SR 96 - Seattle Hill Road Slide Repair Project Photos

Crews are replanting the hillside near the newly-repaired roadway.


Crews completed repairs and reopened SR 96 to traffic on Dec. 31, two weeks ahead of schedule.


Drivers may see single-lane closures on SR 96 between 9 a.m. and 2:30 p.m. until mid-January as crews complete permanent striping and replanting.


The stream is now running through the new culvert. Crews began building the retaining walls on Dec. 20.


Crews began installing the new culvert on Tuesday, Dec. 18, working overnight and into Wednesday morning. They lined the bottom of the culvert with about three feet of streambed gravel.


Crews used a 360-ton crane to maneuver the culvert sections into place. For a size reference, note the worker standing next to the crane base.


Each lid weighs 10 tons and each bottom section weighs 15 tons.


The culvert is made up of seven sections, each 12 feet long. See diagrams of the culvert design.


Crews spent the first week installing erosion control, diverting and pumping water, removing the damaged pavement and excavating the site in preparation for the new culvert. 



Crews are working seven days a week to repair SR 96 and open the road to drivers.

  
Underground and above ground utilities had to be relocated before crews could begin repairs.

 
Flooding on Dec. 3 collapsed a culvert and washed out the ground beneath a section of SR 96. The hole beneath SR 96 measured 40 feet long by 25 feet deep, leaving nothing to support the remaining asphalt. The spray-painted line in the picture on the right shows how far the hole stretched under the roadway.