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FLAGSTAFF — The City of Flagstaff and its contractor, Ames Construction, will begin the next phase of the Lone Tree Overpass project on Monday, March 2. The project area is Butler Ave. between O’Leary St. and Lumber St. and Lone Tree Rd. between Butler Ave. and Sawmill Rd. The work entails roadway reconstruction, installation of water line, sanitary sewer, and storm drains, improvements to concrete curb and gutters, sidewalks, and driveways, and re-alignment to add bike lanes and multi-use travel paths. The work is expected to be completed in December 2026.
Work hours for this project are Monday through Friday, 6 a.m. to 5 p.m., though some weekend work may occur. From Monday, March 2 to Friday, Aug. 14, Lone Tree Rd. will be reduced to one lane traffic in both the north and south directions between Butler Ave. and Sawmill Rd. Eastbound and westbound lanes on Butler Ave. will also be reduced to one lane traffic. No left turns onto or off Lone Tree Rd from Butler Ave will be permitted. A modified traffic plan will be shared at a later date for the August through December period. Local traffic and driveway access will be maintained for businesses and residents throughout the construction period.
The Lone Tree Overpass project aims to improve mobility and safety with a new north-south roadway connection extending Lone Tree Rd. between Butler Ave. to the south and Route 66 to the north. The project is funded by 2018 voter approved Proposition 419 and Proposition 420. For more information, please visit https://lonetreeoverpass.org/.
For related questions, please contact Jesa’Lyn Waggoner with Ames Construction at (602) 540 – 5410 or Christine Cameron, City of Flagstaff Senior Project Manager, at (928) 213-2682.