The Twin Falls County Multi-Jurisdiction All Hazard Mitigation Plan 2013 is a complete revision of the 2008 Twin Falls County All Hazard Mitigation Plan. The entire Hazard and Vulnerability Assessment was updated. The hazard ranking was changed a new format deployed that ranks the hazards according to five indices, 1) historical occurrence, 2) probability, 3) vulnerability, 4) spatial extent, i.e, the extent impact based on geography, and 5) the magnitude which looks specifically at the loss of life, injuries, and economic impact. The Plan format was changed to match the FEMA Local Plan Crosswalk Guidance. The figure below contains the revised risk ranking for Twin Falls County.
The full document is available here: Twin Falls Final Multi-Jurisdiction AHMP 2014