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News from King County Transportation
Updated:
Wednesday, July 3
, 2002

Deep hole near Woodinville now filled and sealed

It took more than six truckloads of cement, but the deep hole in a county road near Woodinville is now filled and sealed.

For 10 days, the abandoned water well that opened up on a quiet residential street in unincorporated King County captured the attention of local residents and people around the world.

The story was picked up by CNN, NPR, ABC Radio, the Associated Press, and even two Web sites devoted to paranormal activities .It was a story with mystery and drama driven by initial reports that the shaft was as deep as 1,000 feet. But, later video taping indicated the shaft was only 236 feet deep with a smaller pipe inside the shaft dropping to 257 feet below the street’s surface.

Still, it was a big hole and when a contractor showed up to fill it today, it took more than 55 cubic yards of cement to do the job.
 

  cement mixer filling hole

 

 

 

 

 

 

 

 

 

 

Fixing a hole: it took 55 cubic yards of cement to fill in the abandoned well. [enlarged view]

crews applying asphalt seal
The final seal was applied on July 1.

[enlarged view]

Before the big fill, county crews consulted with state engineers and reviewed the history of the neighborhood. All the information and video observation convinced them the hole was originally drilled for a water well near a long-gone farmhouse. The shaft did not appear to connect to any other holes, tunnels or underground voids.

King County developed a plan for closing the old well with non-polluting materials. The plan was approved by the state Department of Ecology. The cement was poured in the shaft to within three feet of the surface, and now it will sit for a few days. Then, a larger square cut will be made in the roadway and repaved to create an even road surface on top and around the filled hole.

 

view inside abandoned water well
graphic: video camera
See what was below in two videos: inside the pipe [35 seconds, requires free RealOne player, taken by Russell Di Gino of Woodinville, and down the shaft [96 seconds], taken by GELCO Services of Auburn. The numbers in the second video mark the number of feet below street level.

News coverage [external links]
"Seattle Hole," National Public Radio Weekend Edition, June 29, 2002, listen to the 3-minute RealMedia file
"Woodinville's mystery hole is filled, but debate persists," Seattle P-I, June 26, 2002
"Area abuzz over hole in the ground," Woodinville Weekly, June 24, 2002

"Now you know the hole story," Seattle P-I, June 21, 2002
"Mystery hole found in Woodinville," Eastside Journal, June 20, 2002
"Crews plumb mystery hole," Seattle Times, June 19, 2002
"Bottomless Pit Discovered In Woodinville?," KOMO 4 News, June 17, 2002

"Deep sinkhole opens up in Woodinville," KING 5 News, June 17, 2002

King County Department of Transportation
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Updated: July 3, 2002
 
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