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The Cone Zone

Below is information regarding major lane closures and detours impacting the City of Thornton. For more information about capital improvement projects, click on the infrastructure link on the right side of this page. 

156th Avenue Road Closure


From 5/28/2024 to 7/29/2024, 156th Avenue will be closed between York Street and Columbine Court.

The detour route for eastbound traffic is to go north on York Street to CO-7, east on CO-7 to Colorado Boulevard, and then south on Colorado Boulevard to 156th Avenue. The detour route for westbound traffic is to go north on Colorado Boulevard to CO-7, and then west on CO-7 to York Street.

The closure is for work on the Big Dry Creek parallel sewer.


136th Avenue Road Closure


From 5/28/2024 to 8/05/2024, 136th Avenue will be closed between Quebec Street and Syracuse Street.

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

The closure is for work on sewer, storm, and water lines for the Quebec Highlands commercial development.


152nd Avenue Road Closures


From 6/1/2024 to 6/17/2024, 152nd Avenue will be closed between York Street and Gaylord Street.

The detour route for eastbound traffic is to go south on Gaylord Street to 151st Avenue, then east to York Street.

The detour route for westbound traffic is to go south on York Street to 151st Avenue, west to Gaylord Street, then north to 152nd Avenue.


From 6/1/2024 to 8/5/2024, 152nd Avenue will be closed between York Street and Fillmore Street.

The detour route for eastbound traffic is to go south on York Street to 148th Avenue, east on 148th Avenue to 150th Drive, then west on 150th Drive, which will turn north towards 152nd Avenue.

The detour route for westbound traffic is to go south on Fillmore Street to the intersection of Fillmore Street and 150th Drive, south on Fillmore Street to York Street, then north on York Street to 152nd Avenue.


The closures are for sanitary sewer and utility installation.








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