This is just the beginning! Our collection holds over 300 years of history, including rare newspapers, obituaries, marriage records, birth records, and so much more—most of which you won’t find anywhere else!
Sinkholes threaten groundwater supply in NE Iowa
In extreme northeast Iowa nearly 13 000 sinkholes in Allamakee Clayton and Winneshiek counties pose a major threat to groundwater. Geologists say chemicals like atrazine reach aquifers via sinkholes, with 400 holes between Elkader and Postville and 20 to 50 percent of local groundwater contamination entering through them.
MENTIONED IN THIS ARTICLE
Owa City
Iowa
Bernard Hoyer
Iowa Department of Natural Resources
Hoyer
Bob Libra
DNR
Allamakee
Clayton
Winneshiek Counties
Wisconsin
Illinois
Minnesota
Libra
Mammoth Cave
Kentucky
Winneshiek
Ludlow Township
Allamakee County
Clayton County
Elkader
Postville