R-1269 DFM-1307-01 MP 6.69 Protect Pipe (Notification of Lake or Streambed Alteration, No. 1600- 2019-0209-R3)
Summary
SCH Number
2023080585
Public Agency
California Department of Fish and Wildlife, Bay Delta Region 3
(CDFW)
Document Title
R-1269 DFM-1307-01 MP 6.69 Protect Pipe (Notification of Lake or Streambed Alteration, No. 1600- 2019-0209-R3)
Document Type
NOE - Notice of Exemption
Received
Posted
8/23/2023
Document Description
The project is limited to protecting a pipeline segment that is subject to exposure from erosive forces within the stream. Activities will include excavating an approximately 15-foot-long, 12-foot-wide, 2-feet-deep trench within the streambed to expose the pipeline, with an appropriate slope to facilitate installation of the pipeline protection
materials. The excavation will remove approximately 12 cubic yards of sediment. All excavation will be performed with hand tools only and limited to the streambed where the pipeline is located; no excavation will occur within the streambanks. The exposed pipeline surface will be cleaned of soil and debris with a small shovel or trowel so the
pipeline protection materials can be applied. All materials will be hand carried into the stream corridor. First, a base layer of black diamond carbon filter will be installed around the pipeline. Next, a 1-inch thick rock guard will be installed, followed by 2-inch nominal thickness high-density polyethylene timber fastened to the pipeline with
stainless steel straps every 24-inches along the pipeline. The pipeline protection materials are designed and will be installed in such a way as to be resistant to wash out during high velocity stream flows. Upon completion, excavated materials will be replaced and compacted to restore the preexisting stream contours. The surface layer of cobble substrate will be removed and set aside during excavation, and then replaced following construction in the impacted area using hand tools. The project area including the access area immediately north of the stream will be mowed for fire suppression.
Contact Information
Name
Melanie Day
Agency Name
CDFW
Job Title
Senior Environmental Scientist, Supervisory
Contact Types
Lead/Public Agency
Phone
Location
Cities
Windsor
Counties
Sonoma
Regions
Northern California, San Francisco Bay Area
Other Location Info
The project is located at Sotoyome Creek immediately southeast of the Old Redwood Highway and Ward Road intersection, partially within the Town of Windsor, County of Sonoma, State of California. It is centered at approximately Latitude 38.567002, Longitude -122.832182.
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
15301
Reasons for Exemption
The project consists of the operation, repair, maintenance, permitting, leasing,
licensing, or minor alteration of existing public or private structures, facilities, mechanical equipment, or topographical features, involving negligible or no expansion of existing or former use.
County Clerk
Sonoma