|Midewin National Tallgrass Prairie|
|Location||Will County, Illinois, United States|
MIDEWIN NATIONAL TALLGRASS PRAIRIE Latitude and Longitude:
|Area||18,226 acres (73.76 km2) |
|Governing body||U.S. Forest Service|
The Midewin National Tallgrass Prairie (MNTP) is a tallgrass prairie reserve and United States National Grassland operated by the United States Forest Service. The first national tallgrass prairie ever designated in the U.S. and the largest conservation site in the Chicago Wilderness region, it is located on the site of the former Joliet Army Ammunition Plant between the towns of Elwood, Manhattan and Wilmington in northeastern Illinois. Since 2015, it has hosted a conservation herd of American bison to study their interaction with prairie restoration and conservation.
Midewin remains the only federal tallgrass prairie preserve east of the Mississippi River, where surviving areas of that habitat are extremely rare. With the adjacent Des Plaines Fish and Wildlife Area and a number of other state and county protected areas in the immediate area, Midewin forms the heart of a conservation macrosite totaling more than 40,000 acres of protected land.
The pre-European settlement vegetation map of Midewin shows most of the site was prairie prior to the arrival of European settlers.  The northwestern corner of the site along Jackson Creek was forest. Another small, forested area existed in the extreme southwest corner of Midewin along the Kankakee River and Prairie Creek.
Several not-for-profit conservation organizations have played active roles in the restoration of high-quality tallgrass prairie, dolomite prairie,  sedge meadows, swales and related communities at Midewin. These include the Wetlands Initiative, Openlands, and the Illinois chapter of The Nature Conservancy and several other members of the Chicago Wilderness collaborative.   
The name Midewin ( //, mi-DAY-win) is a Potowatomi Native American word referring to the tribe's healers, who it was believed also kept the tribal society in balance. Research since the establishment of the park has found evidence of a pre-European–contact village (c. 1600) from the Oneota culture in a place on the site called Middle Creek. 
The Illinois Land Conservation Act (Public Law 104-106) created the Midewin National Tallgrass Prairie, designated the transfer of 19,165 acres (7,756 ha) of land in Illinois from the U.S. Army to the U.S. Department of Agriculture's Forest Service.
The Illinois Land Conservation Act mandates that Midewin be managed to meet four primary objectives:
- To conserve, restore, and enhance the native populations and habitats of fish, wildlife, and plants.
- To provide opportunities for scientific, environmental, and land use education and research.
- To allow the continuation of existing agricultural uses of lands within Midewin National Tallgrass Prairie for the next 20 years, or for compatible resource management uses thereafter.
- To provide recreational opportunities that are compatible with the above purposes.
The first land transfer from the Army to the Forest Service took place on March 10, 1997, and included 15,080 acres (6,100 ha) of land that was believed to be free from contamination. Subsequent land acquisitions place the current size of Midewin at about 20,000 acres (8,100 ha).
In 2015, the prairie approved the use of 1,200 acres to establish a conservation herd of American Bison. The 20-year plan will study the relationship between the historic large grazing animal, which almost became extinct, and prairie restoration and health. In October, a herd of 27 bison were introduced. Four bulls were transferred from the U.S. Department of Agriculture's Animal and Plant Health Inspection Service, Fort Collins, Colorado, and 23 cows were obtained from a ranch in Gann Valley, in Buffalo County, South Dakota. This is the first U.S. Forest Service project of its kind.   By late spring 2017, births had increased the size of the herd to around 50. 
After a period of ecological restoration, part of the prairie opened to visitors in 2004.
Today, over 7,000 acres (2,800 ha) of the reserve are open, with public trails for non-motorized recreation. The MNTP headquarters entrance is located on Illinois Route 53, near the center of the preserve.
- "Midewin National Tallgrass Prairie". Geographic Names Information System. United States Geological Survey. Retrieved December 22, 2012.
- "Land Areas of the National Forest System" (PDF). U.S. Forest Service. January 2013. Archived from the original on February 21, 2013. Retrieved December 22, 2012.
- "Pre-European settlement vegetation map". Exhibits.museum.state.il.us. Retrieved 2013-07-27.
- "Dolomite Prairie". Illinois State Museum. Retrieved 2013-07-27.
- "Midewin National Tallgrass Prairie". The Wetlands Initiative. Archived from the original on 2013-12-06. Retrieved 2013-07-27.
- "Midewin National Tallgrass Prairie". Openlands. 1996-02-10. Retrieved 2013-07-27.
- "Midewin National Tallgrass Prairie | The Nature Conservancy". Nature.org. 2013-07-12. Retrieved 2013-07-27.
- Vaisvilas, Frank. "Midewin prairie dig may unearth clues about ancient culture that disappeared, researchers hope". Daily Southtown. Retrieved 2018-07-12.
- Megan, Graydon (2013-01-16). "William Cullerton, 1923-2013 WWII pilot, entrepreneur, radio host and well-known outdoorsman championed conservation". Chicago Tribune. Retrieved 2013-01-25.
- Chicago Tribune (24 October 2015). "Midewin preserve now home for bison, back 'after a few thousand years'". Daily Southtown.
- "Bison to roam Midewin prairie again". my.chicagotribune.com. Retrieved March 29, 2015.
- Lafferty, Susan DeMar (May 28, 2017). "More baby bison born at Midewin". chicagotribune.com. Retrieved 2017-09-23.
- usda.gov: Text of Illinois Land Conservation Act of 1995 — law establishing Midewin National Tallgrass Prairie.
|Wikimedia Commons has media related to Midewin National Tallgrass Prairie.|
- US Forest Service site for Midewin National Tallgrass Prairie
- " A Midewin Almanac", blog covering the restoration of the site
- The National Forest Foundation: "Restoration and Conservation Plan for Midewin National Tallgrass Prairie" — (2011 plan)