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 Mary Carter Greenway Trail at the South Platte River is now open. Flaggers may be positioned in the area to guide trail users safely through as construction continues on the new westbound bridge.
  • Noise wall, drainage, wall and grading work 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.

Lane Closures

What:   Northbound and southbound Mary Carter Greenway Trail is fully closed at the C-470 underpass due to continual flooding of the South Platte River.
When: This emergency closure will be in place until water levels allow for safe passage on the trail
Detour: Trail users intending to continue through the C-470 underpass must detour beginning at Mineral Ave., all others will be able to use the Mary Carter Greenway Trail from Mineral Ave. to just before the C-470 underpass. 
  • 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 Mary Carter Greenway Trail. (Approx. 3.2 miles)
  • 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 Avenue. Take Mineral Ave. across Santa Fe Drive, then get on the Railroad Spur Trail back onto Mary Carter Greenway Trail. (Approx. 3 miles)
  • Monday, June 24 through Thursday, June 27 from 10 p.m. to 5:30 a.m. and Friday, June 28 and Saturday, June 29 from 11 p.m. to 6 a.m. eastbound C-470 from Santa Fe to Wadsworth will be closed to install permanent drainage. Detour: Exit Wadsworth Blvd. eastbound off-ramp. Turn left onto northbound Wadsworth Blvd., proceed north to Ken Caryl Ave. and turn right. Continue on Ken Caryl Ave.  until the road becomes Mineral Ave. Take Mineral Ave east until Santa Fe Dr. Turn right onto southbound Santa Fe, then continue south to the eastbound C-470 on-ramp fly-over.
  • Sunday, June 23 through Thursday, June 27 from 10 p.m. to 5:30 a.m. southbound I-25, northbound I-25 and southbound E-470 ramps to westbound C-470 will be closed to perform grading operations, paving and to switch traffic onto new permanent pavement. Detours: SB E-470 to WB C-470 - Take southbound E-470 to southbound I-25 and exit onto Lincoln Ave. west. Continue on Lincoln Ave. west to Yosemite St. and turn right. Take Yosemite St. north to the westbound C-470 on-ramp. SB I-25 to WB C-470 - Take southbound I-25 and exit onto Lincoln Ave. west. Continue on Lincoln Ave. west to Yosemite St. and turn right. Take Yosemite St. north to the westbound C-470 on-ramp. NB I-25 to WB C-470 - Take northbound I-25 and exit onto County Line Rd. west. Continue on County Line Rd. west to Yosemite St. and turn left. Take Yosemite St. south to the westbound C-470 on-ramp.
  • Wednesday, June 26 from 10 p.m. to 5:30 a.m. westbound C-470 from University to Broadway will be closed to install overhead sign structures. To Detour: Exit University Blvd. westbound off-ramp. Turn right onto northbound University Blvd., proceed north to County Line Rd. and turn left. Continue on County Line Rd. for one and a half miles to Broadway. Turn left onto southbound Broadway, then continue to the westbound C-470 om-ramp.
  • Monday, June 24 from 10 p.m. to 5:30 a.m. eastbound C-470 at Broadway will be closed for overhead sign installation. In addition, Thursday, June 27 and Friday, June 28 from 10 p.m. to 5:30 a.m. westbound C-470 will be closed at Broadway. There is no detour for these closures. Motorists will exit the Broadway off-ramps and continue through the traffic signals to the Broadway on-ramps.
  • Saturday, June 29 from 12 a.m. to 8 a.m. the southbound I-25 ramp to northbound E-470 and westbound C-470 will be closed to shift traffic onto permanent concrete pavement. Detour: Take southbound I-25 to Lincoln Ave. Take Lincoln Ave. eastbound and continue back onto northbound I-25 to westbound C-470 and northbound E-470.
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