On October 3, the Missouri Department of Transportation will close Interstate 70 express lanes at 9 a.m. The lanes will remain closed until mid-December. This closure is a part of constructing new ramps between I-70 and the new bridge.
October 7, MoDOT will reopen the Cass Avenue Bridge over I-70. It was closed in 2007 because of safety concerns and was demolished in February 2010.
Work started on a new Cass Street Bridge earlier this year, and it will reopen after a 10 a.m. ribbon cutting ceremony. Regular traffic will be able to use the new bridge to cross over I-70 later that afternoon.
On October 7-10, MoDOT will close the Howard and 9th Street bridge over I-70 to remove it. The department will need to close I-70 between 10th Street and the Poplar Street Bridge during the demolition. The interstate will close at 8 p.m. October 7 and reopen at 5 a.m. October 10.
The ramps from the Poplar Street Bridge to both I-70 and Memorial Drive will be closed while the interstate is closed. If possible, drivers should use I-64 and I-170 to detour around the closure. There will be a detour for local traffic that involves several miles of city roadway and about a dozen city traffic signals.
Finally, crews will permanently close the 10th Street ramp from eastbound I-70 (exit 249A) at 9 a.m. on October 10. Closing this ramp lets crews start constructing new ramps between I-70 and the new Mississippi River Bridge. Drivers who normally use the 10th Street ramp cam use the next exit, Broadway, to access that area.
The new bridge, along with I-70 relocations in Missouri and Illinois, is estimated to cost $667 million and is to be finished in 2015. It will be 2,803 feet long and feature two A-shaped stay-cable supports rising 435 feet above the roadway. More details: http://en.wikipedia.org/wiki/New_Mississippi_River_Bridge