This historical map portrays the area of Boulder Lake Reservoir NE in 2010, primarily covering Ault Township as well as portions of Marion Lake. Featuring a scale of 1:24,000, this map provides a highly detailed snapshot of the terrain, roads, buildings, counties, and historical landmarks in the Boulder Lake Reservoir NE region at the time. Published in 2010, it is the sole known edition of this map.
This is the sole edition of this map. No revisions or reprints were ever made.
1953 · Boulder Lake Reservoir
USGS Topo · 1:24,000
1954 · Barrs Lake
USGS Topo · 1:24,000
1954 · Thompson Lake
USGS Topo · 1:24,000
1954 · Two Harbors
USGS Topo · 1:250,000
1954 · Hibbing
USGS Topo · 1:250,000
1956 · Pequaywan Lake
USGS Topo · 1:24,000
1957 · Two Harbors
USGS Topo · 1:250,000
1957 · Hibbing
USGS Topo · 1:250,000
1957 · Brimson
USGS Topo · 1:62,500
1957 · Markham
USGS Topo · 1:62,500