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Two road closures this summer around Riverdale Ridge High School

Summer road closure at 136th Ave. & Yosemite St. in Thornton

There will be multiple road closures this summer around Riverdale Ridge High and Quist Middle schools in Thornton. Summer road construction will close two streets, 136th Avenue and Yosemite Street, in Thornton starting next week.

Here are the details of the road closures with dates:

  • All lanes of 136th Avenue, from Yosemite Street to the western boundary line for the Quist Middle School construction, will be closed from May 25 through August 2. The closure is needed to do road construction to widen the road and to install sidewalks, curb and gutter on the south side of the road.


  • The intersection at 136th Avenue and Yosemite will be closed starting on May 25. A temporary road going east-west along 136th Avenue will be open, for local access only, from May 29 to August 2.


  • In the same vicinity, a second road closure will occur on Yosemite Street in front of Riverdale Ridge High School for two weeks, from May 29-June 10. The road will be closed between 136th Avenue and near the exit for the student parking lot to the south of the high school. Yosemite Street will be closed for rotomill work and road paving. The road will open to one-lane from June 11 through August 2.

Parents, students and community members needing to access Riverdale Ridge High School and Quist Middle School during the summer, should access the schools from the southern end of Yosemite Street from near Riverdale Road through August 2.