Projects

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.

CDOT will conduct a six-day full closure of the Wadsworth on-ramp to eastbound C-470, to eliminate more than 30 nights of full closure and two additional traffic shifts. This closure will begin on Thursday, July 18 at 9:00 p.m. and will continue through Wednesday, July 24 at 5:30 a.m.

This closure is necessary to remove existing asphalt, perform earthwork activities and permanent pave the on-ramp. When opened, the ramp will be in it's final configuration. By conducting a full closure of the on-ramp, two traffic switches and the use of temporary asphalt are eliminated. This will decrease confusion for the travelling public while increasing safety for motorists and construction crews.

Motorists will have two detour options available to them, by way of Kipling or Santa Fe as shown below.

Kipling Detour: Traffic will take the Wadsworth Blvd westbound on-ramp, exit Kipling Pkwy, turn left and continue back onto the eastbound C-470 on-ramp. Continue on eastbound C-470.

Santa Fe Detour: Traffic will take Wadsworth Blvd. north to Ken Caryl Ave. and turn right. Continue on Ken Caryl Ave. until it  turns into Mineral Ave. Take Mineral Ave. to Santa Fe Dr. and turn right. Continue south on Santa Fe and take the eastbound C-470 on-ramp.

CDOT will conduct an extended full closure of the westbound C-470 off- and on-ramp at Platte Canyon Rd. This closure will start on Wednesday, July 24 at 8 p.m. and continue through Thursday, August 15 at 5:30 a.m. (21-day duration)

This closure is necessary to remove existing asphalt, complete earthwork activities, remove and replace existing drainage and complete permanent paving as part of the C-470 Express Lanes project.

By conducting an extended full closure of the off- and on-ramps, the project will eliminate over 100 nightly ramp closure and the need for additional traffic switches and the use of additional temporary asphalt. The benefits of this closure will decrease confusion for the traveling public while increasing safety for motorists and construction crews. When completed, the off- and on-ramps will open to their final configuration.

Westbound Platte Canyon off-ramp detour: Continue on westbound C-470 to the Wadsworth Blvd. exit. Turn right onto northbound Wadsworth Blvd. then turn right onto Chatfield Ave. Continue until Chatfield Ave. turns into Platte Canyon Rd. See map below.

Northbound Platte Canyon Rd. to Westbound C-470 On-Ramp from Detour: Continue north on Platte Canyon Rd. To Ken Caryl Ave. Turn left on Ken Caryl Ave. to Wadsworth Blvd., and turn left. Continue south on Wadsworth Blvd. to the westbound C-470 om-ramp. See map below.

Southbound Platte Canyon Rd. to Westbound C-470 On-Ramp from Detour: Continue south on Platte Canyon Rd. until the road becomes Chatfield Ave. Continue west on Chatfield Ave. to Wadsworth Blvd., turn left on Wadsworth Blvd. to the westbound C-470 on-ramp. See map below.

  • Sunday, July 14 from 10 p.m. to 5:30 a.m. and Saturday, July 20 from 12 a.m. to 8 a.m. eastbound C-470 to northbound I-25 and E-470 will be closed for drainage installation, grading operations, paving and to set temporary barrier.
  • Sunday, July 14 through Wednesday, July 16 from 10 p.m. to 5:30 a.m. the northbound/southbound I-25 ramps and southbound E-470 ramp to westbound C-470 will be closed to perform grading operations, temporary paving and to set barrier.
  • Monday, July 15 through Thursday, July 18 from 10 p.m. to 5:30 a.m. eastbound C-470 will be closed from University to Quebec for overhead sign removal. Detour: exit University eastbound off-ramp. Turn left onto northbound University, proceed to County Line Rd. and turn right. Continue on County Line Rd. until Quebec St. Turn right onto southbound Quebec St., then turn left onto eastbound C-470 on-ramp.
  • Wednesday, July 17 from 11 p.m. to 4 a.m. the eastbound C-470 ramps to northbound E-470 will be closed to perform inlet repair and roadway maintenance. Detour: Take eastbound C-470 ramp to northbound I-25. Exit on Dry Creek Rd., turn left and continue back onto southbound I-25. Proceed to northbound E-470.
  • Wednesday, July 17 and Thursday, July 18 from 10 p.m. to 5:30 a.m. and Saturday, July 20 and Sunday, July 21 from 12 a.m. to 6 a.m. southbound/northbound I-25 and southbound E-470 to westbound C-470 until University Blvd. will be closed to perform asphalt maintenance activities in preparation for a future traffic switch. Detours: NB I-25 to WB C-470 - Continue on northbound I-25 to County Line Rd. Exit County Line Rd and turn left. Continue west on County Line Rd. until University Blvd. Turn left onto southbound University Blvd., then turn right onto the westbound C-470 on-ramp. SB I-25 to WB C-470 - Continue southbound on I-25 to Lincoln Ave. Exit at Lincoln Ave. and turn right. Continue west on Lincoln to University Blvd. Continue north on University, then turn left ton the westbound C-470 on-ramp. SB E-470 to WB C-470 - Take the southbound E-470 ramp to southbound I-25. Continue southbound on I-25 to Lincoln Ave. Exit Lincoln Ave. and turn right. Continue west on Lincoln to University Blvd. Continue north on University, then turn left onto the westbound C-470 on-ramp.
  • Saturday, July 20 and Sunday, July 21 from 6 a.m. to 8 a.m. as well as Sunday, July 21 through Wednesday, July 24 from 10 p.m. to 5:30 a.m.  southbound/northbound I-25 and southbound E-470 ramps to westbound C-470 until Quebec St. will be closed to perform asphalt maintenance activities in preparation for a future traffic switch. Detours: NB I-25 to WB C-470 - Take northbound I-25 and exit onto County Line Rd. west. Continue on County Line Rd. to Quebec St. and turn left. Take Quebec St. to the C-470 westbound on-ramp. SB I-25 to WB C-470 - Take southbound I-25 and exit onto Lincoln Ave. west. Continue on Lincoln Ave. to Quebec St. and turn right. Take Quebec St. to the westbound C-470 on-ramp. 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. to Quebec St. and turn right. Take Quebec St. to the westbound C-470 on-ramp.
  • Saturday, July 20 from 11 p.m. to 6 a.m. and Sunday, July 21 through Tuesday, July 23 from 9:30 a.m.to 5:30 a.m. eastbound C-470 from Wadsworth to Santa Fe will be closed to perform ramp construction and tie-in the existing roadway to the newly constructed ramp. Detour: Exit Wadsworth Blvd. eastbound off-ramp. Turn left onto northbound Wadsworth Blvd., proceed north to Ken Caryl Ave. and turn right. Continue to Ken Caryl Ave. until the road becomes Mineral Ave. Continue on Mineral Ave. east to Santa Fe Dr. Turn right onto southbound Santa Fe, then continue to the eastbound C-470 on-ramp.
  • Sunday, July 21 from 10 p.m. to 5:30 a.m. the eastbound C-470 ramp to northbound I-25 will be closed to install permanent drainage pipe, perform grading operations and for paving activities. To Detour: Take eastbound C-470 to southbound I-25. Exit on Lincoln Ave., turn left and continue back onto northbound I-25. Take northbound I-25 to northbound E-470.
  • Monday, July 22 through Thursday, July 25 from 10 p.m. to 5:30 a.m. and Saturday, July 27 from 12 a.m. to 8 a.m. eastbound C-470 to southbound I-25 will be closed for drainage installation, grading and paving activities. Detour: take eastbound C-470 to northbound I-25. Exit on Dry Creek Rd., turn left and continue back onto southbound I-25.
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