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I-670 to be closed this weekend for Grand Boulevard bridge demolition

Missouri Department of Transportation workers used pylons and signs to close the Grand Boulevard Bridge over Interstate 670 May 6 in downtown Kansas City. An emergency inspection prompted the closing of the bridge. Transportation officials said in a news release that the bridge, south of the Sprint Center, had last passed inspection in September, but was “exhibiting signs of stress fractures and closed for further inspection and possible repairs.”
Missouri Department of Transportation workers used pylons and signs to close the Grand Boulevard Bridge over Interstate 670 May 6 in downtown Kansas City. An emergency inspection prompted the closing of the bridge. Transportation officials said in a news release that the bridge, south of the Sprint Center, had last passed inspection in September, but was “exhibiting signs of stress fractures and closed for further inspection and possible repairs.” dpulliam@kcstar.com

The broken Grand Boulevard bridge over Interstate 670 will be coming down this weekend.

Crews will close I-670 in both directions beginning at 8 p.m. Friday so that they can demolish the bridge, which has been closed since early May. The interstate, on the south side of the downtown loop, will reopen to traffic no later than 5 a.m. next Monday.

Crews will use backhoes to chip away at the bridge’s concrete and metal.

During the closure, traffic will be detoured along Interstate 70 on the north side of the downtown loop.

The demolition work starts the same night as the Def Leppard concert at the Sprint Center. The concert, which also features REO Speedwagon and Tesla, begins at 7 p.m.

Concertgoers who park south of I-670 should use Walnut Street to the west.

During construction of the replacement bridge, the following closures will be in effect:

▪ The left lane of eastbound Truman Road will be closed between Walnut and McGee streets from 8 p.m. Tuesday through Dec. 1.

▪ Truman Road westbound will be closed between Oak and Walnut streets from 8 p.m. Tuesday through Dec. 1.

▪ The left lane of westbound I-670 between Oak and Main streets will remain closed after the demolition through Oct. 10.

Other lane closures are expected through the duration of the project.

The ramp to eastbound I-70 from eastbound Truman Road at McGee will remain open this weekend and throughout the construction of the replacement bridge.

During construction of the new Grand Boulevard bridge, pedestrians will continue to be detoured west to Walnut Street, while traffic will continue to be detoured east to Oak.

Transportation officials closed the bridge in early May after an inspection revealed cracks and falling concrete chunks. The bridge’s failure was a puzzle to transportation officials, who said they had never seen a bridge fail this way.

The Missouri Department of Transportation has awarded a nearly $3.5 million emergency contract to Clarkson Construction for the project.

The Kansas City Council in July approved a measure that would allow it to spend up to $1.2 million in capital improvement sales tax dollars to widen the downtown bridge and do other upgrades for pedestrians, bicyclists and aesthetic benefits.

The extra money on top of the basic bridge replacement cost, which the state will cover, would allow for 12-foot-wide sidewalks, widened curb ramps, pedestrian signal push buttons, bike lane striping, enhanced fencing and reinstallation of existing pedestrian art on the bridge.

The new bridge is expected to be rebuilt by Dec. 1.

Robert A. Cronkleton: 816-234-4261, @cronkb

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