Ada County Highway District

News and Press Releases Friday, May 24, 2019

Chip seal season to begin next week

Meridian -  The Ada County Highway District will begin chip seal treatments starting Tuesday, May 28th on select streets in Meridian.

 This year, ACHD will chip seal and fog seal nearly 450 lane miles of roadway. Chip sealing helps extend the life of the road by helping to seal and protect it from weather and wear. 

Chip seal photo

 The Highway District has divided the county into six chip seal zones with one area receiving work annually. Maintenance Zone 2N, the area west of Five Mile and north of I-84 to Fairview and Ustick will receive chip seal treatments this summer.

In certain areas, "No Parking" signs will be placed by the sidewalks next to the street 24 to 48 hours in advance of the work beginning. Once the work begins, motorists are prohibited from parking on the street. Vehicles remaining on the street will be moved to a nearby street unaffected by the maintenance. Residents and businesses will receive notices five to ten days before the actual work begins. This notice will inform them of the intended time frame for work to begin, however all work is weather dependent). 

Motorists should take care when driving through a chip seal zone. It is very important to follow posted speed limits and other instructions to help prevent oil and chips from damaging vehicles. 

An asphalt distributor truck coats each lane with liquid asphalt. This is immediately followed by a chip spreader applying chips. Next, a rubber-tire roller sets the chips into the fresh oil to produce a tighter chip seal. Once the asphalt has fully set, which takes about five to ten days, a sweeper truck will remove the excess rock. The final step, the fog seal, is a second application of oil that controls loose rocks and dust and provides a fresh surface for pavement markings. The road is safe for motorists to drive on approximately 15 minutes after the initial chip seal or fog seal has been placed.

Chip seal season is expected to be complete by September.

More information can be found on the chip seal maintenance page.

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