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Arbor Lake Map
Map of proposed timber challenge course for Arbor Lake.
Skunk River Basin Maps, 1987
Skunk River Basin Maps including information on alluvial and buried channel aquifiers; depth to bedrock; quaternary isopach; median nitrate concentration for sample centers and shallow bedrock areas.
1994 Poweshiek County Crop Year Map
Not to scale (1994 Flight) Poweshiek County crop year aerial map.
1985 Basin 1 Relief Maps
A series of engineering maps regarding the plan and profile of Basin 1 Relief Sewer, Grinnell, Iowa.
Poweshiek County Highway and Transportation Map
A 1993 map created by Iowa Department of Transportation.
National Wetlands Inventory
Series of aerial photograph maps dated 1983-05 of wetlands in Poweshiek County. Technical responsibility notations dated 1990. Towns included: Newburg, Grinnell(North & South), Searsboro, Sheridan, Malcolm, Montezuma, Belle Plaine SW, Brooklyn,…
1945 Proclamation
Official document from State of Iowa Secretary of State recognizing the Poweshiek County Soil Conservation District as a governmental subdivision of the State.