Manholes aren't sinking -- frost is lifting the streets around the city
WILLMAR -- People driving around Willmar's rougher-than-usual streets this spring are seeing a demonstration of the tremendous power of water and ice.
Many have probably noticed that many manhole covers in the city seem to be sinking.
That is what it looks like, but the manholes don't rise or fall with the weather, because they extend below the frost line, said Willmar Public Works Director Ron Gilbertson.
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