After a temporary fix of a collapse of a sewer main that runs from the Eagle Lake City Hall to the intersection of Madison Avenue and Haefner Drive failed, plans to replace the line have been moved far forward.

Mankato Public Works Director Jeff Johnson said, “We had a fairly large rainstorm and it’s believed that…there was increased pumping activity which caused the temporary repair to fail.”

Mankato City Manager Pat Hentges said they expected the project to cost about $1.5 million, and the low bid came in much lower than that and, “The actual charge is $877,000, including associated capitalized interest, bond administration costs, and, of course, engineering, design, and inspection.”

The City of Mankato will cover three-quarters of the cost and the City of Eagle Lake will cover the rest. Construction is expected to begin next month and the project completed by December.

The two communities had been discussing the sewer line in connection with a possible extension of Adams Street in 2022.