Crews begin to patch I-270 heavy traffic at Md.

State highway officials said Friday that the Montgomery County cesspool in Maryland near Gaithersburg that continues to frustrate drivers and disrupt traffic on southbound Interstate 270, is 20 feet deep and 30 feet wide under the road.

State highway officials said Friday that the Montgomery County stream near Gaithersburg, Maryland, that continues to frustrate drivers and disrupt traffic on southbound Interstate 270, is 20 feet deep and 30 feet wide under the road.

Maryland State Highway Department spokesman Charlie Geschlar told WTOP that a “30-inch corrugated metal drain pipe” under the road was the problem.



“There is a lot of damage underneath,” Geslar said, noting that storms that sprout through the metropolitan area in the summer can drop 1 to 2 inches of rain per hour and create “a lot of high-velocity moving water” that eats up soil near somewhere tube failure.

He said a 1,000-foot wall would have to be raised while the repairs were being worked on, followed by a safety mechanism “for workers to enter and start work on that precarious area. The work has already begun,” Geslar said.

The stream runs under the driveways in the road.

“So it’s pretty wide down that road over there. That’s why we had to close those two right lanes,” Geslar said.

“We’ll have to go in there and fix the pipe, first of all, but then we put stone No. 57 and the soil and compact it, making sure it’s firm enough. Then we can open the walkways.”

He added that there are a lot of unknowns at the moment to give an estimate of when the work will be completed.

“The good news is that we’re starting to work. But what often happens is that we will find something else down there that could extend the closure of the lanes,” Geslar said.

“I can’t really tag it right now. I don’t want to build hopes and I don’t want to be gloomy and gloomy either,” Geslar said. “I just want to make sure we start work that will make everyone feel better, including us.”

Below is a map of the site area.

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