A “mill & overlay” is a street maintenance technique that requires the removal of the top layer (2") of a street by the grinding action of a large milling machine. After the top layer is removed, a new layer of bituminous pavement is put in its place.
The “milling” portion of the project typically takes one-to-two days. After the milling is completed, the “overlay” is placed in one-to-two days depending on the width of the roadway and traffic conditions. Before the new pavement is placed, the surface of the newly milled pavement is covered with a liquid asphalt tack coat to bond the old and new pavements.
Afterwards, a new asphalt overlay is placed at a depth of 1 ½” using a machine called a paver. Hot asphalt (350 degrees F) is brought in by trucks from the city’s Asphalt Plant. Each truck carries approximately 10 tons per load and overlay crews can quickly lay 400 to 600 tons of asphalt per day.
The city typically mills and overlays three-to-five miles of city and county arterial streets (primary roads) in Saint Paul each year, depending on funding availability. The projects are selected based on pavement condition and traffic volume. Parking is restricted in the immediate area of the work; restriction signs are posted 24 hours prior to work starting.
2020 Mill and Overlay Projects
Arlington Avenue: East Shore Drive to White Bear Avenue
Ayd Mill Road
Territorial Avenue & Cromwell Avenue: University Avenue to Territorial and Berry Street to Raymond Avenue
Downtown Saint Paul: See map for specific streets
Eustis Street: 280 to City Limits
Fairview Avenue: University Avenue to Minnehaha Avenue (Municipal State Aid project)
Mississippi River Boulevard: Dayton Avenue to Randolph Avenue, includes Marshall ramp
Suburban Avenue: Kennard Street to Ruth Street
Western Avenue: Selby Avenue to Summit Avenue (Municipal State Aid project)
2019 Mill and Overlay Projects
Cleveland Avenue: Yorkshire Avenue to Mississippi River Boulevard
Pascal Street: University Avenue to St. Anthony Avenue (completed April 2019)
Prior Avenue: I-94 to Summit Avenue
St. Clair Avenue: Fairview Avenue to Snelling Avenue
Lowertown: All streets east of Jackson Street to Broadway Street except 4th and 7th Streets and 8th Street from Wacouta Street to Wall Street
2018 Mill and Overlay Projects
Arlington Avenue: Rice Street to Jackson Street
Forest Street: Maryland Avenue to 7th Street
Franklin Avenue: Highway 280 to Pelham Boulevard, including Cromwell Avenue from Franklin Avenue to University Avenue
Prior Avenue: University Avenue to Minnehaha Avenue
Rice Street: Maryland Avenue to Ivy Avenue (October 8 and 9 weather permitting)
Stryker Avenue: Baker Street to Annapolis Street
Third Street: Ruth Street to McKnight Road
Victoria Street: Summit Avenue to St. Clair Avenue
Western Avenue: Larch Street to Front Street
Wilson Avenue: Ruth Street to McKnight Road
Street Maintenance Service Program
Learn more about the City of Saint Paul’s Street Maintenance Service Program and property owner fees for lighting, street sweeping, seal coating and/or mill and overlay projects.