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Infiltration Forums > US: Great Lakes > Waded a quarter mile of knee(ish) deep water for what appears to be a drowning pit.(Viewed 1140 times)
MercuryVapor   |  | 
Waded a quarter mile of knee(ish) deep water for what appears to be a drowning pit.
< on 4/15/2020 3:08 AM >
Posted on Forum: UER ForumQuote
I don't know how deep it is... I sure as shit wasn't gonna hop in. Lol I can barely swim. I gotta say I was expecting something more interesting. Maybe if I would have figured out a way to get across I could have found something but I had nothing to bridge the gap. Ironically enough someone spray painted "have fun" directly near the pit lol. On the way through I found a cellphone that was missing it's battery. I wonder how it got down there.


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[last edit 4/15/2020 6:10 AM by MercuryVapor - edited 4 times]

If your uncle Jack were stuck on a roof. And he asked for your help. Would you help your uncle Jack off?
Goste location:
SF East Bay
 
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Re: Waded a quarter mile of knee(ish) deep water for what appears to be a drowning pit.
<Reply # 1 on 4/15/2020 5:11 AM >
Posted on Forum: UER ForumQuote
Looks like a "fun" drain with a drop to nowhere. Good thing you were watching your step!



Aran location:
Kansas City
 
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Re: Waded a quarter mile of knee(ish) deep water for what appears to be a drowning pit.
<Reply # 2 on 4/15/2020 7:28 AM >
Posted on Forum: UER ForumQuote
Hard to say just based on the pictures but it could have been a flooded drop shaft to a deeper system. I've seen ones in drains that easily surpass 100 feet deep.



"Sorry, I didn't know I'm not supposed to be here," he said, knowing full well he wasn't supposed to be there.

NotQuiteHuman   |  | 
Re: Waded a quarter mile of knee(ish) deep water for what appears to be a drowning pit.
<Reply # 3 on 4/15/2020 12:20 PM >
Posted on Forum: UER ForumQuote
That flooded part is almost certainly by design. I looks like a plunge pool (often called a sump) to me. Water from up the shaft falls into the pool where it's energy is dissipated. If the falling water were to land directly on bare concrete, it would quickly erode it away.



Deconstrukt location:
Montreal
 
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Re: Waded a quarter mile of knee(ish) deep water for what appears to be a drowning pit.
<Reply # 4 on 4/15/2020 1:44 PM >
Posted on Forum: UER ForumQuote
Posted by NotQuiteHuman
That flooded part is almost certainly by design. I looks like a plunge pool (often called a sump) to me. Water from up the shaft falls into the pool where it's energy is dissipated. If the falling water were to land directly on bare concrete, it would quickly erode it away.


I totally reckon this looks like a sediment pit, or as you say some sort of energy dissipator.

Nice post, OP, keep up going in draynes.

Edit: just wanted to say that pic #6 is pretty cool, reminds me of a keyhole


[last edit 4/15/2020 1:45 PM by Deconstrukt - edited 1 times]

Vade in cloacas.
Astro
Usually naked
 
location:
The Delta Quadrant
 
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Re: Waded a quarter mile of knee(ish) deep water for what appears to be a drowning pit.
<Reply # 5 on 4/15/2020 8:54 PM >
Posted on Forum: UER ForumQuote
Posted by Deconstrukt


I totally reckon this looks like a sediment pit, or as you say some sort of energy dissipator.



I was thinking sediment pit as well. I've seen these a few times and I've always assumed they work much like the catch in a kitchen sink does.



[02:33:56] <Valkyre> Astro your whole life is ruled by the sentence ' life is better without clothes on'
[22:16:00] <DSomms> it was normal until astro got here
Astro: Patron Saint of Drains
MercuryVapor   |  | 
Re: Waded a quarter mile of knee(ish) deep water for what appears to be a drowning pit.
<Reply # 6 on 4/15/2020 9:11 PM >
Posted on Forum: UER ForumQuote
How deep are sediment pits?



If your uncle Jack were stuck on a roof. And he asked for your help. Would you help your uncle Jack off?
Deconstrukt location:
Montreal
 
 |  | 
Re: Waded a quarter mile of knee(ish) deep water for what appears to be a drowning pit.
<Reply # 7 on 4/15/2020 9:56 PM >
Posted on Forum: UER ForumQuote
Posted by MercuryVapor
How deep are sediment pits?


It depends, sometimes they're merely 2 feet deep, sometimes 6 feet or more. It's generally a good idea to avoid these unless you've probed them with a tripod or long stick, so you know how deep it goes. Even then, the sediment buildup at the bottom might release trapped gases (some of which can be nasty) if it is disturbed.



Vade in cloacas.
Radio2600 location:
On the Road to Wellville
 
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Re: Waded a quarter mile of knee(ish) deep water for what appears to be a drowning pit.
<Reply # 8 on 4/15/2020 11:08 PM >
Posted on Forum: UER ForumQuote
A simple, but not terribly accurate way to judge depth is to just carry some fishing line, tie to a kilogram size rock and throw the rock in the water. Remember to hold on to the fishing ling.

A fun thing to try is to duct tape a fusee to rock and throw the lit fusee in the water. Use a 5-minute RAILROAD fusee because will burn underwater. The 30 minute highway fusees seem to go out as soon as they hit the water. I've had much more success with railroad fusees. You want to throw it in the water as soon as the filler starts burning, but before the paper casing starts burning.

If the pit isn't terribly deep and the water is clear, it turns it into a glowing red pool of water.




[last edit 4/15/2020 11:08 PM by Radio2600 - edited 1 times]

In order to use your head, you have to go out of your mind.
Astro
Usually naked
 
location:
The Delta Quadrant
 
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Re: Waded a quarter mile of knee(ish) deep water for what appears to be a drowning pit.
<Reply # 9 on 4/15/2020 11:24 PM >
Posted on Forum: UER ForumQuote
Posted by MercuryVapor
How deep are sediment pits?


I can't speak for all of them, but I also needed to know. When I measured one in Houston, it was about 5.5 feet deep. I remember this so well because that's how tall I am head to toe.

We used a rope tied to a brick, knotted at every foot.



[02:33:56] <Valkyre> Astro your whole life is ruled by the sentence ' life is better without clothes on'
[22:16:00] <DSomms> it was normal until astro got here
Astro: Patron Saint of Drains
Radio2600 location:
On the Road to Wellville
 
 |  | 
Re: Waded a quarter mile of knee(ish) deep water for what appears to be a drowning pit.
<Reply # 10 on 4/16/2020 4:22 AM >
Posted on Forum: UER ForumQuote
Posted by Astro


I can't speak for all of them, but I also needed to know. When I measured one in Houston, it was about 5.5 feet deep. I remember this so well because that's how tall I am head to toe.

We used a rope tied to a brick, knotted at every foot.


Sediment pits are usually only used with catch basins (aka street drains).



Posted by NotQuiteHuman
That flooded part is almost certainly by design. I looks like a plunge pool (often called a sump) to me. Water from up the shaft falls into the pool where it's energy is dissipated. If the falling water were to land directly on bare concrete, it would quickly erode it away.


I agree with the plunge pool hypothesis.

Posted by Aran
Hard to say just based on the pictures but it could have been a flooded drop shaft to a deeper system. I've seen ones in drains that easily surpass 100 feet deep.


That sounds like an exfiltration weir which allows water to flow directly into an aquifer. If the rate of inflow exceeds the percolation rate into the aquifer, the weir would overfill and the excess water would go to the outflow.

An exfiltration weir could be hundreds of feet deep in order to reach the aquifer. Although these would not appear to be full in normal circumstances and the water level in the weir would be at or close to the water table.





In order to use your head, you have to go out of your mind.
Astro
Usually naked
 
location:
The Delta Quadrant
 
 |  | 
Re: Waded a quarter mile of knee(ish) deep water for what appears to be a drowning pit.
<Reply # 11 on 4/16/2020 4:30 PM >
Posted on Forum: UER ForumQuote
Posted by Radio2600


Sediment pits are usually only used with catch basins (aka street drains)



In which case, that's exactly what it was that I encountered. It was built in a "newer" section of houston. Simply meaning it was slapped in there to protect a subdivision and routed to the bayou.



[02:33:56] <Valkyre> Astro your whole life is ruled by the sentence ' life is better without clothes on'
[22:16:00] <DSomms> it was normal until astro got here
Astro: Patron Saint of Drains
NotQuiteHuman   |  | 
Re: Waded a quarter mile of knee(ish) deep water for what appears to be a drowning pit.
<Reply # 12 on 4/17/2020 3:36 PM >
Posted on Forum: UER ForumQuote
It could be a sediment trap, but unless there's more going on there, it would not be very efficient. Turbulence from a rain event would keep much of the sediment in suspension and it would just continue on it's way down the drain.

These are the style that they've been installing more recently in my area. A bit more efficient, although complex way to catch sediment and debris.

https://www.youtub...atch?v=m9b05au0eAs



Infiltration Forums > US: Great Lakes > Waded a quarter mile of knee(ish) deep water for what appears to be a drowning pit.(Viewed 1140 times)
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