The City of Oregon City has contracted with Blackline, Inc. to install a slurry seal on selected city streets.

This project will begin on Friday August 21st, continue on Monday the 24th and will be completed on Tuesday August 25th. (depending upon favorable weather) Check the schedule below and note what day your street will be impacted.

Crews will begin staging equipment and preparing streets early in the morning (6:30am), with the Slurry Seal crew not far behind. Generally these crews will work until 5:00 pm.

Slurry Seal Pavement Improvements Q & A’s

Q. What is a slurry seal?

A. A slurry seal is a liquid mixture of asphalt and aggregate spread over the surface of the street. It is a hard wearing surfacing that protects, preserves and extends the pavement life. After curing it provides a pavement that is better to drive on, look at and will reduce the cost in the long run.

Q. Why was my street chosen?

A. Though your street is in basically sound condition, it needs routine maintenance to protect it. Slurry sealing and related maintenances replaces the wearing surface, minimizes raveling and retards water from seeping through the surface which damages the pavement and road base. A slurry seal is effective for 5-7 years. It costs less to apply preservation maintenances than to repair or replace the street.

Q. How long does the process take?

A. First the street must be swept clean and then the slurry is applied to the surface using a spreader box and squeegees. The slurry needs approximately 3 to 5 hours to cure from the time of application. Weather will factor into the curing time.

Q. What if it rains?

A. Slurry seals must be applied to a dry surface. That is also why it is important to make sure any sprinklers are turned off before and during the slurry seal work. If it is raining or if rain is in the forecast we will postpone and reschedule the construction.

We appreciate every effort to minimize the damage caused by hard braking, fast accelerating and sharp turning for a few weeks after the application. Because some raveling of small aggregate is normal and expected, periodic sweeping is scheduled for a few weeks.