Traffic Impacts

For the week of Oct. 18

I-25 Closures and Detours - With winter 2020 on the horizon, it is important for crews to switch traffic to new pavement. Throughout the rest of October and into November, crews will occasionally close northbound or southbound I-25 for drainage installation, paving operations and traffic shifts. Motorists will funnel into one lane and detour around the closure via the off- and on-ramps at interchanges along the corridor.

This work is weather-dependent and subject to change. Stay tuned to this weekly update, the I-25 South Gap website or the I-25 South Gap Facebook page for more details on upcoming closures along the project.

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

Southbound I-25 Closure and Ramp Detour Friday and Saturday

Crews are planning two closures of southbound I-25 for drainage installation and paving operations. Motorists will detour via the off- and on-ramps at the respective interchanges below:

8 p.m. Friday, Oct. 16, to 8 a.m. Saturday, Oct. 17: Southbound I-25 closed at the Sky View Lane/Tomah Road interchange (exit 174). Motorists will funnel into one lane and detour around the closure using the off- and on-ramps at the Sky View Lane/Tomah Road interchange. View detour map.
8 p.m. Saturday, Oct. 17, to 8 a.m. Sunday, Oct. 18: Southbound I-25 closed at the Upper Lake Gulch Road interchange (exit 172). Crews will open the southbound I-25 off-ramp at Upper Lake Gulch Road temporarily during this closure as motorists funnel into one lane and detour using the off- and on-ramps at the Upper Lake Gulch Road interchange. During this closure, the southbound I-25 off-ramp to Spruce Mountain Road will be closed for drainage work. View detour map.

During these closures, drivers may see crews setting up cones and signs up to an hour prior to closure start time. There are no alternate routes, so drivers must stay the course on I-25 and plan for delays up to 20 minutes.

Nightly 12-Hour Closures of Southbound I-25 this Week

Crews are planning closures of northbound and southbound I-25 for paving operations and drainage installation. Motorists will detour via the off- and on-ramps at the following interchanges:

8 p.m. to 8 a.m., Sunday, Oct.18 through Thursday, Oct. 22: Southbound I-25 closed at the Sky View Lane/Tomah Road interchange (exit 174). Motorists will funnel into one lane and detour around the closure using the off- and on-ramps at the Sky View Lane/Tomah Road interchange. View detour map.
8 p.m. Friday, Oct. 23, to 8 a.m. Saturday, Oct. 24: Southbound I-25 closed between Spruce Mountain Road (exit 173) and Upper Lake Gulch Road (exit 172). Motorists will funnel into one lane and exit at Spruce Mountain Road. Then, they will re-enter southbound I-25 using the Upper Lake Gulch Road on-ramp. View detour map.

12-Hour Closures of Northbound I-25 on Oct. 23 and 24

If you plan to travel northbound I-25 near Larkspur, plan ahead for these impacts related to drainage work:

8 p.m. Friday, Oct. 23, to 8 a.m. Saturday, Oct. 24: Right lane closure of northbound I-25. Full closure of the northbound I-25 off-ramp to Sky View Lane/Tomah Road. For access to Sky View Lane/Tomah Road, continue north and exit at Plum Creek Parkway (exit 181). View detour map.
8 p.m. Saturday, Oct. 24, to 8 a.m. Sunday, Oct. 25: Northbound I-25 closed at the Sky View Lane/Tomah Road interchange. Motorists will funnel into one lane and detour around the closure using the off- and on-ramps at the Sky View Lane/Tomah Road interchange. View detour map.

Closures

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

Description	Time Frame	Work	Detour
Overnight single lane closures northbound and southbound I-25 between Plum Creek Parkway and Monument	Sunday-Friday Oct. 18-23 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!
Southbound I-25 closure with ramp detour at Sky View Lane/Tomah Road	Friday Oct. 16 8 p.m. to 8 a.m. Sunday-Thursday Oct. 18-22 8 p.m. to 8 a.m.	Drainage installation	Stay on I-25. Use the off- and on-ramp at the Sky View Lane/Tomah Road interchange to detour around this closure.
Southbound I-25 closure with ramp detour at Upper Lake Gulch Road	Saturday Oct. 17 8 p.m. to 8 a.m.	Drainage installation	Stay on I-25. Use the off- and on-ramp at the Upper Lake Gulch Road interchange to detour around this closure. The southbound I-25 off-ramp to Upper Lake Gulch Road will temporarily open to accommodate this detour.
Closure of the southbound I-25 off-ramp to Spruce Mountain Road	Saturday Oct. 17 8 p.m. to 8 a.m.	Drainage installation	Use the southbound I-25 off-ramp to Upper Lake Gulch Road for access to Larkspur.
Northbound I-25 off-ramp and single lane closure at Sky View Lane/Tomah Road	Friday Oct. 23 8 p.m. to 8 a.m.	Paving operations for traffic shift	Head north and use the Plum Creek Parkway interchange to access Sky View Lane/Tomah Road.
Northbound I-25 closure with ramp detour at Sky View Lane/Tomah Road	Saturday Oct. 24 8 p.m. to 8 a.m.	Paving operations for traffic shift	Stay on I-25. Use the off- and on-ramp at the Sky View Lane/Tomah Road interchange to detour around this closure.
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 Spruce Mountain Road on-ramp to northbound I-25	Ongoing closure through the fall (Began in October 2019)	Bridge demolition and reconstruction	Access northbound I-25 from Upper Lake Gulch Road
Shoulder closures along northbound and southbound I-25 throughout the 18-mile project corridor.	Monday-Friday Oct. 19-23 8:30 a.m. to 4 p.m.	Earthwork and erosion control	One lane open in each direction of I-25. Stay the course!

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 (Began Aug. 24)	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)	Daytime Hours Monday-Friday Oct. 19-23 7 a.m. to 5 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 Greenland Road and Upper Lake Gulch Road access to I-25.	Monday-Saturday Oct. 19-24 7 a.m. to 5 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.