Post-Creek Fire Debris Flow Fencing


SCH Number
Public Agency
California Regional Water Quality Control Board, Central Valley Fresno Region 5 (RWQCB)
Document Title
Post-Creek Fire Debris Flow Fencing
Document Type
NOE - Notice of Exemption
Document Description
The purpose of this project is to reduce potential debris flow risk for critical facilities affected by the Creek Fire using an expended ring net debris system to catch debris flow events thus preventing damage to facilities at Mammoth Pool Pumphouse and Big Creek Dam 2. A flexible or expanding ring net GEOBRUGG barrier model would be installed at seven work area locations. Each GEOBRUGG barrier model includes a custom ring net with wire mesh, anchors, and hardware (e.g., shackles, brake rings, cables) engineered to resist the velocities and dynamic and static pressures unique to debris flows. Each work area consists of the proposed debris fence location, two anchor test locations, site access routes, and the associated disturbance area. Work areas include access routes that would be necessary to remove debris from the extent of potential debris flow retention up-gradient of fence installations.

Contact Information

Brandon Salazar
Agency Name
Central Valley Regional Water Quality Control Board
Job Title
Water Resource Control Engineer
Contact Types
Lead/Public Agency

Hazem Gabr
Agency Name
Southern California Edison
Job Title
Senior Water Quality Manger
Contact Types
Project Applicant / Parties Undertaking Project


Shaver Lake
Northern California, Southern California
San Joaquin River, Big Creek
Other Location Info
Debris Fences are on unnamed ephemeral streams adjacent to mammoth pool pumphouse and big creek dam 2.

Notice of Exemption

Exempt Status
Emergency Project
Type, Section or Code
Sec. 21080(b)(4); 15269(b)(c)
Reasons for Exemption
Due to the lack of significant revegetation in the canyons affected by the Creek Fire, topsoil and loose debris material does not have a substantial anchorage. Heavy rainfall events, specifically over the next five years, may trigger a large debris flow, which represents a threat to the Mammoth Pool and Big Creek basins and Utility Infrastructure.
County Clerk


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