Browse Items (7 total)

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

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

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

Map of proposed timber challenge course for Arbor Lake.

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,…

A 1993 map created by Iowa Department of Transportation.

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.