Leetsdale-Monroe-Elati 230-kV Underground Transmission Line Replacement
Project Overview
Xcel Energy is replacing the six-mile-long 230-kilovolt (kV) Leetsdale-Monroe-Elati underground transmission line in central and southeast Denver. This and adjacent areas have experienced tremendous growth in recent years, which has increased the demand for additional, reliable electricity. To address the need, we will install a larger, more modern electric cable system.
The existing underground transmission line must be relocated to be replaced due to its location predominantly beneath Leetsdale Drive and Speer Boulevard, both heavily used thoroughfares. Concerns for public and occupational safety in heavy traffic areas during construction, constraints associated with keeping the line energized during construction and the underground space allowance needed to replace the line prohibit a rebuild in place. The proposed route location avoids collector and aerial roadways, which supports the safe construction, operations and maintenance of the underground line.
Resources
JOIN EMAIL LIST - Receive Weekly Project Construction Notices (Opens in a new window) Project Information Sheet (Opens in a new window) July 2026 Virtual Open House Video Presentation (Coming Soon) (Opens in a new window) July 2026 Virtual Open House Questions & Answers (Coming Soon) (Opens in a new window) November 2025 Open House Display Boards (Opens in a new window) November 2025 Virtual Open House Video Presentation (Opens in a new window) November 2025 Virtual Open House Questions & Answers (Opens in a new window) Understanding Electric & Magnetic Fields (Opens in a new window) Comment Form (Opens in a new window)Phase 1: Leetsdale to Monroe
(November 2025 – Spring 2027)

*Map components are not to scale and are for illustration purposes only.
Phase 1 Temporary Road Closures*
Schedule updated: 08/21/2026 @ 1 p.m.
East Ellsworth Avenue
- August 3– August 28: between N Colorado Blvd and Ash Street (E. Ellsworth Avenue/S Albion Street intersection closed)
- April 28 – Augut 28: between S. Jackson to S. Colorado Boulevard (S. Harrison intersection closed)
- August 19 – September 2 : between S. Glencoe Street and S. Fairfax Street (S. Forest Street intersection closed)
*The schedule may be adjusted due to unexpected factors, including weather conditions, the availability of materials or resources, and discovery of underground obstacles.
Phase 2: Monroe to Elati
(August 2026 – Spring 2028)
*Map components are not to scale and are for illustration purposes only.
Phase 2 Temporary Road Closures*
Schedule updated: 08/21/2026 @ 1 p.m.
E 4th Avenue
- August 6– August 27: between St Paul Street and Adams Street (Steele Street intersection closed
- August 19 – September 3: between Steele St to Milwaukee St (to include St. Paul intersection)
*The schedule may be adjusted due to unexpected factors, including weather conditions, the availability of materials or resources, and discovery of underground obstacles.
Construction Activities
Here’s what you can expect.
Pre-construction work for Phase 1 and Phase 2 have begun. You may notice:
- Onsite field assessments.
- Marking of utility lines, survey holes, equipment and work areas.
- Soil sampling in roadways.
- Pruning, trimming and/or vegetation removal.
Construction is anticipated to begin in early November 2025 (Phase 1) and August 2026 (Phase 2). You may notice:
- Street and sidewalk closures, detours and signs.
- Increased travel time for commuters.
- Traffic control.
- Temporary changes to access, street and street-parking closures.
- Erosion and sediment control installation around work zones.
- Work zone fencing, equipment and material staging in and along streets.
- Construction operations, dust and noise.
During construction, we’ll install the new electric transmission lines and precast vaults using the open trench method, which involves cutting and removing street pavement to excavate a trench to place the electrical equipment within it.
Construction crews will work Monday through Friday, 7 a.m. and 7 p.m., and Saturday’s between 8 a.m. and 5 p.m. In certain situations, crews may be required to work evenings, nights, or Sundays.
We will restore work areas to conditions required by permits as weather allows. Work areas may be left temporarily restored after construction until we can complete final restoration.
Safety Around Construction Areas
We are committed to maintaining a safe working environment in your community. For your safety and the safety of our crews, remember these tips:
- Watch for construction crews and equipment.
- Do not enter construction areas.
- Obey signs and directions from crews.
- Follow posted vehicle and pedestrian detours.
- Reduce speeds while traveling.
- Observe parking restrictions.
- Remain flexible as work progresses and work areas change.
Public Outreach
We’re committed to transparency and collaboration, and we’ll continue engaging with the public throughout the life of this project. Open communication builds trust, fosters understanding, and helps ensure the project reflects community needs.
This webpage offers multiple ways for you to get involved, share your thoughts, ask questions, and voice concerns. Your input matters, and we’re committed to listening and incorporating feedback wherever feasible.
For those directly affected by construction, check back weekly for the latest construction schedule and temporary street closures.
* Use the interactive map above or the street closures listed below to understand construction timing in your area.*
Summer 2026 virtual open house meeting. Xcel Energy hosted a virtual open house on July 29, 2026 to inform residents and businesses about Phase 2 updates. The video presentation, recording, and Q&A will be coming soon. Thank you to everyone who attended!
Fall 2025 neighborhood open house meetings. Xcel Energy hosted a series of neighborhood open house meetings in early November 2025—two in person and one virtual—to inform residents and businesses about the need for the project, the upcoming work and what to expect during construction. No formal presentation was given at the in-person events and the materials used are located under the Resources heading.
Project Timeline
- Project Planning: 2023 - 2025
- Permitting: 2025 - 2026
- Public Outreach: 2025 - 2028
- Pre-construction: 2025 - 2026
- Construction:
- Phase 1: 2025 - 2027
- Phase 2: 2026 - 2028
- In Service: 2028
Contact Us
To submit your questions or comments:
- Mail the completed form or a letter to:
Xcel Energy Leetsdale-Monroe-Elati Transmission Line Replacement
C/O WSP
3900 S Wadsworth Blvd. Suite 700
Lakewood, CO 80235
- Email the completed form or a letter to leetsdaletoelati@xcelenergytransmission.com
- Call 1-303-716-8990 to submit verbal comments
- Populate the below electronic Contact Form and select Submit