I-270 & US 36 Bridge Preventative Maintenance

About the Project

The I-270 Bridge Preventative Maintenance Phase 2 project includes replacing modular joints, bridge joints, approach panels and ground stabilization.

This work consists of

• Saw cutting
• Removing and disposing of existing deteriorated bridge deck and approach slab concrete for structures
• Inlet protection installation in all of the bridge inlets.

The project locations:

• I-25/I-270: northbound I-25 on-ramp from I-270 at MP 217
• US 36: starting at MP 57 over I-25, structure E-17-QA and E-17-QJ 

Removal operations shall be conducted so that the traveling public is protected, and so that interference with the traveling public using the structure is minimized.

Work starting March 1 will extend structure life and improve safety for motorists Adams County — The Colorado Department of Transportation and its contractor ABCO Contracting, Inc. will begin Phase 2 of planned preventative maintenance of the I-270 & US Highway 36 bridge over I-25. This project will perform ground stabilization and replace critical bridge components, extending the lifespan of the bridge and ensuring long-term structural integrity.

Starting the night of March 1, crews will begin repairs to the eastbound lanes of US 36 at Mile Point 57 over I-25. Work involves removing deteriorated bridge deck concrete and installing new approach slabs and joints. Crews will move west across the bridge as work progresses.

Beginning the week of March 30, work will expand to include the southbound I-25 off-ramp to eastbound I-270 at MP 217.

Project Benefits

• Smoother, more comfortable road surface, making travel safer for vehicles, especially in inclement weather.
• Better drainage and weather resilience, preventing clogging from debris and helping avoid water pooling, hydroplaning risks, or flooding.
• Extended lifespan of existing structures, reducing the need for more extensive and disruptive replacements in the future.
• Ground stabilization and updated joints improve infrastructure efficiency and environmental impacts.

Work Schedule

Different from the traffic impacts, this should be the general working hours and schedule of the project. Example:

• Work will last for 360 working days or approximately 18 months
• Working hours are 30 minutes after sunrise to 30 minutes before sunset, Monday to Friday
• Some overnight and weekend work is expected

Traffic Impacts

• Traffic will be shifted to one lane on eastbound US 36 starting at MP 57 with single lane closures through October. A minimum of one lane of traffic will remain open throughout the project.
• Nighttime work hours range from 10 p.m. to 6 a.m., Sunday through Thursday
• Daytime work hours range from 7 a.m. to 7 p.m., Monday through Friday
• Motorists are advised to drive with extreme caution as the travel lanes will be narrowed and crews with heavy equipment will be working in the area.
• Minor traffic delays are expected.
• Refer to COtrip.org for real-time travel conditions and road closures