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Fault of failed concrete in HL is shared by contractors and supplier

August 25, 2008

By Jennifer Gallus
Staff Writer

About 2,000 feet of new curb and gutter, sidewalks, and driveway aprons that were installed last fall are currently being ripped out along Wright County Road 6 in Howard Lake.

The replacement is due to the fact that the concrete was chipping and experiencing rock popouts – essentially failing.

According to discussion at Tuesday’s council meeting, tests of the failed concrete revealed that the concrete mix supplied by Knife River did not meet the required MnDOT standards of being composed of 50 percent granite.

In fact, no granite was found, rather a lot of “soft rocks,” according to City Engineer Barry Glienke.

“There was no class A aggregate,” (in the mix), Glienke said.

Workmanship issues were also to blame for poor performance, which is being shared between the contractor Sundblad Construction and a sub-contractor French Lake Curb Company.

The fault of the failed concrete was, “A workmanship issue and a supplier issue. They’re mutually sharing the expense of mitigation,” Glienke said.

That amount, to be absorbed mutually amongst the supplier and contractors, to replace the failing concrete is estimated at about $60,000, according to Glienke.

Glienke explained that the city is not obligated to conduct batch inspections of the concrete while it is being poured.

Odds and ends

In other business, the council:

• was given a session update from State Representative Dean Urdahl.

• approved a request by the Wright County Agriculture Society for a 3.2 malt liquor license for a tractor pull scheduled for Saturday, Aug. 23.

• heard from the police department that it conducted a safety training exercise at the new high school.

• acknowledged the Orphans for the great baseball season it had.

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