rumors concerned tunnels under the base and a number of underground hangars behind the barracks of the Signal Corps units. The tunnels and other underground facilities were supposedly flooded after the war. There were reports of an alley that ran behind a cluster of barracks located next to a pronounced slope where numerous bunker entrances were located, all of which were rumored to be locked. Despite any hard evidence, these rumors persisted over the years and stories of hidden Nazi bunkers and tunnels were passed on from one generation of soldiers stationed at Coleman to the next. Location The airport is located 8.5 km (5.28 mi) north of the Mannheim city center in the district of Sandhofen, 2.5 km (1.6 mi) east of the river Rhine and 3 km (1.86 mi) south of Lampertheim. It is surrounded by Autobahn 6 (A6) to the south and a state highway (Bundesstraße 44 (B44)) to the west; the Mannheim–Frankfurt railway train line (between Frankfurt and Mannheim) runs 1.6 km (1 mi) to the east. Runways The airport has one paved runway (900 m (2954 ft) x 20 m (67 ft)). The runway offered Precision Approach Path Indicator and illumination. Discussions were held about extending the runway to 1200 metres, but those plans were withdrawn due to severe protests by nearby residents. The airfield was in use from 06:30 – 23:59 daily. Radar approach had been available since June 2002. Coleman was the only U.S. Army airfield in Germany that had its own approach control zone and provided approach control for several airports in the vicinity, both military and civilian, such as Mannheim City Airport (civilian), Speyer airfield (civilian), Worms airfield (civilian), and Heidelberg Army Airfield (military). Buildings A new state of the art six-story control tower was built in 2004. Besides air-conditioned offices, briefing rooms, restrooms and an elevator, the tower accommodated the Coleman radar approach control room. The facility also hosted a US Army helicopter maintenance facility and the only US Army military prison in Europe, the United States Army Corrections Facility – Europe, which relocated to Sembach as of December 2014. Air traffic When it was the only maintenance base for Sikorsky UH-60 Black Hawk and Boeing AH-64 Apache helicopters in Europe, Coleman Airfield had more take-offs and landings than any other US Army airfield in Germany. The Coleman Aero Club (CAC) was the only U.S. military non-profit flying organization in