Ark flow: when do they turn the water off? - Mountain Buzz
 



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Old 07-26-2018   #1
 
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Ark flow: when do they turn the water off?

A month or so ago someone posted that ark is supposed to get water release through Aug 15? Any update on this? Numbers was fun last week at 450 (below granite). Enough flow to go from stealth to the grassy knoll. Looks like 380 today.

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Old 07-26-2018   #2
 
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And someone else, me, corrected that bad info. Look at the gauge now and you'll have your answer.
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Old 07-26-2018   #3
 
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Dropping now. Sounds like there will still be releases for another week or maybe two. As of now there is 150 cfs coming out of Twin Lakes above the native flow. If they cut the releases completely the flow on Numbers is going to drop to 275... Just looking at the current storage in Twin Lakes I would guess they will release another 7k acre ft or so before cutting it off completely. At the current release level that amount of water will last about +/- 10 days.
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Old 07-26-2018   #4
 
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thanks, great info. will try to get up next week. btw, is it just side streams that account for difference between the below granite and nathrop guages?
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Old 07-26-2018   #5
 
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Quote:
Originally Posted by treewell View Post
thanks, great info. will try to get up next week. btw, is it just side streams that account for difference between the below granite and nathrop guages?
Yep. You have Frenchman Creek, 3 Elk Creek, Fourmile Creek, Cottonwood Creek, Chalk Creek and Browns Creek that come in before the "near Nathrop" gauge, which is actually located at Hecla Junction.
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Old 07-26-2018   #6
 
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Ouch. I'm glad I got on it earlier this week when it was a raging 575! (and really glad I caught it at 1,200 peak flow...)

Thanks for the info, y'all,

-AH
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Old 07-27-2018   #7
 
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Phil- Can you re-post your correct info? I had heard that we may get a small boost on august 1? thx
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Old 07-27-2018   #8
 
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I presume the answer to this is too complex, but curious what discussion there has ever been about alternating the flow of the Ark between day and night so that not quite so much water gets pushed through during the middle of the night when (I presume) no one recreationally cares. I know the water flow out of Flaming Gorge alternates wildly between night and day. You would presume the flows would be much more boater friendly if they alternated it as such.
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Old 07-27-2018   #9
 
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I think that Flaming Gorge is a hydroelectric project and, like Glen Canyon Dam, releases to meet the daily electricity demand fluctuations.

My understanding is the flow on the Ark is released at a constant rate because the fluctuations in discharge take a couple of days to get from the dam to Canon City. They just can't time the flows for maximum daytime recreation for the whole AHRA section.

-AH
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Old 07-27-2018   #10
 
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291 now for the numbers. Did they just shut it off?
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