
Boulder Creek flows across the southeastern corner of this remote Alaskan quadrangle, cutting through the high elevation terrain of the Yukon-Koyukuk Census Area. The landscape is defined by its topographic relief, with prominent ridges and valleys falling within the surveyed townships of t32n r19e, t32n r20e, t31n r19e, and t31n r20e. This 2018 survey illustrates the physical geography of the region in the early twenty-first century, showing the natural drainage patterns that feed into the larger Coleen River watershed. The lack of roads or structures highlights the untouched nature of this northern interior wilderness, where map-based research is essential for understanding the hydrological and geological layout of the land.
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This is the sole edition of this map. No revisions or reprints were ever made.
1951 · Coleen
USGS Topo · 1:250,000
1956 · Coleen
USGS Topo · 1:250,000
1983 · Coleen C-6
USGS Topo · 1:63,360
1990 · Coleen B-5
USGS Topo · 1:63,360
1990 · Coleen B-6
USGS Topo · 1:63,360
1990 · Coleen C-5
USGS Topo · 1:63,360
2018 · Coleen C-5 SE
USGS Topo · 1:25,000
2018 · Coleen C-6 NE
USGS Topo · 1:25,000
2018 · Coleen C-6 SE
USGS Topo · 1:25,000
2018 · Coleen C-5 NE
USGS Topo · 1:25,000