Bridge Coulee Fire

2017222,645 acresMontana

The Bridge Coulee Fire burned 222,645 acres, about 348 square miles, across 2 counties. It began on July 19, 2017.

Watch how it happened

Bridge Coulee Fire · 2017

How it happened

Watch it burn in the order satellites saw it, coloured by how severely each place burned.

About this replay
Date (UTC)—Historical replay
Burned so far—acres
High severity—of the area so far
Detections4,840satellite fire pixels

How severely it burned

Burn severity inside the final perimeter, classified from Landsat images taken before and after the fire.

Map of burn severity across the Bridge Coulee Fire
Burn severity by class
SeverityShareAcres
Highmost vegetation consumed, soils altered2.6%5,866
Moderatemixed: many trees killed, some survive25%56,085
Lowsurface fire, most trees survive67%148,150
Unburned to lowislands inside the perimeter, little change5.6%12,518

3% of the area inside the perimeter burned at high severity, about 5,866 acres; 28% burned at moderate or high severity.

Monitoring Trends in Burn Severity (U.S. Geological Survey and USDA Forest Service). Classes come from the change in a Landsat burn index (dNBR) between images before and after the fire; acres are each class’s share of the fire’s mapped area.

Where it burned

Acres inside each county, measured from the satellite-mapped perimeter.

Acres burned by county
Garfield CountyMT215,954
Petroleum CountyMT6,616

Other large fires in Montana in 2017

Monitoring Trends in Burn Severity (USGS and U.S. Forest Service). Type recorded: Wildfire.