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The site now accommodates combat units of the Ohio Army National Guard and other reserve components from a few surrounding states for training exercises conducted on weekends.
Retired Lt. Col. Tom Tadsen, who is co-chairman of the site's Restoration Advisory Board, said in the last few years training has increased from 10,000 man hours to over 100,000 per year.
"This is a high-security facility for classified training," he said. "Being a restricted area, it's a perfect site for training."
One of the areas we got to see close-up was the new Mark 10 grenade firing range in the center of the property. It exists on what was once the Winklepeck Burning Grounds, a 200-acre parcel where ammunition components and chemicals were disposed of.
The range is the only one of its kind in the nation. It has three firing lanes measuring 1,500 meters long. A fourth lane will be added when cleanup of a contaminated area is completed.