
Agassiz National Wildlife Refuge dominates this Marshall County landscape, revealing an intricate system of managed wetlands and pools within the Whiteford, East Valley, and Grand Plain townships. The map documents a highly engineered environment where the Mud River and Lost River are diverted and pooled through features like Agassiz Pool and the tiered Upper, Middle, and Lower CCC Pools. This 1962 survey, updated with 1982 aerial data, shows the concentration of management infrastructure near the Refuge Headquarters, including a Lookout Tower and Green Stump Pool. South of the federal lands, the Elm Lake State Wildlife Management Area extends the conservation footprint, while the presence of Judicial Ditch No 11 underscores the region's history of complex water management for both drainage and habitat preservation.
30 named features on this map. Tap any name to fly to it.
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2 editions found
1918 · Rollis
USGS Topo · 1:62,500
1918 · Middle River
USGS Topo · 1:62,500
1943 · Rollis
USGS Topo · 1:62,500
1943 · Thief River Falls
USGS Topo · 1:62,500
1952 · Thief River Falls
USGS Topo · 1:250,000
1954 · Roseau
USGS Topo · 1:250,000
1956 · Thief River Falls
USGS Topo · 1:250,000
1957 · Roseau
USGS Topo · 1:250,000
1957 · Thief River Falls
USGS Topo · 1:250,000
1958 · Roseau
USGS Topo · 1:250,000