Iowa Heritage Digital Collections
State Library of Iowa

Browse Items (30 total)

Water table depth test
Water Project Needs Help
V. Chatfield Gully, 1958
U.S. Army Corps Wetland Criterial, 1987
New Techniques Help Reduce Nitrates In Water
Man and drain
John Teeter demonstrating an engineer's level, 1957
John Teeter demonstrating an engineer's level, 1957
J.W. Robertson Wall, 1959
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