What is the deepest...

The manhole in front of my house is about 26' deep. I watched them construct it. They had to stack trench boxes on end. Couldn't pay me enough to do the grunt work down at the bottom.

I installed 18'' C900 in Dane County Wisconsin for MMSD deepest invert was Cut of 42.56 by the time we dug for the bottom of structure and base was about 45' cut?ÿ

I talked to guy form MMSD and asked him what the deepest pipe they had under their jurisdiction and he looks at me and said you're putting it in right now.

?ÿ allot of stress on that job lost nearly 40 pounds in 4 months there climbing in and out of trench boxes all day and shooting grades. ran at?ÿ .083 % or something dumb like that 24 inches of fall over the entire run I want to say it was like 5000 some feet of pipe.?ÿ

Looked into one that was supposed to be on the order of 30 feet.?ÿ Did not have to measure it.?ÿ The city guy just liked to show it to people as it was the deepest in that town.

@ragoodwin

I thought he was gabbin' about being robbed by a hooker.

Around 40'.?ÿ It was a 54" outfall file heading to the WWTP.?ÿ The flow was about half-way up the side of the pipe and roaring like the ocean.?ÿ Young Paden decided to tie a brick 'precisely' to the end of a roll-up tape to find the bottom.?ÿ When the brick hit the influent it took off like a rocket, the cloth tape burned my hand and in about 3 seconds snapped the reel out of my smoking hand.?ÿ This would indicate about 30 fps...?ÿ ?ÿ

We checked with the plant operator for flow charts.?ÿ We later went back out at 3 AM and got a better reading.?ÿ The operator heard my story and later tried to give me back what they found on the bar screen at the Parshall flume..with a grin on his face.?ÿ ?ÿ

I thanked him but quickly chunked it all in the dumpster. 😉

I can't come anywhere close to deepest, my experience bottoming out at around 25 feet below surrounding ground.?ÿ But I may win the prize for lowest:?ÿ in some places the inverts were below MSL.?ÿ That made figuring and marking cuts a little extra challenging.

Chicago has a storm drain system 350 ft below grade.?ÿ

I opened a sanitary sewer in downtown StL that was pretty close to the bottom of the line. Base map showed the diameter of about 8 feet. I extended the rod all the way to 25 feet and lowered it down. By the time the bottom of the rod hit the water I was holding on to the last section of the rod. The flow sucked the whole thing out of my hand. The entire 25 foot pole went down the drain like a piece of spaghetti in the kitchen sink.?ÿ