Update (June 19, 2020) --
The Streets Levy achieved a major
milestone in 2019: completion
of Kirkland’s once-looming backlog of
maintenance-needing neighborhood streets.
Now, instead of racing to maintain
residential roads before they deteriorate
beyond a point of no return, the City of
Kirkland is resuming its slurry seal program
in 2021, when it will have a critical mass
of streets in need of maintenance to attract
contractors’ competitive bids.
“The Streets Levy has accomplished its first
major goal,” said George Minassian, Kirkland’s
streets engineer. “It has prevented scores of
neighborhood streets from deteriorating to the point
they are no longer treatable in a cost-effective way.”
Map of Slurry Seal History
(pdf 1 MB)
How Kirkland chose your neighborhood road for slurry seal and why (pdf 2.4 MB)
Senior Neighborhood Services Coordinator
(425) 587-3831, email@example.com
George Minassian, P.E., Ph.D.
(425) 587-3829, firstname.lastname@example.org
Kirkland extends the optimal life of neighborhood streets every year by applying a slurry seal to their surfaces.
This quarter-inch layer of water, aggregate and emulsified asphalt--oil--shields the pavement beneath it from weather and replenishes that pavement with new aggregate.
These functions can extend roads’ good conditions for five to 10 years. And all it costs is $1,600 per city block, compared to the $17,000 per city block it costs to repave a road or the $65,000 per block it costs to rebuild a road.
The cost-effectiveness of slurry seal is why thousands of municipalities throughout the nation use it and why the City of Kirkland has used it in every neighborhood throughout the City since 2002
These benefits, however, can be hard to see in the first few weeks after the streets first receive slurry seal. Initially, the surface is gritty
, where it was once smooth. This initial grit is normal. But it is not permanent.
The first phase of your street’s transition toward smoothness is the street sweeping, which removes all of the loose gravel. This occurs approximately one week, three weeks and three months after application. The second phase of that transition is more subtle. And its main ingredient is time.
Over time, automobile traffic will dislodge the larger, sharper pieces of aggregate that initially give the road its rough, gritty surface. Traffic will also push the remaining aggregate deeper into the surface.
Within a year or so, the smooth road residents remember before slurry seal will be back—with an extra five to 10 years of high-quality life infused into it.
2012 Streets Levy
The 2012 Streets Levy is doubling the number of lane miles the City of Kirkland can slurry seal each year. Kirkland has a goal of treating every residential street in the City with slurry seal by the year 2032.
October to February: Street selection and design
November to January: Surveying and data collection
March to June: Prepping, grinding, repaving and striping Lake Washington Boulevard
May to July: A.D.A. upgrades to curb ramps
July to September: Repaving arterials
July to September: Treating neighborhood roads with slurry seal