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120th Ave. Improvements Project Information

For issues or concerns with the construction, please contact American West Construction at 719.426.3270 or 120thaveproject@gmail.com.

Project Overview
East 120th Avenue will be widened from two lanes to three in each direction from Sylvia Drive, just east of Washington Street, to the N Line overpass, eliminating a bottleneck over that stretch. This is one of the busiest thoroughfares in Adams County; expansion is a necessity and long overdue.  

In addition, walking paths will be installed on both sides of the street and all traffic signals in the corridor will be upgraded.

Construction began Jan. 9 and is scheduled to last 12 to 18 months. Traffic will be narrowed down to one lane in each direction at times, depending on which area construction is taking place. Motorists are advised to use alternate routes when possible.    

Work will primarily take place from 7 a.m. to 6 p.m. on weekdays. However, special permission to work every day from 6 a.m. to 10 p.m. will be granted early on in the project and perhaps during other high-impact times. The extended hours are an effort to reduce the length of time the community will be affected by the most disruptive closures and construction.   

The city thanks you in advance for your patience, we understand a large road project is inconvenient. When finished, this stretch of East 120th Avenue will have 50% more capacity – reducing congestion and improving safety for everyone.

120th_avenue_construction_map_web

Updates

  • Jan. 18 – The contractor removed the concrete median, installed the temporary lanes and moved traffic. The contractor is now working on the storm drain system on both sides of the road.


Cost

Inflation has affected every aspect of the economy, and construction is no different. The initial project cost estimate in January 2021 was $13.5 million; it is now $17.8 million. Federal funds are covering about $9.5 million, with the City of Thornton and Karl’s Farm developers contributing another $2.8 million. That leaves Northglenn spending $5.5 million, less than a third of the total project cost. 


Information from January 2021

The city plans to widen 120th Avenue to three lanes in both directions between Washington Street and York Street, plus install 8- to 10-foot pedestrian trails on both sides of the road. The project is tentatively scheduled to begin in April 2022.

There was a public meeting to hear about the project and ask questions on Jan. 20 at the recreation center. The meeting was recorded for others to view afterwards: 


FAQ
What is the purpose of the project?
To widen 120th Avenue to three lanes in both directions between Washington  Street and York Street, as well as construct improved pedestrian trails on both sides of the road.

Why is the city investing in this project?
It will eliminate the bottleneck and congestion that occurs during high-volume traffic hours and improve road safety. Adding the third lane will increase capacity by 50%, is anticipated to reduce accident rates, and improve air quality (less idling ). A new traffic signal at Race Street will accommodate future development in the Karl’s Farm area.

How is the project funded?
The city received a federal grant in the amount of $9.48M, plus a private developer (Karl's Farm) provided $1.8M towards the local $3.98M of matching funds required.  In total, this is a $13.46M project (the city’s contribution is $2.18M, with $11.28M leveraged from other sources).

When will construction start and how long will it take?
The project timeline (subject to change) is to award the contract in April of 2022; the start date is not determined but hopes are it will be soon after the contractor is secured. It is a 12 to 14-month construction schedule.

Question from the info meeting -- was a noise survey conducted?
Yes, click here to see the report