Projects

Traffic Impacts

For the week of Jan. 24

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Watch for flaggers and trucks – Crews are beginning the pre-construction work for the County Line Road bridge reconstruction. Motorists and frequent users of the County Line Road bridge can expect increased construction truck traffic in the area. Watch for these trucks entering and exiting the work zone.
 
Additionally, motorists will begin to see flaggers on the County Line Road bridge. Please practice extra caution in the area and be extra diligent when traveling through the construction zone. Follow posted speeds and never drive distracted. 

Remember: All construction schedules described below are weather-dependent and could change.


Ramp Closures at County Line Road Thursday

The northbound off- and on-ramps at County Line Road will be closed overnight Thursday from 8 p.m. to 5 a.m. so crews can set barrier as part of a traffic shift. For access to County Line Road, continue north on I-25 and use the Greenland Road interchange (exit 167) to turn around. For access to northbound I-25, head south on I-25 and use the CO 105 interchange (exit 161) to turn around.

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Ramp Closures at County Line Road Sunday

If you are planning to use the County Line Road interchange with I-25 overnight Sunday, Jan. 24, from 8 p.m. to 5 a.m. watch for the below impacts and detours. 

  • Crews will first close the southbound I-25 off-ramp to County Line Road and County Line Road on-ramp to northbound I-25. View detour maps below. 
  • Once those ramps are restriped, crews will close the County Line Road on-ramp to southbound I-25 and the northbound I-25 off-ramp to County Line Road. View detour maps below. 

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Detour map for closure of southbound I-25 on-ramp from County Line Road.

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12-Hour Single Lane Closure of Southbound I-25 - POSTPONED DUE TO WEATHER

Overnight Tuesday, Jan. 26, from 8 p.m. to 8 a.m., crews will require a single lane closure of southbound I-25 between Spruce Mountain Road (exit 173) and Greenland Road (exit 167) as crews set bridge beams (girders) for a wildlife crossing in the area. One lane of southbound I-25 will remain open so stay the course of I-25.


Closures

* Remember: planned lane closures can be affected by weather. 

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Description Time Frame Work Detour

Overnight single lane closures northbound and southbound I-25
between Plum Creek Parkway and Monument

Sunday - Friday
Jan. 24 - Jan. 29
8 p.m. to 5 a.m.

Guardrail and pothole repairs, guardrail removal, grading, traffic shifts, striping operations, pavement work, paving operations, fiber testing, emergency pull-out sign placement and barrier work.

One lane open in each direction of I-25.
Stay the course!

Full closure of the southbound I-25 off-ramp to Upper Lake Gulch Road

Ongoing closure until further notice
(Began Oct. 25, 2019)

Bridge demo and rebuild.

 

To access northbound I-25 from Larkspur, motorists should use the Upper Lake Gulch Road on-ramp to northbound I-25.

To access Larkspur from southbound I-25, motorists should use the southbound I-25 off-ramp to Spruce Mountain Road.

Full closure of the Upper Lake Gulch on-ramp to northbound I-25

Ongoing closure 
(Began in November 2020)

Bridge demolition and 
reconstruction; work on mainline I-25

Access northbound I-25 from the new Spruce Mountain Road bridge

Shoulder closures along northbound and southbound I-25 throughout the 18-mile project corridor.  

Monday - Friday
Jan. 25 - Jan. 29
8:30 a.m. to 4 p.m.

Earthwork and erosion control

One lane open in each direction of I-25. 
Stay the course!

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Description Time Frame Work Detour
Full 1,100-foot closure of Monument Hill Frontage Road, east of mainline I-25

Ongoing full closure for seven months (Reopens March 2021)

Construct a wildlife underpass, replace drainage pipes, complete roadway construction and install a soundwall 

Use I-25 and exit at CO 105 or County Line Road.

View detour map.

Single lane closures and flagging operations
along East and West Frontage Roads 
Plum Creek Parkway and Sky View Lane (Tomah Road)

Monday - Friday
Jan. 25 - Jan. 29
8:30 a.m. to 4 p.m.

Installation of fiber optic lines,
frontage road repairs and install
guardrail
Watch for flaggers who will direct traffic.
Residential access will be maintained. 
Thank you for your patience!
Flaggers will be present at the County Line Road, Greenland Road and Upper Lake Gulch Road interchanges to I-25.

Monday - Saturday
Jan. 25 - Jan. 30
8:30 a.m. to 4 p.m.

Bridge work Watch for flaggers who will direct traffic.
Residential access will be maintained. 

Project Offices in Castle Rock

A temporary construction office for CDOT and its contractor partner, Kraemer North America, is located near the intersection of Crystal Valley Parkway and the I-25 east Frontage Road. Please watch for vehicles entering and exiting the site throughout the duration of construction. Upon project completion, the area will be returned to its previous state; the asphalt will be removed and the area will be re-graded and seeded.


Safety for drivers and workers is our top priority during construction.

 Get project text alerts:
Text I25GAP to 21000.

 Get project emails:

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