News & Press Releases

Tuesday, June 09, 2015
Chipseal season begins at the Ada County Highway District

Ada County – Chipseal season officially begins in Ada County on June 15 this year, though ACHD crews could be out as soon as Wednesday (June 10). Zone 4, the scheduled chipseal area for this year, includes roads as far west as Orchard Street; as far south as Eisenman Road; as far north as Chinden Boulevard and Parkcenter Boulevard; and as far east as Surprise Way and Grand Forest Drive. 

Residents will receive green notices 5-10 days before the actual work begins. This notice will inform them of the intended time frame for work to begin (though all work is weather dependent). 24-48 hours before chipsealing will begin, crews will place "No Parking" signs along the sidewalks where on-street parking will be prohibited during the chipseal procedure. Vehicles not adhering to the request to not park on the street will be moved to a nearby street not affected by construction.

Motorists should take care when driving through a chipseal zone. It is very important to respect and adhere to posted speed limits and other instructions to help prevent oil and chips from damaging your car.

This year, the Ada County Highway District will chipseal and fogseal more than 500 miles of roadway. Chipsealing helps extend the life of the road by helping to seal and protect it from weather and wear. 
The Highway District has divided the county into six chipseal zones which are rotated through every 6 years. The process begins in early spring when ACHD crews begin to prep future chipseal roads by sweeping them, cracksealing them, and cleaning the roads of debris. Trees are also pruned to help aid chipseal equipment navigate the roadways. Next is the actual chipseal application. An asphalt distributor truck shoots each lane with liquid asphalt. This is immediately followed by a chip spreader applying chips/rocks. Next, a rubber-tire roller sets the chips/rocks into the fresh oil. This orients the rock to produce a tighter chipseal.

Once the asphalt has set (5-10 days later), a sweeper truck will remove the excess rocks. The final step, the fogseal, seals larger sized cracks with a hot material made from rubber and asphalt. This helps to keep water out of the street. Fogsealing is generally applied to all streets that receive a chipseal, unless those roads fall under the ordinance of another agency, or are scheduled to receive an overlay in the next year. The road is safe for motorists to drive on approximately 30 minutes after the fogseal has been placed.

Chipseal season will be completed by the end of August.

Visit this link for more information and to view a map of the Zone 4 Chipseal Area:

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