Concrete Repair in Lake Elmo, Minnesota.

Three road authorities run the right of way in Lake Elmo, the city, Washington County and MnDOT, and the city publishes a roadway jurisdiction map because which one owns the frontage decides who issues the permit. Anybody working in the city's right of way registers with Lake Elmo every year and posts a security before a permit issues. Where a driveway meets an improved street, the city code wants the part inside the road right of way built in asphalt, concrete or another durable material the City Engineer approves. On a state trunk highway the rule is MnDOT's instead, and no driveway is built to or from one until the district engineer signs the permit. The commercial frontage this touches is the I-94 side along Hudson Boulevard, the old village blocks on Lake Elmo Avenue North, and Bridgewater Village on Upper 40th Street.

Four things take concrete apart here, and each one goes after a different part of a property. A sidewalk panel sits on saturated ground or over a root. The water under it freezes, expands and lifts the panel. In spring the ground thaws and settles, and the panel does not go all the way back down with it, so what was flush in October is a lip in April. Then a plow blade catches that lip every storm for five months and breaks the leading edge off it. A curb takes the plow head on. The blade rides up the gutter, catches the curb face and takes the nose off in chunks. Salted slush sits in the gutter longer than anywhere else on the lot, because the gutter is where everything on the lot drains to, so the gutter is where the surface scales first. De-icer does the same thing to flat concrete. Chloride pulls water into the surface and runs more freeze and thaw cycles through it in a season than the weather would on its own. The mortar skin comes off in flakes and the aggregate stands proud. The approach at the street is a joint between two slabs that belong to different people. The street sits on a road section and a deep base; the drive sits on whatever was there. Frost gets under the shallower one first, the apron cracks along the gutter line, and that crack takes water into the base under both of them.