Grizzly Valley Dam Spillway Backfill Permeability Investigation
Summary
SCH Number
2023070479
Public Agency
California Department of Water Resources
(DWR)
Document Title
Grizzly Valley Dam Spillway Backfill Permeability Investigation
Document Type
NOE - Notice of Exemption
Received
Posted
7/24/2023
Document Description
Up to six permeability tests around the spillway. Each permeability test will involve digging a 6 to 8-inch diameter hole (using hand tools or a powered post hole digger). Water will be poured down the hole and the rate of water drop recorded. A short length of PVC pipe will be installed in the hole and will be used to monitor the change in water level. Once completed the holes will be backfilled with excavated cuttings. Holes will not be left open overnight. Access will be on foot from dam crest road.
Contact Information
Name
Kevin Moncrief
Agency Name
DWR
Job Title
Environmental Scientist
Contact Types
Lead/Public Agency / Project Applicant / Parties Undertaking Project / Responsible Agency
Phone
Location
Cities
Portola
Counties
Plumas
Regions
Northern California
Township
23N
Range
13E
Other Location Info
Project site is located on both sides of the Grizzly Valley Dam Spillway at Lake Davis near Portola, CA. It is in the NE ¼ T23N, R13E and at approximately 5800’ elevation.
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
15301
Reasons for Exemption
This project is exempt for maintenance of an existing facility. Biological and Archaeological evaluations have been completed and no sensitive resources will be impacted.
County Clerk
Plumas
Attachments
Notice of Exemption
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