Upland Watercourse Restoration and Enhancement (Notification of Lake or Streambed Alteration, EPIMS Notification No. SON-22045-R3
Summary
SCH Number
2021100296
Public Agency
California Department of Fish and Wildlife, Bay Delta Region 3
(CDFW)
Document Title
Upland Watercourse Restoration and Enhancement (Notification of Lake or Streambed Alteration, EPIMS Notification No. SON-22045-R3
Document Type
NOE - Notice of Exemption
Received
Posted
10/18/2021
Document Description
The project is limited to strategic placement of on-site slash material into portions of ephemeral streams (unnamed tributaries) where head-cutting and channel incision are occurring in order to reduce erosion and sediment delivery downstream, eventually to Dutch Bill Creek. In areas where incision is occurring, fresh green bows will be placed parallel to the watercourse, limb-by-limb in the channel with the tips facing upstream in an interlocked fashion. Project sites will be accessed from existing forest roads. The process of strategic parallel placement typically begins at the active knickpoint of a headcut, followed by filling contiguous segments of entrenched channel downstream. The bows will be weaved together into a dense matrix to ensure thorough contact between biomass and the bed and banks of the channel to increase filtration surface area. The end result will be a densely packed but porous matrix that disperses the flow and energy of the water while trapping soil and leaf litter, disallowing further erosion and incision of the channel and mitigating headcut migration.
Contact Information
Name
James Hansen, Environmental Scientist
Agency Name
CDFW
Contact Types
Lead/Public Agency
Phone
Location
Counties
Sonoma
Regions
Northern California, San Francisco Bay Area
Other Location Info
The project is located at twelve unnamed tributaries to Dutch Bill Creek at
15290 Coleman Valley Road, in an unincorporated area of the County of Sonoma.
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
15304
Reasons for Exemption
Project consists of minor alterations to land, water, and vegetation which do not involve removal of healthy, mature, scenic trees.
County Clerk
Sonoma
Attachments
Notice of Exemption
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