The Canada/United States of America international boundary defines the southern edge of this 2017 survey, where a high-elevation landscape is documented by the U.S. Geological Survey. This specific section of the border area, marked by the survey point PB 41, represents a remote wilderness interface where the northern cascades meet the interior of British Columbia. The terrain is characterized by a dense network of high-altitude drainages and ridges, captured here with modern digital precision including data from the BLM and FWS. While the sheet is sparse in named human settlements, the intricate contouring and watershed patterns provide essential detail for understanding the hydrological and topographic character of this cross-border region.
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This is the sole edition of this map. No revisions or reprints were ever made.
1955 · Concrete
USGS Topo · 1:250,000
1958 · Concrete
USGS Topo · 1:250,000
1962 · Concrete
USGS Topo · 1:250,000
1969 · Remmel Mtn.
USGS Topo · 1:24,000
1969 · Ashnola Mtn
USGS Topo · 1:24,000
1969 · Ashnola Pass
USGS Topo · 1:24,000
2002 · Ashnola Mountain
USGS Topo · 1:24,000
2002 · Ashnola Pass
USGS Topo · 1:24,000
2002 · Remmel Mountain
USGS Topo · 1:24,000
2011 · Ashnola Mountain
USGS Topo · 1:24,000