CDOT Media Release

Bridge Demolition to Close I-25 Near 104TH Avenue Next Week

ADAMS COUNTY – The Colorado Department of Transportation (CDOT) recently completed the center portion of the new 104th Avenue bridge over I-25. With two thirds of the new bridge complete, crews will be realigning eastbound 104th Avenue onto the new bridge this week and demolishing the final third of the existing bridge.

“We have now completed two thirds of the new structure and will be removing all traffic from the old bridge this week,” said CDOT Program Engineer John Schwab. “With traffic realigned to the new structure, we can demolish and replace the southern portion of the bridge.”

As a result of the upcoming bridge demolition, there will be various lane closures on 104th Avenue as well as I-25 next week. The following closures will take place Sunday, April 18th through Thursday, April 22nd, weather permitting:
• Sunday, April 18th: All left turn movements from northbound and southbound I-25 to 104th Avenue and from eastbound and westbound 104th Avenue to I-25 will be prohibited from 12 a.m. until 5 p.m. on Sunday for paving.
• Monday, April 19th: A single lane of southbound I-25 at 104th Avenue will be closed at 7 p.m. followed by a full closure from 9 p.m. to 1 a.m. In addition, all lanes of northbound I-25 at 104th Avenue will be closed from 1 a.m. to 5:30 a.m. on Tuesday morning. Crews will be removing a fence on the 104th Avenue bridge over I-25. Detour: Motorists will be detoured via the on and off ramps at 104th Avenue. Uniformed traffic control will be used to direct motorists through the interchange.
• Tuesday, April 20th: The left lane and left turn lane to I-25 will be closed on eastbound and westbound 104th Avenue from 8:30 p.m. to 5:30 a.m. to allow crews to realign eastbound 104th Avenue onto the new bridge.
• Wednesday, April 21st and Thursday, April 22nd: One lane of northbound and southbound I-25 at 104th Avenue will be closed at 7 p.m. with all lanes closing at 9 p.m. for bridge demolition. All lanes will reopen by 5:30 a.m. the following day. Detour: Motorists will be detoured via the on and off ramps at 104th Avenue. Uniformed traffic control will be used to direct motorists through the interchange.

Major delays are throughout the week and alternate routes are strongly advised. CDOT would like to remind motorists to obey all traffic signs and flaggers and to “Slow for the Cone Zone.”

The existing 104th Avenue bridge over I-25 was originally constructed in 1962 and is one of Colorado’s structurally deficient bridges. When complete, the new bridge will accommodate an additional left turn lane from eastbound 104th Avenue to northbound I-25.

Hamon Contractors, Inc. is the contractor for this $6.5 million project scheduled to be complete by the end of January 2011. CDOT is funding the bridge replacement and the Northglenn Urban Renewal Authority (NURA) is funding the aesthetic improvements which will include upgraded bridge rail and upgraded bridge lighting similar to the existing lighting on the 112th Avenue overpass bridge. Aesthetic improvements also include cornerstone monuments at the four ends of the bridge and “Northglenn” monument signage mounted to an upgraded retaining wall.