Colorado Springs officials provide details of recent closure, repair work on Uintah Street

COLORADO SPRINGS, Colo. (KRDO) -- Two weeks have passed since officials closed four blocks of Uintah Street to repair damage under a bridge over Shooks Run Creek, and we're now learning specifics about the response.

Officials said that the city was the lead entity in the repair response, with Colorado Springs Utilities (CSU) providing a supporting role.

The closure began late in the afternoon of June 10 for what officials described as emergency bridge and utility repairs between Prospect and Institute streets, east of the Colorado College campus.

Officials said that on the previous day, a routine bridge inspection by the Colorado Department of Transportation (CDOT) discovered a large "void," or sinkhole, under the bridge that compromised a utility line.

But officials didn't explain how the void developed or how they repaired it until earlier this week, when Richard Mulledy, the city's public works director, elaborated on the situation.

"It was about a six-foot by eight-foot void," he explained. "That void was really caused by an abandoned storm sewer line and then a leaking manhole. It's something that we see from time to time, but really doesn't happen often."

Crews approached the problem from under and above the bridge, with workers excavating into the street to access the utility lines.

"The utility line being compromised was an active storm sewer line," Mulledy said. "It was sort of hanging out in the open and was unsecured. The old storm sewer line had been abandoned for decades and was starting to fail."

Crews removed the old stormwater pipe, repaired the manhole, and backfilled the void with a material called "flow."

"Flow fills almost like a kind of liquid concrete," Mulledy detailed. "And that's a really great structural solution. So, we filled that entire thing up, made sure the void is closed, and made sure it's structurally sound."

He added that the bridge is around a century old, the same age as most bridges across the creek.

"This was identified and got fixed in 48 hours, rather than let something structural fail, and then we'd be in a big, giant construction project," Mulledy said. "The structure itself, I don't think, was ever really threatened."

The closure ended on Saturday, June 13.