As the arena turns...
So the drilled pier contractor hit an existing storm line 3 times while drilling caissons.
The first time the foundation contractor hit the 30" line they poured up to the flow line and stopped. The second time they hit the pipe was close to the CMU wall and they stopped.
After they hit the line the second time we were asked by the GC to uncover the existing 30" storm line from the building to the pump station in order to figure out the extent of damage. We potholed the line in a few places and then had a big on-site white hat meeting with folks wearing shiny shoes - ya'll know that type of meeting. Luckily this time around we weren't the focus of it.
During the meeting I asked the drilled pier super about the last caisson they poured that was in a direct line along the existing 30" from the building to the pump station if they run into anything unusual - He replied no. 5 minutes later he spoke up and said "Well we did dump some extra mud in that hole". I asked how much? He said - "It called for 7 CY's and we dumped 16 CY's". I turned around and told the PM - your storm line is full concrete.
The third caisson that filled the line can be seen in the bottom of the pic below - straight inline.
So we were awarded a nice CO to replace filled line.
1970's quality workmanship right here. 30" RCP cut on a 45 and not even grouted. This is where the 30" line that drains the entire arena complex dumps into a pump station with 2 Cat powered 8" pumps that dumps into the box culvert we replaced up thread.
The gap in that 45 was the way they installed it.
The concrete filled pipe looked like a corn dog.
Site access was tight to say the least. Yeah we knew the dangers of hammering that close to that deep of a trench but there wasn't another way. There is a fiber optic line underneath the track frame closest to the ditch and a 6" med pressure gas main running under the center of the 325. The hammer purchase has earned it's cost.
Good talent is priceless ya'll.