CDOT to Host Two Open Houses for Public to Learn About I-25 South Gap Project

Aug. 14, 2018 - Construction Begins in September

With the start of construction scheduled to begin this fall, the Colorado Department of Transportation (CDOT) is inviting the public to learn more about the I-25 South Gap project—including expected construction impacts—at two open houses this month:

El Paso County Town Hall

5-7 p.m.
Monday, Aug. 20
Monument Academy
1150 Village Ridge Point


  1. From I-25, use Exit 161 (Colorado Highway 105).
  2. Drive east on CO 105 for one mile.
  3. Monument Academy will be on the left after Integrity Bank.


  1. Turn left at Gold Canyon Road into the parking lot of The Church of Jesus Christ of Latter-day Saints.
  2. There will be limited parking at the school, so please use the church parking lot.
  3. Enter through the front of the school through the Gym doors.

Douglas County Town Hall

5-7 p.m.
Wednesday, Aug. 22
Douglas County Fairgrounds
Kirk Hall
500 Fairgrounds Road
Castle Rock


  1. From I-25, take the Plum Creek Parkway (Exit 181) east.
  2. After about one mile, turn left on Fairgrounds Road.

For ADA accommodations, please call the project hotline—720-745-5434—48 hours before the meeting you wish to attend.

Both opportunities are open-house style events; there will not be a formal presentation. Attendees can visit any time between 5 p.m. and 7 p.m. to talk one-on-one with project experts. There will be multiple display boards explaining the project and plenty of staff available to answer questions.

Sept. 6 Telephone Town Hall

For those who cannot attend either event in person, CDOT will also host a Telephone Town Hall from 6:15 to 7:15 p.m. Thursday, Sept. 6. The automated system will call some area stakeholders. Those who don't receive a call and want to participate can call 1-877-229-8493, and enter passcode 117409.

Project Info

The I-25 South Gap project encompasses an 18-mile stretch of I-25 from south of Castle Rock to Monument, called "The Gap." It is the only four-lane section of I-25 connecting Colorado's two largest cities: Denver and Colorado Springs. Over the years, population growth has driven an increase in congestion, crashes and delays in this corridor. Following more than a year of study, improvements will soon be underway.

This is the fastest delivery of a project of this size in CDOT history. CDOT's goal is to improve safety, mobility and travel reliability throughout the corridor by:

Adding one lane in each direction of I-25 between Monument and Castle Rock, expanding from two to three lanes in each direction.
The new lane will operate as an Express Lane, so motorists will always have the choice of taking the two general-purpose lanes for free or taking the Express Lane for a reliable trip in exchange for a variable toll.

Widening shoulders to allow room for enforcement zones, maintenance and detours around incidents.

Rehabilitating structures and pavement, including the replacement of four bridges.

Building five wildlife underpasses and expanding the existing one at Plum Creek.

Improving lighting, signage, fencing and other safety features.

Construction crews will be working around the clock and sometimes on weekends to deliver these improvements on time, on budget, and with as little impact as possible.

Travel Impacts

Roadwork will begin in early September on the northern portion of the project near Castle Rock. By summer 2019, most of the 18-mile corridor will be experiencing active construction.

For the most part, drivers can expect two lanes to remain open in both directions of I-25 during the day. At night, drivers can expect lane and/or ramp closures. Drivers can also expect slower speed limits, narrower lanes, increased volume and construction trucks entering and exiting the interstate throughout the corridor.

Stay Informed