Why Jefferson Proving Ground Shapes Today’s Data Center Debate

The proposed hyperscale data center would occupy approximately 549 acres of former proving ground land.

(Jefferson County, Ind.) - There has been a lot of discussion about Jefferson Proving Ground in recent months, yet many people are unfamiliar with what it is, where it’s located, and why it remains such an important part of Southeastern Indiana’s story.

Located along U.S. 421 South near Madison, Jefferson Proving Ground encompasses 55,264 acres stretching roughly 17 miles long and three miles wide.

Miles of barbed-wire fencing mark the boundaries of a site that forever changed the region.

In the 1930s, the U.S. War Department began searching for land east of the Mississippi River to use as an artillery and bombing range for testing ordnance. Indiana was selected because of its central location, low population density, relatively flat terrain, and affordable land. The selection process was conducted largely in secret, and residents had little indication their property was under consideration.

Before the Army arrived in 1940, the area was home to generations of farming families.

The land, once inhabited by Shawnee people and later settled by pioneers, contained homes, schools, businesses, churches, cemeteries, and tightly connected rural communities spread across Jefferson, Jennings, and Ripley counties.

That changed abruptly on November 6, 1940, when landowners were notified to vacate and acquisition of the properties began.

Many families were given as little as 30 to 120 days to leave. The government typically offered about $90 per acre, leaving residents with no choice but to accept. More than 2,000 people were forced to move as entire communities disappeared within months.

The impact was both financial and deeply emotional. Families lost homes that had been passed down through generations, and many longtime residents suffered from those memories for the rest of their lives.

The first test round at Jefferson Proving Ground was fired on May 10, 1941.

In less than six months, former homesteads had been transformed into a military testing site. Residents who were children at the time still recall the upheaval, the loss, and the emotional toll the transition took on families.

Over the following decades, Jefferson Proving Ground became a significant part of the nation’s defense efforts.

Millions of rounds were tested and exploded there during World War II and subsequent conflicts before the facility closed in 1995. Even after operations ended, however, the land did not simply return to normal. Portions of the property remain restricted because of asbestos, lead, depleted uranium, and PFAS contamination and the continued presence of unexploded ordnance in the ground and vegetation.

Out of that complicated history emerged one of Indiana’s most unique natural areas.

In 2000, much of the former proving ground became part of the Big Oaks National Wildlife Refuge. Today, the refuge covers roughly 50,000 acres with more than 200 species of birds and 46 species of mammals managed by the U.S. Fish and Wildlife Service while the Army retained ownership. Under the agreement, USFWS is responsible for operating and managing the refuge. But after more than 25 years, there is the fear that the wildlife service will cancel the agreement. In response to an IndyStar question about a potential refuge closure, a USFWS spokesperson said the service's "regional leadership is currently engaged in discussions with the U.S. Army's Jefferson Proving Ground regarding our existing memorandum of agreement."

That history helps explain why current development plans are receiving such close scrutiny.

Recent local reporting indicates that a controversial Madison-area data center project is moving forward. The proposed hyperscale data center would occupy approximately 549 acres of former proving ground land near the refuge and include multiple buildings totaling about 7.1 million square feet.

Concerns extend beyond environmental impacts, although those remain significant.

Data centers typically require large amounts of electricity and, depending on their design, substantial water resources for cooling. Residents have also raised questions about noise, traffic, emergency services, and whether a largely rural county is prepared for a project of this scale.

Supporters point to potential tax revenue, construction jobs, and infrastructure improvements. Opponents argue that many questions remain unanswered, including who will ultimately operate the facility, how much power and water it will require, and what the long-term effects could be on nearby communities.

The story of Jefferson Proving Ground serves as a reminder that decisions made about this land can shape local life for generations.

In the 1940s, communities were sacrificed for a wartime mission, with little public input. Today, critics of the data center project argue that important decisions are again being made without enough transparency. Public meetings this spring drew large crowds and passionate disagreement.

When residents ask questions about the proposed data center and possible refuge closure, they are asking what kind of future this land will have. And for many people in southeastern Indiana, the issue feels very personal.