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Project details:

Map of construction

Map en Espanol

Downtown Bridges timeline

Southwest Trafficway ramp metering

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I-35 Bridges Open to All Lanes Dec. 17

Northbound and southbound I-35 southwest of the Downtown Loop opened to all lanes late afternoon on Dec. 17, concluding one of the most disruptive projects on MoDOT's Kansas City District system.

14th Street Ramp to Eastbound I-70 Opens

The 14th Street ramp to eastbound I-70 opened before afternoon rush hour Wednesday, Oct. 9. The ramp had been closed since Aug. 20 for deck replacement. Admiral Boulevard bridge will close from early Monday, Oct. 14, through Dec. 2 for deck work.

Downtown Bridge Improvements Progressing

More than $40 million in bridge replacement, redecking and rehabilitation projects in one of the most congested areas in the metro area are moving rapidly toward completion. Two MoDOT contracts and a Kansas City project will wrap up this fall, concluding 40 weeks of intense but necessary improvements.

The I-35 bridge over Southwest Boulevard is the largest bridge in MoDOT's 9-county Kansas City District. At 360,342 square feet, (more than 1/3 the size of the total bridge deck area in 3-Trails Crossing), this 67-year-old bridge is being redecked for the first time. Crews are working two 10hour shifts, six days a week to complete the work. Completion is expected late this fall.

Removal of Main Street Bridge Over I-670 Completed

I-670 between I-35 and Route 71 on the south side of the Downtown Loop closed Sept. 13-15 for bridge removal. Main Street bridge also is closed for about two months for bridge replacement, a Kansas City Public Works project.

12th Street bridge, ramps open ahead of schedule

The 12th Street bridge over I-35 and northbound ramps opened Aug. 30, just before Labor Day and about two weeks ahead of schedule. The interchange restores needed access between I-35 and the Downtown Loop.

14th Street Ramp to Eastbound I-70 Opens

The ramp from 14th Street to eastbound I-70, closed Aug. 20 through Oct. 9 for bridge deck replacement, is now open.

Southbound I-35 to 12th Street Ramp Opens

The southbound I-35 ramps at 12th Street opened Friday, Aug. 23, two weeks ahead of schedule. The ramps provide access to and from the West Bottoms at I-35.

Ramp from 10th Street to Southbound Route 71 Opens

The ramp from 10th Street to southbound Route 71 opened Tuesday, Aug. 20. In addition, all lanes of the southbound Route 71 ramp to westbound I-670 are now open.

Bridge, Northbound I-35 Ramps Closed Until September 10

The 12th Street Bridge over I-35 and northbound ramps serving 12th Street closed July 12 for bridge replacement. The bridge and ramps are expected to re-open by September 10.

Bridge Repairs Shift to Southeast Corner of Downtown

The southbound Route 71 ramp to westbound I-670 is reduced to one lane through August 21. The ramp from 10th Street to southbound Route 71 is closed through August 21. The eastbound I-670 ramp to northbound I-35 has re-opened after several weeks to repair the bridge deck.

Work completed in Northeast Corner of Downtown

Major work has concluded. The eastbound to southbound ramp opened May 16, and the northbound to westbound ramp of I-70 opened May 23 in the northeast corner of the Downtown Loop. The southbound Route 9 ramp to eastbound I-70 opened in early June.

Contracts awarded for Downtown Bridge Work

The Missouri Highways and Transportation Commission awarded two new contracts April 2 for bridge work on I-35 southwest of Downtown and for 12th Street bridge replacement over I-35. Clarkson Construction Co. Inc. received a $29,269,885 contract to rehabilitate bridges on I-35 from near the Kansas border to north of I-670, and Pyramid Contractors, Inc. received a $2,127,042 bid for the 12th Street bridge replacement. These follow the earlier award of a $5,098,608 contract to Comanche Construction, Inc. of Olathe for rehabilitation of bridges on I-35 near the Downtown Loop and other areas. The projects will replace bridge decks and improve bridges around the Downtown area.

Kansas City Public Works also will be working on projects in the area and both MoDOT and Kansas City Public Works will coordinate lane reductions, detours and closures to minimize impact on motorists.

What do these projects include?

More than a dozen bridges in and around the Downtown Loop area will be redecked and rehabilitated.

How long will the bridges be closed?

Some bridges will be closed over weekends, some will have lane closures and others will have ramp closures. The bridge on 12th Street will be removed and replaced in July and August.

How will I get around?

During construction, traffic will detour to various routes or be restricted so that one or two lanes can be closed for construction. Because Downtown is already the most congested area for traffic during peak periods, options are few. That's why MoDOT is compressing the work into the shortest time possible.

When will the work take place?

Most work will begin April 15 and some will continue into the late fall.

Why all this work Now?

Some of these bridges were built in 1946, and have never been re-decked. MoDOT has repeatedly repaired these bridges, but they have reached their limit. Waiting much longer risks having to make emergency repairs with much longer closures, or worse, a significant failure.

Couldn't you do this at night, or find some other way to keep more of the highway open?

Re-decking requires removal of the 10-inch concrete deck and side barriers all the way down to steel, then cleaning and replacing some of the steel. That requires lane closures for weeks at a time. Workers may be working two 10-hour shifts, seven days a week to accelerate the work when possible. Once the concrete deck is poured, however, it must cure, which seems like idle time but is a most critical period, when concrete reaches its maximum strength and durability. Properly cured concrete means it will be many years before MoDOT must make repairs.

Why do it all at once?

Once a lane or more is closed, the bottleneck affects all traffic forward of the restriction for miles. It would be inefficient and drag out the projects for perhaps two or more years by not taking advantage of the initial closure.

How do I learn more?

For more information, review the project maps and materials listed in the left column. You can also submit a comment, send an e-mail or give us a call. Lend your voice to the transportation process!

i35 bride

Review more project photos online.

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