elected to pursue to remove an unpermitted onstream reservoir. Work for the reservoir removal will involve dewatering, use of a coffer dam, removal of a culvert and decommissioning of a stream crossing. The Permittee will proceed as notified in coordination with CDFW for project timing. Four encroachments are to upgrade stream crossings. Work for these encroachments will include excavation, removal of the failing crossings, replacement with new properly sized crossings, backfilling and compaction of fill, and rock armoring as necessary to minimize erosion. POD-1 40.9746, -123.7383 Water diversion from for domestic use. Domestic Use Water diversion for domestic use year-round. Permittee shall implement Seasonal Diversion Minimization: 200 gallons per day from May 15 – October 31, 80% bypass at all times. Onstream Reservoir Removal 40.9762, -123.7282 Permittee has elected to remove an unpermitted onstream reservoir. This work shall proceed as notified in coordination with CDFW for project timing. Crossing-1 40.9754, -123.7283 Replace existing culvert with minimum 24-inch diameter culvert. Crossing-2 40.9757, -123.7290 Replace existing culvert with minimum 24-inch diameter culvert. Crossing-3 40.9747, -123.7385 Replace existing culvert with minimum 42-inch diameter culvert. Crossing-4 40.9745, -123.7396 Replace existing culvert with minimum 42-inch diameter culvert. The Notification also discloses the use of a well located at Lat/Long 40.9746, -123.7237. This well is presented as the sole source of water for all cannabis cultivation on the properties. 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 the County’s conditional use permit/cannabis cultivation permit (PLN-11978 & PLN-11980). No other projects that may be subject to FGC section 1602 were disclosed. This Agreement does not retroactively permit any constructed reservoirs (including “ponds”), stream crossings, water diversions, modifications to riparian buffers, or other encroachments not described in Table 1.

Willow Creek

Humboldt

Northern California

Humboldt