Construction workers level dirt and stone August 12, 2015, on Dover Air Force Base, Del. Before laying the concrete boxes, a level and sturdy base must be set to ensure minimal shifting occurs during the lifetime of the culverts. The work is part of a $98.3 million runway repair project. (U.S. Air Force photo/Senior Airman Jared Duhon)
Charles Rogers, Allan Myers construction worker, seals concrete box seams with tar August 12, 2015, on Dover Air Force Base, Del. Once dried, the boxes will then be covered and compacted with dirt to guarantee the culvert does not fluctuate over time. The work is part of a $98.3 million runway repair project. (U.S. Air Force photo/Senior Airman Jared Duhon)
Construction workers finesse a concrete box into position August 12, 2015 on Dover Air Force Base, Del. during Dover AFB’s $98.3M runway repair project. Each section of the culvert is placed, cinched, tarred, covered with dirt and compacted to ensure storm water does not leak and is effectively drained off the airfield. (U.S. Air Force photo/Senior Airman Jared Duhon)
William Showacre, Allan Myers construction worker, writes on the concrete box culverts August 12, 2015, on Dover Air Force Base, Del. during Dover AFB’s $98.3M runway repair project. The numbers signify the location and number of concrete boxes used in the current culvert section. (U.S. Air Force photo/Senior Airman Jared Duhon)
An excavator removes concrete piping August 12, 2015, on Dover Air Force Base, Del. during Dover AFB’s $98.3M runway repair project. The old culvert material consists of hundreds of feet of reinforced concrete piping which is being replaced with a stronger, larger concrete box design. (U.S. Air Force photo/Senior Airman Jared Duhon)
A crane operator maneuvers a concrete box on the flight line August 12, 2015, on Dover Air Force Base, Del. Workers will replace more than 3,705 feet of reinforced concrete piping with concrete box culverts during the construction project. The work is part of a $98.3 million runway repair project. (U.S. Air Force photo/Senior Airman Jared Duhon)