The Yukon Flats basin in east-central Alaska is a 8,500 mi2 basin containing up to 10,000 ft of Cenozoic fill including upper Miocene to upper Oligocene nonmarine coal-bearing lacustrine strata (Kirschner, 1994). CBM potential in the basin was primarily based on a 1994 2 USGS climate studies core hole that was drilled to a depth of 1,282 ft near the village of Fort Yukon at lat 66.55949 N, long 145.20616 W. After setting steel casing through the top 100 ft of Quaternary gravel deposits, the well was drilled through mid-Pliocene to early-Miocene lacustrine, fluvial, and paludal deposits (Ager,...