Crews fill 40-foot sinkhole after North St. Louis intersection collapsed

ST. LOUIS — Crews from the St. Louis Metropolitan Sewer District spent hours filling a large sinkhole with concrete in northern St. Louis on Friday.

Heavy rains last weekend caused a major road to collapse at the intersection of Blair Avenue and Ferry Street, causing the crater.

Public affairs specialist Sean Stone estimated that nearly 200 cubic meters of concrete would be needed to fill the hole.

He added that about 20 to 25 feet down where a sewer runs, there had been some deterioration and a hole had formed.

Some of the water that would normally enter the system began to spill out. It washed away the ground under the road and around it causing a breakdown.

Stone pointed out that, why a hole may not always be this size, it is forced to form due to water and age.

“Some of the infrastructure under the city is 150 years old. Stuff that goes back to the Lincoln administration. It’s the age of some of these things, so things deteriorate over time,” Stone said.

MSD has an ongoing assessment routine to detect holes in the city before they become too serious.

They run cameras deep into the holes under the ground to assess the condition.

“We had a crew here on June 3 and we noticed the deterioration along this manhole, and we were going to be here next week probably doing a repair. One big rain event is enough for that to happen,” Stone said.

Although the magnitude of a storm can be difficult to predict,
the entity relies on residents to speak up when a problem arises.

There is still work to be done by the city.

Gas, sewer and water lines allowed nearby residents to function.

Friday’s job was to provide security.

A permanent repair schedule is yet to be determined.

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