Results of the 1982 Trumpeter Swan Survey in the Gulkana River Wildlife Habitat Area
In July 1982, BLM opened almost the entire Denali Block to mineral exploration. In this area. the greatest possibility for oil and gas production occurs in a low-potential petroleum basin south of the Alphabet Hills. This basin underlies the extensive wetlands used by nesting trumpeter swans. According to a 1975 USFWS swan survey, approximately 75% of the swans seen in the entire Gulk.ana Basin were in this area Citing, 1976). The Gulkana Basin, one of ten USFWS swan survey units in Alaska, supported the largest number of nesting trumpeter swans in the state in 1980.
Document Type / Category
Report
Document Collection
BLM Library
State/Office
National Office
Publication Date
1983
Science Subject