onMain fairgrounds redevelopment to kick off with Roundhouse renovation project

The Roundhouse at the old Montgomery County Fairgrounds sits on a hill across from Miami Valley Hospital. The city of Dayton is in the background. JIM NOELKER/STAFF

Credit: JIM NOELKER

Credit: JIM NOELKER

The Roundhouse at the old Montgomery County Fairgrounds sits on a hill across from Miami Valley Hospital. The city of Dayton is in the background. JIM NOELKER/STAFF

The redevelopment of the former Montgomery County Fairgrounds on South Main Street in Dayton takes a significant step forward this week when work begins on the historic Roundhouse.

The Roundhouse, an iconic part of the former fairgrounds, will be stabilized and the outside will be renovated.

“We are excited for our community to see work begin on this project,” said Brian Heitkamp, CEO of onMain, which is a partnership between the University of Dayton and Premier Health to transform the 38-acre site. “The Roundhouse holds a special place in the hearts of many, and we are committed to its preservation.”

COVID-19 testing lines rap around the landmark "roundhouse" barn at the old Montgomery County Fairgrounds Tuesday Jan. 4, 2022. People who want to be tested have picked-up the last couple of weeks on the old fairground site. JIM NOELKER/STAFF

Credit: Jim Noelker

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Credit: Jim Noelker

onMain says the building’s exterior wood facade will be repaired and painted, including its sheathing, battens and trim.

The work will be paid for using $900,000 in funding that U.S. Rep. Mike Turner, R-Dayton, helped obtain through a previous federal appropriations bill.

The fairgrounds site has sat empty for years since the Montgomery County Fair relocated to Jefferson Twp. in 2018. The site’s agricultural buildings, grandstands and other structures were demolished.

onMain says the renovation of the exposition building is the first visible work to occur on the site, but there will be more activities in coming months when roadways, utilities, sidewalks and parks are installed.

The historic Roundhouse at the old Montgomery County Fairgrounds will be preserved during redevelopment of the land. LISA POWELL / STAFF

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The onMain vision for the fairgrounds property is a mixed-use site that offers commercial, residential and green spaces that attracts a lot of investment and new jobs related to research, technology, aviation, national defense and advanced manufacturing.

The first phase of the project is expected to cost about $133 million and would create a new 120,000-square-foot Digital Transformation Center and around 170 new rental housing units.

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