Xcel Energy Co. has proposed a three-year plan to search all of the state's sewer pipes in order to identify and repair any gas lines that might have breached them, the company said on Friday.
Once the state Department of Public Safety (DPS) gives the go-ahead, Xcel crews will begin scanning sewer pipes looking for gas lines, said Bill Kaphing, the company's vice president of operations. That could be as soon as April 1.
"One way or another, we will clear them all," Kaphing said.
On Feb. 1, a house at 2014 Villard Av. in St. Paul's Highland Park neighborhood was destroyed after a gas line that had accidentally been bored through a sewer pipe blew up and triggered a fire, injuring a drain service worker. Four days later, the DPS ordered Xcel to come up with a plan to identify all gas lines in the state that have similarly breached sewer lines and to fix them.
The order carried a deadline of Friday and the onus of a $1 million fine for failing to comply.
The initial part of the plan focuses on St. Paul, Kaphing said, because that's where most of Xcel's gas lines have been moved, mostly as part of the city's massive storm water and sewage separation project.
Simultaneously, hospitals, schools and churches served by Xcel's Northern States Power Co. subsidiary also will be checked, he said. That goes a step beyond the order because it includes those in North Dakota.
It's not clear right how much the inspections -- which entail flushing the sewer pipes, then using a special video camera to scan them -- is going to cost or how Xcel will recover those costs, Kaphing said.