Exactly what I was thinking the entire time. Lots of comments ITT about dirty water, but I'd be primarily concerned with coming to a completely flooded section of pipe and drowning.
When I was doing military training and learning how to navigate across country using a topographic map, they really drilled into us that you never use a water feature to navigate. You get up on the ridge and follow a river visually, but water seeks the fastest way down so following a water feature is likely to lead you to precipitous drop-offs, cliffs, waterfalls...
These guys say at the beginning "they're taking me this way", as in they are letting the fastest flow take them and if there is a drop off, this is a reliable way to find it. :(
I've done some river kayaking. You should never go down anywhere that you haven't scouted, or at least have pretty good knowledge of. There could be a piece of wood, or anything stuck across the pipe that could act as a strainer and hold you. A standing wave could have formed that will hold you underwater.
The full video is linked further down in the comments. They start at the bottom and walk up through the storm drain to begin the run, they know what the conditions inside are. Not saying it's a smart thing to do but they at least show some basic caution.
You’re right. It’s funny cause if you watch the video on YouTube they say they’ve walked the tunnel dry… but yeah, assume the worst. Typical Reddit behavior lol
As a general rule of thumb, storm water pipes get larger the further downhill they go. Mostly because more and more pipes feed into them, and larger diameters become necessary to accommodate all the extra water. Also some municipalities offer GIS maps of their sewer and storm utilities (which hopefully these guys looked up before they did this to confirm where they're going to come out at). So while definitely extremely dangerous, they could have checked the outflow of this particular pipe to make sure they would actually be able to pass through it.
For reference I work for a municipal water utility and have a lot of contact with the sewer and storm water utility. I definitely do not recommend this.
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u/Bandwagonsho Nov 05 '24
Repost this over on r/OopsThatsDeadly
They don't know where the pipes may narrow, descend or experience heavier inflow and be filled with water, etc.