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.