News & Press Releases

Tuesday, July 09, 2013
Chipseal season begins Wednesday; to run through mid-September

Garden City – It’s the sign of summer – and starting Wednesday, Ada County Highway District (ACHD) crews will begin work to chipseal 125 miles of roadway in Ada County.  This year, approximately 45 miles of residential streets and 80 miles of larger, more heavily traveled roads will receive the maintenance treatment.

The multi-step chipseal process involves a liquid asphalt mixture, small rocks and fog seal application to protect the county’s $3 billion in roadway infrastructure.

The 2013 chipseal season includes areas roughly bound by McDermott Road to the west and Five Mile Road to the east; Ustick Road to the north, and Lake Hazel Road to the south. Not all streets within the zone will receive a chipseal. Streets planned to receive a chipseal need the maintenance treatment to preserve the road’s surface. To view a map of the specific streets that will receive a chipseal this summer, click here.

Crews will begin at the northern boundaries of this year’s zone and will work south, wrapping up the season in mid-September. On Wednesday, one crew will begin on residential streets near Five Mile Road and Fairview Avenue, while another crew will begin working in the Banbury subdivision just west of Eagle Road.

Chipseal Impacts
Chipseal crews typically work weekdays between 7 a.m. and 5 p.m. Crews may also work Sundays or earlier in the morning when traffic is lighter on busy roadways and intersections.

Once a chipseal is applied to the road, vehicles are immediately allowed to drive slowly over the new surface. However, caution should be used. At signalized intersections, flaggers may be used in place of traffic lights to direct motorists.

Traffic delays may be longer when crews are working in major intersections. Motorists should expect delays between five and 15 minutes long during certain steps in the chipseal process. Additional impacts include lane restrictions, and large equipment and crews working along the roadways, often close to traffic.

About Chipsealing
Chipsealing helps combat the deterioration of roads caused by sun and weather and involves a multi-step process that helps seal the road surface, providing an armor coat for skid and weather resistance.

To apply the chipseal, an asphalt truck sprays the road with a liquid asphalt mixture. A spreader truck then applies rock chips and is followed by a rubber tire roller which sets the chips into the fresh oil. ACHD follows each chipseal with a fogseal that helps set the chips and controls fly-rock and dust. Motorists should drive slowly in newly chipsealed areas to prevent flying rock.  

For chipseal zone maps and more information, including weekly updates of where crews will be working, visit


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