Browse Items (7 total)

Map of proposed timber challenge course for Arbor Lake.

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.

Not to scale (1994 Flight) Poweshiek County crop year aerial map.

A series of engineering maps regarding the plan and profile of Basin 1 Relief Sewer, Grinnell, Iowa.

A 1993 map created by Iowa Department of Transportation.

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,…

Official document from State of Iowa Secretary of State recognizing the Poweshiek County Soil Conservation District as a governmental subdivision of the State.