Nevada County accepts evacuation study, moves to new green‑waste and fuel‑reduction steps

The Nevada County Board of Supervisors on April 23 accepted a county evacuation study that models wildfire scenarios, traffic clearance times and infrastructure limitations for the unincorporated area and recommends targeted road and fuel‑reduction projects for Alta Sierra, Lake Wildwood, Lake of the Pines, Cascade/Banner Mountain and Greenhorn.

Craig Griesbach, director of the county Office of Emergency Services, told the board the study was completed this year with CAL FIRE and county funds and contractors Ladrus and Pyroanalysis, and that planners used community input, field surveys and fire‑behavior modeling to identify evacuation vulnerabilities. "The evacuation study being presented to you today has been completed in partnership with local departments, first responders, state agencies, industry experts, and our engaged community," Griesbach said.

Lieutenant Mike Bingham of the Sheriff's Office summarized area findings: "The study determined Alta Sierra was most at risk for a catastrophic wildfire event due to residential density, topography and fuel load." The presentation noted evacuation of Alta Sierra or Lake Wildwood could affect about 7,000 residents; other study areas had estimated affected populations ranging from roughly 1,300 (Greenhorn) to 5,900 (Lake of the Pines).

Recommendations combine county, state and neighborhood actions: collaborate with Caltrans and the Nevada County Transportation Commission on targeted roadway improvements (turnouts, shoulder widening, and additional travel lanes where feasible), create shaded fuel breaks of roughly 100 feet for key evacuation corridors, improve private‑road conditions and remote‑control access at gated egress points, and increase home‑hardening and defensible‑space measures.

Board members pressed staff on implementation and funding. Supervisor comments stressed the scale of work needed and the role of private property owners and Firewise communities in maintaining improvements. Griesbach said much cannot be done by the county alone and outlined ongoing programs that will use the study to pursue grants and local projects, including FEMA‑funded roadside vegetation planning and a CAL FIRE‑funded Woodpecker Ravine treatment.

The board voted unanimously to accept the study. Supervisors also asked staff to research mechanisms to secure emergency egress easements, to develop shared‑road maintenance or letters‑of‑agreement templates for private roads, and to prioritize projects and funding pathways so the county can pursue near‑term implementation.

Alongside the study vote, staff announced expanded green‑waste initiatives intended to help residents remove hazardous vegetation and fuels. Craig Griesbach said the county contracted Waste Management for additional free green‑waste drop‑off days at the McCourtney Road transfer station (April 15 completed; April 29 planned) and will continue the Firewise Community Green Waste Grant program that places 130‑yard dumpsters directly in neighborhoods. Staff committed to reporting usage and tonnage after the events to guide future opportunities.

Next steps include using the study to support grant applications, continue Firewise micro‑grants and green‑waste work, and schedule community outreach and Firewise‑community workshops to help residents understand evacuation routes and their responsibilities.

The board accepted the study and the associated staff recommendations; no ordinance or new county code was enacted in this action.