Just as we were finishing some scanning, a rainbow appeared...
Part of the job was to locate the alignment of a water tunnel:
First setup:
Inside:
Nice pics!! But where is the pot of gold?? 😉 😀
John,
Nice pics indeed and looks as a fine job!
Did you have to take any special safety precautions?
I've seen more pictures that you posted here with your feet wet ... do you prefer these kind of jobs or is it just coincidence?
Chr.
Just a PFD (personal Flotation Device).
We took a four shot section (bottom, top, left right, 10 foot diameter circular tunnel) every 50 feet for the 1400 foot length.
There are two other water tunnels under dams (not drilled, but rather built and then filled over) we do each year for settlement. The several that were drilled or blasted through rock don't settle, they just don't know exactly where they were built (i.e. no as-built can be found).
The client (for the last 7 years) is the US Army Corps of Engineers. Besides being part of the military, they have a civilian side. The Pittsburgh District is one of a multitude of public works ditricts, and their concern is water-flood control, navigation, etc.
In this particular district they have 16 large dams, 23 navigation locks and dams, and many local flood control projects. So, yes, almost all we do for them is on or around the water.
Fortunately I grew up on one of the three rivers here, swimming in it as a kid and doing a lot of boating, fishing, etc.
I enjoy it. Even in the winter:
This part was deep:
What's with the water jobs lately?
Where's a turning point...
and this stuff was like walking through pudding!
Both sites had cross-running ditches to fall into.
Good to use a rod to prod along.
In my opinion, if you think you need chest waders, what you really need is a boat. You can fall out of a boat and drown, but you have to work at it. Drowning in chest waders is a piece of cake.