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Savanna District


The Savanna District office is located in the Ingersoll Wetlands Learning Center, located just north of Thomson, Illinois. There are exhibits and a small gift shop in the Visitor Center. Savanna District manages Pools 12, 13 and 14 on the Upper Mississippi River National Wildlife and Fish Refuge.

Address: 7071 Riverview Road, Thomson, IL 61285

  • Staff Numbers

    Address:  7071 Riverview Road, Thomson, IL  61285

        815 273 2732
    District Manager          ext 111
    Asst. District Manager ext 113
    Federal Wildlife Officer ext 114
    Visitor Services Manager ext 116
    Wildlife Biologist     ext 117
    Administrative Technician ext 112
    Maintenance Mechanic 815 273 3153
    Wildlife Refuge Specialist/Lost Mound  815 273 3184
  • Lost Mound Unit

    Lost Mound Unit

    The Lost Mound Unit of the Refuge is the old Savanna Army Depot.

    The area contains about 7,000 acres of uplands including the largest remnant sand prairie in the state, and 5,500 acres of bottomlands and is listed as a statewide significant natural area by the Illinois Natural Areas Inventory. At least 47 Illinois endangered and threatened plant and animal species have been observed at the Depot.

    The unit derives its name from a prominent geologic feature, Lost Mound, located in the adjacent bluffland.

    The Depot was used as an artillery test firing site from 1918-1919 and as an ammunition recycling, storage and testing facility from 1919-2000.

    Loggerhead shrike and grasshopper sparrows have been seen on the prairies of the Lost Mound Unit.

Last Updated: Aug 28, 2015
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