Region
Yukon
4
Alaska Highway corridor
2
Mackenzie River Delta
2
Prudhoe Bay to Valdez route
2
Beaufort Sea Coast
1
British Columbia
1
Cook Inlet region
1
Fairbanks North Star Borough
1
Mackenzie River Valley
1
Nikiski
1
Northwest Territories
1
Point Conception, California
1
Point Thomson
1
Prudhoe Bay
1
Tanana River watershed
1