Projects

Mary Carter Greenway Trail Updates

Starting July 14, the Mary Carter Greenway Trail will have intermittent FULL CLOSURES under the South Platte River Bridge for the replacement of the existing east and westbound bridges as part of the C-470 Express Lanes Project.

Notification of FULL CLOSURES will be given HERE.

When the Mary Carter Greenway Trail is closed at the South Platte River Bridges, follow the posted detour signs. The western detour is approximately 3.2 miles, which is 0.3 miles longer than original route. The eastern detour is approximately 3 miles, which is 1 mile shorter than original route.

Western Detour: Follow the Columbine Trail along Chatfield Avenue and Platte Canyon Road. Take the Mineral Trail along Mineral Avenue to connect back onto the Mary Carter Greenway Trail. This detour is approximately 3.2 miles, which is 0.3 miles longer than the original route.

Eastern Detour: Follow the Highline Canal Trail to Southpark Lane. Take the Mineral Avenue Trail. After crossing Santa Fe Drive, continue on the Railroad Spur Trail onto Mary Carter Greenway Trail. This detour is approximately 3 miles, which is 1 mile shorter than the original route.  

Unless noted above, the trail will be open and available to use. While work is being performed under the South Platte River Bridges and when a full closure is not required, flaggers may be present to guide trail users safely through the work zone. Please be cautious and obey flagger instructions.

C-470 Express Lanes

c 470 express lanes

What's New?

Project construction officially started on November 1, 2016. Travelers should be seeing work between Lucent and Quebec which includes trail reconstruction, temporary barrier and restriping, earthwork and drainage operations, detour paving, retaining wall construction, and Intelligent Transportation System (ITS) work on east and westbound C-470. In addition, work is now taking place between Wadsworth and Santa Fe.  

Crews continue to work day and nighttime shifts on the demolition and associated work required for the widening of the Broadway, University, and Big Dry Creek bridges to accommodate the addition of the express lanes.

Erickson is the next bridge scheduled for widening and is expected to start mid-summer. Flatiron|AECOM, LLC will also begin bridge demolition and reconstruction of the east and westbound South Platte River bridges. These are the only two bridges that will be completely rebuilt as part of this project. During construction, the Mary Carter Greenway Trail will have intermittent flagging operations and full closures under the South Platte River Bridge with two detours available for trail users. (See information above.)

Photo of the Week: 

Drainage pipe installation near the Mary Carter Greenway Trail.

 

Activities and Lane Closures for 7/20/17 - 7/29/17*

Daytime Lane Closures

  • Thursday (7/20)-Saturday (7/22) 9am-3:30pm: Eastbound C-470 Colorado on-ramp and University on-ramp partial closures for ramp construction.
  • Thursday (7/20)-Friday (7/21) 8am-3:30pm: Northbound Colorado right lane closure for conduit boring.
  • Thursday (7/20)-Friday (7/21) 8:30am-3:30pm: Northbound and southbound Lucent alternating single right and left lane closures for ITS potholing and boring.
  • Sunday (7/23)-Friday (7/28) 9am-3pm: Eastbound and westbound C-470 Broadway on-ramp and University on-ramp partial closures for temporary ramp widening.
  • Monday (7/24)-Saturday (7/29) 9am-1pm: Southbound University single left lane closure for bridge construction.
  • Monday (7/27)-Friday (7/28) 8:30am-3:30pm: Northbound and southbound Lucent alternating right and left lane single lane closures for ITS potholing and boring.
  • Tuesday (7/25)-Thursday (7/27) 8am-3:30pm: Northbound Colorado right lane closure for boring of conduit.

Nighttime Lane Closures

  • Thursday (7/20) 10pm-5:30am and Friday (7/21) 10pm-7am: Eastbound and westbound C-470 alternating single right and left lane closure for median  widening earthwork, setting of temporary barrier, bridge construction, and inlet cleaning.
  • Thursday (7/20) 7pm-5:30am and Friday (7/21) 7pm-8am: Eastbound C-470 alternating  single right and left lane closures for setting of temporary barrier and median preparation.
  • Thursday (7/20) 8pm-5:30am and Friday (7/21) 8pm-8am: Westbound C-470 alternating single right and left lane closures for setting of temporary barrier and median preparation.
  • Thursday (7/20) 7pm-5am and Friday (7/21)-Saturday (7/22) 7pm-7am: Northbound and southbound University alternating double left and right lane with sidewalk closures for bridge construction, and northbound and southbound Broadway alternating double left and right lane with sidewalk closures for bridge deck demolition and ITS potholing and boring.
  • Friday (7/21) 10pm-5am: Westbound C-470 Lucent off-ramp FULL CLOSURE for barrier placement.**
  • Thursday (7/20)-Friday (7/21) 10pm-5:30am: Eastbound C-470 Santa Fe on-ramp partial closure for inlet cleaning.
  • Sunday (7/23)-Friday (7/28) 7pm-5:30am: Eastbound and westbound C-470 alternating right and left single lane closures for setting of temporary barrier, median prep, equipment mobilization, median widening earthwork, and bridge construction.
  • Sunday (7/23)-Friday (7/28) 7pm-5:30am: Northbound and southbound University alternating double right and left lane with sidewalk closures for bridge construction.
  • Sunday (7/23)-Friday (7/28) 7pm-5:30am: Northbound and southbound Broadway alternating double right and left lane with sidewalk closures for bridge demolition and ITS potholing and boring.
  • Thursday (7/27) 8pm-5am Westbound C-470 Broadway on-ramp FULL CLOSURE for setting of temporary barrier.**
  • Thursday (7/27) 10pm-5:30am: Eastbound C-470 Santa Fe off-ramp FULL CLOSURE for striping and setting of temporary barrier.**

Note: The traffic control supervisor determines if closures need to be adjusted to provide a safe method of handling traffic conditions if curves, hills, etc. are present. *All lane closures are weather dependent. **Be sure to follow posted detour signs during ramp full closures.


See a brief overview of the April 2017 open house.


Project Overview

The C-470 Express Lanes project will increase mobility and user choice along 12.5 miles of C-470 between I-25 and Wadsworth Boulevard. The $276 million project includes the following improvements:

  • Mobility Improvements:
    • Two additional westbound Express Lanes constructed from I-25 to Colorado Boulevard, and one additional Express Lane from Colorado Boulevard to Wadsworth.
    • One additional eastbound Express Lane constructed along the length of the project, between I-25 and Wadsworth Boulevard.
  • Additional safety and infrastructure improvements:
    • full reconstruction of existing pavement
    • new auxiliary lanes at selected locations
    • on- and off-ramp improvements
    • realignment of substandard curves
    • widening of existing bridges
    • replacing the bridges over the South Platte River

Funding

The project is funded by $110.6 million in combined state and federal funding, and $10 million from Douglas County. The remainder will be funded via a loan repaid by toll revenues from the Express Lanes.


About Express Lanes

The C-470 Express Lanes project will add Express Lanes in addition to the existing, free general-purpose lanes. Drivers will always have a choice of using the free existing lanes or paying a toll to use the Express Lane.

There will be no HOV/carpool lanes within the C-470 corridor.

Express Lanes increase roadway capacity and help to manage congestion on highways. The use of toll pricing during peak travel times reduces delays, manages congestion and maintains reliable travel times. Express Lanes are currently open on:

For more information, visit CDOT's Express Lanes website

You can also find lane closure information any time.

Colorado: The Official State Web Portal