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This is why Boise is plugging manhole covers down by the river

Some observant Boiseans noticed that a few manhole covers on low-lying streets and areas near the Boise River Greenbelt have plugs in their holes.

Why? The answer is pretty simple and, like seemingly everything these days, has to do with the insane amount of water gushing down the Boise River.

The city wants to limit the amount of flood water entering its sewer lines so that Boise’s two sewer treatment plants aren’t overwhelmed, said Rob Bousfield of the Public Works Department.

If enough flood water dripped through enough manhole covers, Bousfield said, it could cause the treatment plants to fail. He pointed out, though, that we’re nowhere near that scenario right now.

That’s why the city put cork stoppers in the holes of the manhole covers. Some of the those covers are submerged, Bousfield said.

“It doesn’t have to be entirely drip-proof or anything like that,” he said. “We just want to keep the majority of the water out.”