Lost Mound Unit - The Savanna Army Depot is located in southwestern Jo Daviess and
northwestern Carroll Counties,Illinois. Founded in 1917, it was used for military
munitions manufacturing,testing, storage and recycling.
The 13,062 acre area contains about 7,262 acres of uplands and 5,800 acres
of bottomlands. The entire area is listed as a statewide significant natural area by the Illinois Natural Areas Inventory. At least 45 Illinois endangered
and threatened plant and animal species have been observed