Willow Brook Ditch Maintenance (Lake or Streambed Alteration Agreement No. 1600-2020-0156- R1)


SCH Number
Public Agency
California Department of Fish and Wildlife, Northern and Eureka Region 1 (CDFW)
Document Title
Willow Brook Ditch Maintenance (Lake or Streambed Alteration Agreement No. 1600-2020-0156- R1)
Document Type
NOE - Notice of Exemption
Document Description
The project is limited to one encroachment. The project goal is to maintain approximately 3,500 feet of drainage channel between July 1 and September 1, 2020. Approximately 2,000 feet of the channel is perennial, while 1,500 feet is ephemeral. Channel flow capacity reduction is the result of increased aquatic vegetation density and decreased sediment routing. Reduce channel capacity has increased adjacent pasture flooding depth and rate. Maintenance activities includes removal of vegetative material and sediment deposits from the drainage ditch channel and channel reshaping. Where water is present on site, a coffer dam will be installed utilizing hay bales and plastic with water being pumped downstream of the site. Excavation and channel maintenance will not be allowed in flowing water. Due to the length of the project area, installation of more than one coffer dam will be required. Upon completion of work in any channel reach (not to exceed 1,000') such coffer dams shall be removed and any flow present reestablished. During this maintenance activity the excavated material will be placed on stable areas adjacent to the channel and shaped, or placed in stock piles and allowed to dry sufficiently to be handled. Stockpiles will be trucked to an appropriate disposal site off property. Any bare mineral soil developed during the excavation, outside the ditch channel, will be seeded to grass at the rate of 30lbs. per acre.

Contact Information

Nicholas Simpson
Agency Name
California Department of Fish & Wildlife
Contact Types
Lead/Public Agency


Northern California
Cross Streets
4 miles south of Eureka, County of Humboldt
Parcel #
State Highways
Willow Brook watershed

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Type – Class 2; California Code of Regulations, Title 14, Section 15302
Reasons for Exemption
The project includes maintenance of an existing channel and will have substantially the same purpose and capacity as when the channel was initially constructed. There would be no significant adverse impact on endangered, threatened, or rare species or their habitat pursuant to §15065. There are no hazardous materials at or around the project site that may be disturbed or removed. The project will not result in impacts that are significant when viewed in connection with the effects of past projects, the effects of other current projects, and the effects of probable future projects.
County Clerk


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