Lassen – Modoc Unit - Board of Forestry and Fire Protection - State ...

FIRE MANAGEMENT PLAN 2008
Lassen-Modoc Unit
Appendix F
Sample Risk Assessment 1
Hazard Assessment
The Hazard Assessment Process is presented in step functions that are
descriptive, not prescriptive in nature. The methods recommended
describe an overall approach that combines approaches taken by several
jurisdictions throughout the United States. In reviewing each step,
consider the extent each step contributes to a realistic assessment of the
fire hazard in your area.
Step 1: Select the area to be evaluated
Identify the interface boundary or boundaries on a map. Use a map
(preferably a topographic map) of the jurisdictional area and define the
known interface areas. After identifying the interface areas on the map,
give each area a name or number. Consider naming the areas after
related geographic names or land marks for easy reference.
Step 2: Select the hazard components to be considered
The hazard components discussed are divided into three categories—
structure hazards, vegetative fuel hazards, and other miscellaneous
hazards. The structure hazards include the structure’s location, building
materials and design. The vegetative fuel hazards include the vegetative
cover both within and beyond the vicinity of the structure. Miscellaneous
hazards included are the structure density (i.e., the number of structures
in an area), slope, and weather and fire occurrence.
Structure hazards: The building materials, design and location and the
fuels within the area will all contribute to the ability or inability of the
structure to survive a Wildland fire situation. By considering the following
structural hazards, new developments can be built with an increased
chance of surviving a Wildland/urban fire. Homeowners should be
educated on how to reduce the fire risk of existing structures.
Structure location: The structure should be built in a location that will
minimize vulnerable design features and maximize its survivability.
Structures should be set back at least 30 feet from property lines so that
the owners will have control of the adjacent areas. Structures should be
located away from dangerous topographic features such as the top of
slopes or adjacent to chimneys (draws and canyons).
Building Materials and Design: Should a building come in contact with
heat, flames or firebrands, the building materials and design should
prevent or retard the penetration of the fire beyond the exterior of the
structure.
1 Adapted from the NFPA Assessment Guide
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