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Construction begins on C-470 interchange

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Contributed by: Colo. Dept of Transportation on 11/12/2007

On Nov. 12, the Colorado Department of Transportation (CDOT) along with Sema Construction, Inc., will start to mobilize equipment for construction of a new full diamond interchange at C-470 and Alameda Parkway. This $14.2 million new interchange construction project is being funded by a partnership between the Green Tree Metro District No. 1, city of Lakewood and Jefferson County.

"Due to the project's proximity to C-470, we have been working closely with the project sponsors, planning and designing the new interchange." said CDOT's Regional Traffic and Safety Engineer Tony DeVito. "Now that construction is starting, CDOT's involvement is to maintain oversight of the highway lane closures and project progress."

Construction includes widening lanes on Alameda Parkway approaching the interchange, widening the bridge over C-470 by four lanes to accommodate the turn lanes, building of new concrete on and off ramps, retaining walls, new storm drainage, curb and gutter, sidewalks and traffic signals. The new interchange was also designed with special aesthetics, such as unique ornamental railings, pillars and colors.

"This area is a popular hiking and biking spot, and unfortunately the bike path will be impacted," said Roger Jameson, CDOT project engineer. "We plan to make every effort to keep the trails open and accessible for outdoor enthusiasts."

Motorists can expect lane closures to begin the week of Nov. 19 with the majority of the construction performed at night. Lane restrictions on C-470 and on Alameda Parkway will be necessary Sunday through Thursday from 7:00 p.m. to 5:30 a.m.

Plans call for an extended closure of Alameda Parkway during a period of time as construction progresses. At that time detours will be in place and available for motorists still wanting to cross over C-470. Construction of this new interchange is scheduled to be complete and open to traffic June 30, 2008.

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