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The Cone Zone

Below is information regarding lane closures and detours impacting the City of Thornton.

88th Avenue Lane Closures

From 2/19/2020 to 4/3/2020, single lane closures will be in place at all times of the day on 88th Avenue between Colorado Boulevard and Dahlia Street. Alternate routes are advised.

The lane closures are for repairs to the 88th Avenue bridge over the South Platte River.

128th Avenue Closure

128th Avenue from Valentia Street to Wabash Place will be closed from 3/21/2020 to 4/13/2020. 

The detour route for eastbound 128th Avenue is to go north on Quebec Street to 136th Avenue, east on 136th Avenue to Yosemite Street, then south on Yosemite Street to 128th Avenue.

The detour route for westbound 128th Avenue is to go north on Riverdale Road  to 136th Avenue, west on 136th Avenue to Quebec Street, then south on Quebec Street to 128th Avenue.

This closure is for the Brantner Gulch Drainage Improvements at 128th Avenue. 

I-25 Ramp Closure

On 3/30/2020 and 3/31/2020, the on-ramp from 120th Avenue to southbound I-25 will be closed at 9:30 PM and reopen at 5:30 AM the following morning. 

The detour route is to go west on 120th Avenue to Huron Street, south on Huron Street to 104th Avenue, then east on 104th Avenue to I-25.

The closures are part of the Colorado Department of Transportation's North I-25 Express Lanes Project. For more information please visit the project website


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