Anybody know what is the maximum rate they can let water out if need be? Saw where Grenada was at 5100 and was just curious.
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Anybody know what is the maximum rate they can let water out if need be? Saw where Grenada was at 5100 and was just curious.
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They can do a little more than that at Grenada, have seen it even with the sidewalk down there and it was prolly 3 feet below that last night.
Guess its safe to say its more than 5100 then..... Next question is how much water does 5100 or more take off the lake a day????
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Took just over 5 inches from Sunday at noon till yesteday at noon, on a stand still now with this rain and will most likely be on a rise at next hours report. This link shows Genada and you can navigte from there to show the others, you can check levels all the way bck to when they were built.
Rivergages.com - Station Information ForYalobusha River @ Grenada Dam (Inlet)
So would it be reasonable to say that for every 1000 cfs the dam is open be equivalent to approximately a .1 off the lake a day?
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Be close but water level comes into play and each lake is different, been watching and logging some stuff in a journal for a couple of years now on Grenada. If the lake is in the 190s that formula works pretty good get to the 205 and up range and its less than that.
With the rivergages link and dated pics I dont have to put as much in the journal, mostly like amp access at water levels and such.
Max flow at Sardis is around 7500 cfs. I don't think COE can do that now with lake near minimum pool. Just not enough water to fill up the outlet tunnel.
agree with Pops. even with the lower flow right now there is a strong current for sure (at the intake that is)
Hydralic capacity is the term you looking for to describe the max. discharge which is 52,000 cfs.
To figure drawdown amount, convert flow (measured in Cubic Feet per Second) in your time period (12 hr or 24 hr) to acre-feet. Acreage of the reservoir at full pool is often listed (9800 acres).
GRENADA DAM DAM (Grenada Lake)
Just quick estimate puts 5200 cfs for 24 hours at about 4-5 inch drawdown (minus any new inflow) for a 10k acre lake.
Not sure that 52000 is possible, pipe was dang near full yesterday with 5100cfs coming out, no way they can get 10 times that much more out unless lake level could push more out when it is high. Cool link, thanks.
The maximum discharge shown on the link must include emergency spillway, since it shows spillway as "uncontrolled" and spillway width as
200'. No way the outlet tunnels can exceed around 7500 cfs.
Bet you are dead on Pops, they got he shut down here now and we on a big rise again.Quote:
Originally Posted by Pops
Latest Rivergages.com is showing precip. at Grenada Dam as 1.95". The COE will always shut the spillways off when the dam area gets 2" of rain in several hours. We did not get that much in the Sardis area.
Yeah they may have just cut it back but at 5100cfs and near 2 inches of rain it would flood Genada, noticed the level was down 1.40 in the spillway. So much for snaggin Thursday night.
You could always spotlight some deer in the park or go hang some yoyo's. Maybe you can find some turkey's to shoot off their roost.....pffffffftQuote:
Originally Posted by Rees Guide
Naw, dont spotlight till February and aint played with yoyos in a while. :biggrinQuote:
Originally Posted by feelay
John....you need to tighten up. You don't see feelay, ATM, and Handie worried about the water levels.....they just go out and catch fish. :biggrin
Not on Grenada they dont, maybe at Sardis and aint been great there lately.
If they went to Grenada they would still catch fish ya big gewber :biggrin Thats just how they roll. Always remember the important facts....if your not doing it like they are then you are doing it wrong. :biggrin
They better than me. :biggrin
And yes they worry about water levels, bet ole Stan has a number in his memory banks after yesterday.:yikes
the number aint the problem--its the area he wondered into.
the number and the area co-inside, bet when he puts his boat in and the number is the same as it was yesterday he wont be going to that area. To me, maybe not everyone, but water levels dictate where I launch my boat and what areas I try to fish, its just part of learning, at least for me.Quote:
Originally Posted by KDAVID1
Sardis is up about 2.5 feet right now, two weeks ago he could walked in that area and not got his feet wet.:RoflQuote:
Originally Posted by Rees Guide