Projects

Traffic Impacts

For the week of April 11

General Overview

It’s going to be a busy week on the I-25 South Gap corridor. Please take a minute to read this email for details on upcoming impacts that could lead to delays up to 20 minutes. Always check cotrip.org for current, estimated travel times prior to driving the corridor. Remember: All construction schedules described below are weather-dependent and could change.

16-Hour Single Lane and Ramp Closures at County Line Road this Weekend

Watch for two separate 16-hour impacts on southbound I-25 near Monument Friday through Sunday (April 9-11) for drainage installation. Delays up to 20 minutes should be expected. Construction-related activities may begin up to 30 minutes prior to closure start as crews mobilize equipment and set up traffic control.

  • 6 p.m. Friday, April 9, to 10 a.m. Saturday, April 10 – Closure of the County Line Road on-ramp to southbound I-25 (exit 163). For access to southbound I-25 from County Line Road, head north on I-25, exit at the Greenland Road interchange (exit 167) and use the Greenland Road on-ramp to southbound I-25 (see detour map).
  • 7 p.m. Saturday, April 10, to 11 a.m. Sunday, April 11 – Right lane closure of southbound I-25 near County Line Road and a closure of the southbound I-25 off-ramp to County Line Road. For access to County Line Road, continue south on I-25, exit and turn around at the CO 105 interchange (exit 161) and use the northbound I-25 off-ramp to County Line Road (see detour map).

Watch for Closures of I-25 near Monument for Bridge Work

During the week of April 11, motorists should watch for a series of overnight closures of I-25 near Monument as crews build the new County Line Road bridge over I-25. The current schedule is below:

  • 8 p.m. Sunday, April 11, to 5 a.m. Monday, April 12 – Southbound I-25 closed beneath the County Line Road bridge. Full closure of the County Line Road bridge. Full closure of the northbound I-25 off-ramp to County Line Road bridge. From 7 p.m. to 5 a.m., watch for a single lane closure on northbound I-25 at County Line Road as crews mobilize equipment. (See southbound I-25 closure detour map)
  • 8 p.m. Monday, April 12, to 5 a.m. Tuesday, April 13 – Northbound I-25 closed beneath the County Line Road bridge. Full closure of the County Line Road bridge. Full closure of the southbound I-25 ramps at County Line Road.  (See northbound I-25 closure detour map)
  • CANCELED DUE TO WEATHER - 8 p.m. Thursday, April 15, to 5 a.m. Friday, April 16 – Northbound I-25 closed beneath the County Line Road bridge. Full closure of the County Line Road bridge. Full closure of the southbound I-25 ramps at County Line Road. (See northbound I-25 closure detour map)
  • CANCELED DUE TO WEATHER - 8 p.m. Friday, April 16, to 5 a.m. Saturday, April 17 – Southbound I-25 closed beneath the County Line Road bridge. Full closure of the County Line Road bridge. Full closure of the northbound I-25 off-ramp to County Line Road bridge. (See southbound I-25 closure detour map)

Delays up to 20 minutes should be expected and impacts may begin as early as 6:30 p.m. to get equipment in place and set up closures. This work is weather-dependent and subject to change.

County Line Road On-Ramp to Northbound I-25 Closed

Overnight Saturday, April 10, from 8 p.m. to 5 a.m., crews will close the northbound I-25 on-ramp to County Line Road (exit 163) to complete a traffic shift. For access to northbound I-25, continue south on I-25, exit using the CO 105 interchange (exit 161), and use the CO 105 on-ramp to northbound I-25.

NB On-ramp Closure.jpg


Closures

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

Closures Banner


Description Time Frame Work Detour

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

Sunday - Friday
April 11 - 16
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
April 12 - 16
8:30 a.m. to 4 p.m.

Earthwork and erosion control

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

Frontage Road Banner

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 May 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
April 12 - 16
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
April 12 - 17
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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