Hazard

Jurisdiction

How Identified

Why Identified

Avalanche and Landslide

·     Gallatin County

·     State DES Website

·     Historical records from the Avalanche.org database

·     Colorado Avalanche Information Center

·     Montana Hazard/Vulnerability Analysis, 1989

·     USGS National Landslide Study

·     Montana Department of Transportation District 2 Priorities

·     Public meeting input

·     2005 HAZUS Study

·     Mountainous terrain exists that may be prone to avalanches and landslides

·     The county has frequent avalanches involving the population

·     Priority landslide areas exist along roadways in the county

·     The county has areas of landslide incidences and susceptibility based on a USGS study

·     2005 HAZUS Study identified significant areas of landslide risk

Aviation Accident

·     Gallatin County

·     All Incorporated Cities and Towns

·     Research of NTSB database

·     Public meeting input

·     The county has three airports

·     Long history of incidents, some with casualties

·     Second busiest airport in the State located in Gallatin County

Communicable Disease and Bioterrorism

·     Gallatin County

·     All Incorporated Cities and Towns

·     Centers for Disease Control and Prevention website

·     Public meeting input

·     Local Health Department

·     Large number of livestock areas

·     History of an influenza outbreak during the 1910's

·     The area is highly traveled by tourists

·     Rapid disease spread potential through urban areas

Dam Failure

·     Gallatin

·     All Incorporated Cities and Towns

·     National Inventory of Dams website

·     Dam Emergency Action Plans

·     Several high hazard dams and several significant hazard dams exist in the county

Drought

·     Gallatin County

·     All Incorporated Cities and Towns

·     Montana Drought Advisory Committee website

·     National Drought Mitigation Center website

·     Data from the Western Regional Climate Center

·     State DES website

·     NOAA Paleoclimatology Program website

·     Public meeting input

·     Frequent historical drought events

·     USDA Disaster Declarations

·     Relationship to wildfire danger

·     Impact to agricultural community

·     Impact on natural resources and tourism

Earthquake

·     Gallatin County

·     All Incorporated Cities and Towns

·     Montana Bureau of Mines and Geology publication and website

·     USGS National Seismic Hazard Mapping Project website

·     University of Utah Seismograph Stations website

·     USGS National Earthquake Information Center website

·     2005 HAZUS Study

·     History of nearby earthquakes greater than 6.0 magnitude

·     Proximity to the active geological region of Yellowstone National Gallatin

·     2005 HAZUS scenarios defined a significant hazard

Flooding

·     Gallatin County

·     All Incorporated Cities and Towns

·     FEMA Flood Insurance Study and Rate Maps

·     Gallatin County DES documents

·     History of flooding

·     Large areas of identified floodplain in developed areas

Ground Transportation Accident

·     Gallatin County

·     All Incorporated Cities and Towns

·     Public meeting input

·     Subject matter expert input

·     Fire department records

·     Heavily traveled Interstate 90 and Highway 191 traverse the county

Hazardous Materials Release

·     Gallatin County

·     All Incorporated Cities and Towns

·     Gallatin County Hazardous Material Plan

·     State of Montana Hazardous Materials Plan

·     Public meeting input

·     Fire department records

·     Fixed facilities exist in the county that house hazardous materials

·     Regular interstate, highway, and railroad traffic transport hazardous materials

·     History of hazardous material releases

Railroad Accident

·     Gallatin County

·     All Incorporated Cities and Towns

·     Federal Railroad Administration database

·     Public meeting input

·     Active railroad exists in the county and passes through Bozeman , Belgrade , Manhattan and Three Forks

·     Several accidents have occurred in the past

·     Potential exists for a large hazardous materials release from a railroad accident

Severe Thunderstorms and Tornadoes

·     Gallatin County

·     All Incorporated Cities and Towns

·     National Climatic Data Center database

·     National Weather Service website

·     Subject matter experts

·     Severe thunderstorms, some causing damage, have occurred in recent history

Terrorism, Civil Unrest, and Violence

·     Gallatin County

·     All Incorporated Cities and Towns

·     Centers for Disease Control website

·     Gallatin County Emergency Operations Plan

·     Southern Poverty Law Center website

·     Anti-Defamation League website

·     Heightened alert since September 11, 2001

·     Small scale incidents have occurred in Gallatin County

·     Proximity to Yellowstone National Park and National Forest lands

Utility Outage

·     Gallatin County

·     All Incorporated Cities and Towns

·     Public meeting input

·     Subject matter experts

·     Dependence of population on utility services

Volcano

·     Gallatin County

·     All Incorporated Cities and Towns

·     Yellowstone Volcano Observatory

·     Montana Disaster and Emergency Services

·     Proximity to active volcanic caldera

·     History of ash fall over the county

Wildfire

·     Gallatin County

·     All Incorporated Cities and Towns

·     Gallatin County records

·     DNRC records

·     USFS records

·     Mountainous, forested, and flammable terrain exists throughout the county

·     History of significant wildfires, both forest and grass fires

·     Growth in the wildland/urban interface

Winter Storms and Extended Cold

·     Gallatin County

·     All Incorporated Cities and Towns

·     Western Regional Climate Center database

·     Public meeting input

·     History of road closures due to winter conditions

·     Potential for power outages during a cold spell