Who's been "Dam Sliding"?

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lxskllr

No Lifer
Nov 30, 2004
57,946
8,200
126
I can take a longish walk to that dam. People go, but I've never been. People also get cut by rebar there. Also, keep in mind it belongs to the military, and they keep an eye on it ;^)
 

Red Squirrel

No Lifer
May 24, 2003
68,385
12,582
126
www.anyf.ca
Sounds like fun, but unless this is something that is well known and that people are allowed to do, I'd be scared of getting caught. Also if it's not something that is typically done, there could be dangers that you may not be aware of like something sticking out. But if this is "a thing" then chances are it should be clear and safe.

Here they have constant PSAs about staying out of dam areas since they can open/close at any time depending on hydro demand.
 

Jim S.

Junior Member
Jun 15, 2017
5
1
16
Looks cool except for the 4 whatevers that are causing the whitewater at the bottom. Pipes, some vent thing? A yoga mat or plastic bin lid would make it mo better fast, imo.

"It's always great until we hit a tree."


They are just "dimples" in the concrete. I completely ran over one and didn't even feel it.
 

Jim S.

Junior Member
Jun 15, 2017
5
1
16
Sounds like fun, but unless this is something that is well known and that people are allowed to do, I'd be scared of getting caught. Also if it's not something that is typically done, there could be dangers that you may not be aware of like something sticking out. But if this is "a thing" then chances are it should be clear and safe.

Here they have constant PSAs about staying out of dam areas since they can open/close at any time depending on hydro demand.


Thanks for the warnings. People have been riding this thing since they built it. This is a state park and it is a recreational lake. It's an earthen dam and the spillway is just there to maintain the water level. There isn't even a flood gate.

There is nothing "expressly forbidding" this, but the park rules state that swimming is only allowed where designated by the Dept. of Natural Resources who operates the park. There is a beach up the lake and that is where you are supposed to swim. However, while I wasn't "caught in the act", a DNR truck drove right by on the bridge while I was standing on the wrong side of that railing going up the steps soaking wet. He took no notice of me.
 

Red Squirrel

No Lifer
May 24, 2003
68,385
12,582
126
www.anyf.ca
Thanks for the warnings. People have been riding this thing since they built it. This is a state park and it is a recreational lake. It's an earthen dam and the spillway is just there to maintain the water level. There isn't even a flood gate.

There is nothing "expressly forbidding" this, but the park rules state that swimming is only allowed where designated by the Dept. of Natural Resources who operates the park. There is a beach up the lake and that is where you are supposed to swim. However, while I wasn't "caught in the act", a DNR truck drove right by on the bridge while I was standing on the wrong side of that railing going up the steps soaking wet. He took no notice of me.

Yeah sounds like you're probably in the clear then. There probably is a dam but it's somewhere else and this is specifically just a spill way. At worse, the flow might stop if they open the dam and level goes down, but could be it's something that rarely happens. Or it could very well be there's no dam at all, this may be strictly to maintain a certain level, and that's it.
 

destrekor

Lifer
Nov 18, 2005
28,799
359
126
Yeah sounds like you're probably in the clear then. There probably is a dam but it's somewhere else and this is specifically just a spill way. At worse, the flow might stop if they open the dam and level goes down, but could be it's something that rarely happens. Or it could very well be there's no dam at all, this may be strictly to maintain a certain level, and that's it.

It is more likely that is literally just a standard dam with integrated spillway, simply to maintain water levels. If that is the case the only time the spillway stops spilling is when water levels drop, but that isn't something that just happens at the push of a button. If it's flowing at its typical rate, something crazy would have to happen in the lake for the flow rate to basically go from 1-2" of depth on the spillway to practically dry or a trickle from the time you start the slide to the time you reach the bottom.

https://www.google.com/maps/place/3...!1s0x0:0x0!8m2!3d39.603033!4d-84.970344?hl=en

To the right of the spillway is the rest of the earthen dam. The spillway is almost certainly the main method of water level maintenance. I'd wager the "dimples" we see on the video at the bottom of the spillway are likely secondary/emergency outlets in the event they need to either drain the lake lower than the spillway's level, or when necessary during flood-like conditions to help lower the lake faster. Looks like the pipe intake is probably in the little hut almost immediately on the other side of the spillway.

Fairly typical earthen dam artificial lake/reservoir construction.
 

Jim S.

Junior Member
Jun 15, 2017
5
1
16
It is more likely that is literally just a standard dam with integrated spillway, simply to maintain water levels. If that is the case the only time the spillway stops spilling is when water levels drop, but that isn't something that just happens at the push of a button. If it's flowing at its typical rate, something crazy would have to happen in the lake for the flow rate to basically go from 1-2" of depth on the spillway to practically dry or a trickle from the time you start the slide to the time you reach the bottom.

https://www.google.com/maps/place/39°36'10.9"N+84°58'13.2"W/@39.6036365,-84.9718566,897m/data=!3m1!1e3!4m5!3m4!1s0x0:0x0!8m2!3d39.603033!4d-84.970344?hl=en

To the right of the spillway is the rest of the earthen dam. The spillway is almost certainly the main method of water level maintenance. I'd wager the "dimples" we see on the video at the bottom of the spillway are likely secondary/emergency outlets in the event they need to either drain the lake lower than the spillway's level, or when necessary during flood-like conditions to help lower the lake faster. Looks like the pipe intake is probably in the little hut almost immediately on the other side of the spillway.

Fairly typical earthen dam artificial lake/reservoir construction.

Exactly. The road through the park follows the top of the dam. There are no gates, just the spillway.

BTW, I found out today that more isn't necessarily better. We had heavy rains on Wednesday and it raised the water level of the lake an inch or two. I have been working in that area and had some time this afternoon and decided to give it a go again. I was a little concerned about the increased flow down the spillway, but I needn't have been. It washed all of the algae away. Without a mat or something to sit on, I nearly stopped once and the concrete ripped through the old shorts and underwear I was wearing. I actually have a slight case of "road rash" but I can still sit down. Luckily no one was around at the time and I had a shirt on that I was able to pull down over my exposed ass. Will get some kind of may for next time.
 

Jim S.

Junior Member
Jun 15, 2017
5
1
16
Looks cool except for the 4 whatevers that are causing the whitewater at the bottom. Pipes, some vent thing? A yoga mat or plastic bin lid would make it mo better fast, imo.

"It's always great until we hit a tree."

Ordered a Yoga mat today from Amazon. Funny how it looks a lot like the mats they used to give you at the old concrete water slides. That's what it's going to be used for again.
 
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