Hydrological patterns and international boundaries define this region of the northern frontier. Located just above the northern border of the United States, the geography is dominated by a significant elongated water body that stretches across the western half of the sheet. The southern edge of the map is marked by the international border with Canada, which follows a straight geometric line that bisects the natural drainage patterns of the region. A network of smaller tributaries and creeks feed into the primary lake and larger river system to the south, illustrating the complex watershed of the Kootenay Boundary area at the turn of the decade.
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This is the sole edition of this map. No revisions or reprints were ever made.
1936 · Marcus
USGS Topo · 1:96,000
1942 · Marcus
USGS Topo · 1:125,000
1948 · Orient
USGS Topo · 1:62,500
1948 · Togo Mountain
USGS Topo · 1:62,500
1951 · Togo Mountain
USGS Topo · 1:62,500
1951 · Orient
USGS Topo · 1:62,500
1954 · Okanogan
USGS Topo · 1:250,000
1958 · Okanogan
USGS Topo · 1:250,000
1969 · Churchill Mtn
USGS Topo · 1:24,000
1969 · Laurier
USGS Topo · 1:24,000