C-470 Express Lanes

Project Facts

  • Location: 12.5 miles of C-470, from I-25 to Wadsworth Boulevard
  • Cost: $276 million
  • adding two westbound Express Lanes from I-25 to Colorado Boulevard, and adding one westbound Express Lane from Colorado Boulevard to Wadsworth Boulevard
  • adding one eastbound Express Lane from just west of the South Platte River to I-25;
  • fully reconstructing a portion of the existing pavement;
  • adding auxiliary lanes;
  • improving portions of on- and off-ramps to current standards (including ramp metering where appropriate);
  • realigning substandard curves;
  • making safety and operational improvements between I-25 and Quebec via direct-connect ramps from I-25 to the westbound C-470 Express Lanes;
  • widening existing bridges throughout the project area;
  • replacing the bridges over the South Platte River;
  • installing water-quality features where required;
  • installing noise barriers where required;
  • installing Intelligent Transportation Systems elements and tolling equipment; and
  • adding grade separations for the multi-use trail at Quebec and Colorado.

Current and Upcoming Work

Wadsworth to Santa Fe:

  • Traffic has been shifted onto new permanent concrete pavement and the newly constructed South Platte River Bridge eastbound between Wadsworth and Santa Fe. Westbound traffic has been diverted onto the new eastbound bridge as well while crews construct the new westbound South Platte River Bridge.
  • Demolition of the old westbound South Platte River bridge is complete.
  • The concrete deck was poured recently for the new westbound South Platte River Bridge.
  • Noise wall, drainage, wall, subgrade work and paving along westbound C-470 between Santa Fe and Wadsworth is on-going.

Santa Fe to Lucent:
Work includes:

  • inlet, lighting and barrier;
  • noise wall construction;
  • continued work on the Erickson bridge; and
  • concrete paving;

Lucent to Quebec:

  • Eastbound and westbound traffic has been shifted onto new permanent concrete pavement between Lucent and Quebec.
  • Concrete paving is on-going.
  • Crews will complete concrete barrier, guardrail, overhead sign installation, and drainage work.
  • Crews will do ITS work (light poles and tolling infrastructure in median).
  • Expect trail work at Colorado and Quebec.

Quebec to I-25:
Work includes

  • earthwork;
  • drainage pond grading and pipe installation;
  • ITS;
  • bridge, retaining wall and drainage work at Yosemite and Acres Green;
  • Willow Creek trail now open;
  • permanent barrier installation;
  • temporary asphalt paving in median and I-25 interchange;
  • installation of overhead signs;
  • bridge construction;
  • More traffic shifts can be expected to move traffic onto new permanent concrete pavement;
  • concrete paving continues.

Lane Closures

Due to increased snowmelt and subsequent water release from Chatfield Reservoir, the Mary Carter Greenway Trail underpass at C-470 will experience intermittent closures when water levels create unsafe conditions for passage on the trail. The project currently has built a diversion pad, which temporarily narrows the river, to allow bridge construction to take place. Once the diversion pad is removed the new trail will no longer experience these conditions. The reconstructed trail was raised approximately 6" and moved away from the waters edge to help prevent trail flooding in the future.

Detour During Closures: Western Detour - Take the C-470 Bikeway Trail west on the south side of C-470 along Chatfield Lake. Continue right to pass underneath C-470 and turn east to stay on the C-470 Bikeway Trail. Join the Columbine Trail after crossing Chatfield Ave. Take the trail north along Chatfield Ave. as it turns into S Platte Canyon Rd. After crossing Mineral Ave. take a right and join the Mineral Ave. Trail, continue on and then connect back onto the Mary Carter Greenway Trail.

Eastern Detour - Follow the Highline Canal Trail east, then turn left on the trail before the Centennial Trail begins and continue as it goes under County Line Rd. Then continue north on the Highline Canal Trail to the bike lane on Mineral Ave. Take Mineral Ave. across Santa Fe Dr., then get on the Railroad Spur Trail back onto the Mary Carter Greenway Trail.

Upcoming Lane Closures:
  • Thursday, September 12 from 10:00 pm to 5:30 am., Friday, September 13 and Saturday, September 14 from 10:00 pm to 7:00 am. Eastbound C-470 full freeway closure from Lucent Blvd. off-ramp to Lucent Blvd. on-ramp. There are no detours, motorists will exit at the off-ramp, continue through the traffic light and proceed back onto C-470.
  • Sunday, September 15 through Thursday, September 19 from 10:00 pm tp 5:30 am., and Saturday, September 21 from 12:00 am to 8:00 am. Southbound I-25, northbound I-25 and southbound E-470 to westbound C-470. Southbound E-470 to westbound C-470 detour: Take southbound E-470 to southbound I-25, exit onto Lincoln Ave, west. Take Lincoln Ave. to Yosemite, turn right. Take Yosemite to westbound C-470 ramp. Southbound I-25 to westbound C-470 detour: Take southbound I-25, exit onto Lincoln Ave, west. Take Lincoln Ave. to Yosemite, turn right. Take Yosemite to westbound C-470 on-ramp. Northbound I-25 to westbound C-470 detour: Take northbound I-25, exit onto County Line Rd. west. Continue on County Line Rd. to Yosemite and turn left. Take Yosemite to the westbound C-470 on-ramp.
  • Sunday, September 15, Monday, September 16, Wednesday, September 18 and Thursday, September 19 from 10:00 pm to 5:50 am., and Saturday September 21, from 12:00 am to 8:00 am. Eastbound C-470 ramps to northbound E-470 and northbound I-25. Detour: Take eastbound C-470 ramp to southbound I-25. Exit on Lincoln, turn left and continue back onto northbound I-25 to northbound E-470.
  • Tuesday, September 17, from 10 p.m. to 5:30 a.m. Eastbound C-470 ramp to southbound
    I-25. Detour: Take  eastbound C-470 ramp to northbound I-25. Exit at Dry Creek Rd., turn left and continue back onto southbound I-25.
  • 24/7 beginning Saturday, September 14  at 8:00 am., through Wednesday, September 18 at 5:30 am. Left lane closures on the westbound Quebec on-and off-ramps. These closures are necessary to tie-in new permanent concrete on the ramps to the existing concrete on Quebec St. Motorists will still be able to use one lane of the Quebec on-and off-ramps.
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