February 1, 2007
This week, crews finished drilling the first row of nails into the hillside, and have begun on the second row.
The nails are led into the ground by this two inch sacrificial (meaning it stays in the ground) bit. Crews have drilled through a number of different types of earth including clay, wood, rocks and sand.
Crews are also installing a temproary drainage pipe on the north side of US 2. This pipe will divert water from the existing pipe under the roadway while crews make permanent repairs to it.
February 14, 2007
The bottom of this existing pipe has corroded allowing water to seep into the hillside and saturate the earth. We are working this week to line the existing pipe with a new pipe.
Crews have finished installing 91 soil nails. This is up from the original 66 nails because crews ran into more unstable soil than they had expected. They have also installed the drainage mat and begun work on the concrete wall.
February 23, 2007
This week crews connected five 25-foot pipes that will line the corroded pipe. To connect them, crews used a type of welding technique that heats the ends of the pipe then pushes them together. Once they cool they are permanently bonded.
Once crews had a complete 125-foot-long pipe, they had to pick it up and maneuver it through the woods to align it with the current pipe.
Then they threaded the new pipe into the old, corroded pipe to give it a new lining.
Crews have also completed the concrete portion of the soil nail wall.