Highway 1 Evacuation Corridor

Example of fuel reduction along roadsides

The objective of this project is to establish and maintain defensible space along the perimeter of National Park Service (NPS) land that is directly adjacent to Highway 1 and the residential hillside community in the high fire danger zones of Muir Beach. While the fuel type and load varies, much of this zone currently has large accumulations of tall, full brush, dense stands of unmaintained trees, and/or non-native species such as Scotch and French Broom and Heather. The heavy fuels, steep slopes, and north facing aspect of this area provide criteria to establish a shaded fuel break within 150 feet of all structures in accordance with local regulations. These are areas managed by the NPS and the project will be under their supervision. Treatment within non-native annual grassland communities will be limited to goat grazing and/or manual removal of dead woody vegetation, and removal of low lying shrubs and common coyote brush to achieve greater space among the vegetation, and reduce overall fuel. Treatment within oak woodland communities of the site will be limited to manual thinning using a hand crew. Fuel reduction work within oak woodland treatment zones will include pruning tree branches 8 to 10 feet above ground (not to exceed 1/3 of the tree’s total height), removal of dead/downed branches and dead standing trees, removal of small diameter (less than 4 inches DBH) live trees to achieve more space between trees, and understory ladder fuels removal, including Scotch broom and French broom, coyote brush shrubs, and shrub like understory tree saplings. Treatment will not include the removal of healthy, mature, scenic trees. In order to improve evacuation routes, invasive, flammable vegetation and accumulated dead biomass will be reduced along roads in Muir Beach. Work will focus on roadside vegetation up to 15 feet above the road surface and up to 10 feet from road edges. Clearing vegetation and lower level tree limbs from these areas will improve emergency responder access, reduce the amount of heat that evacuating residents might be exposed to during a fire, improve visibility, and expand usable width of roadways on Highway 1. No healthy, mature trees will be removed under this project. Trimmings and removed vegetation will be recycled through chipping or composting at regional facilities. Work will be performed at appropriate times of the year in order to reduce the potential for biological impacts.



Approval Meeting


CEQA Documentation



Southern Marin
Marin wild fire projects

Type Of Project

Evacuation Routes

Lead Agency

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