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Post by acidohm on May 6, 2023 7:01:13 GMT
Still holding....looks slushy tho, the river has lost its ice downstream where it junctions with another river.  |
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Post by walnut on May 6, 2023 14:01:15 GMT
Seems like scraping the snow back like that might change the melt rate at that spot. It's probably mainly melting from underneath.
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Post by neilhamp on May 6, 2023 18:03:26 GMT
List of winners since 2016 2016 23rd.April Icefisher 2017 30th.April phydeaux - (BREAKOUT on 1st.May) - 2nd.May NeilHamp 2018 1st.May acidohm 2019 13th.April birder - (BREAKOUT 0n 14th.May earliest on record) 2020 (Apr.27th. BREAKOUT) - Apr.28th neilhamp 2021 Apr.30 phydeaux 2022 May 2 blustnmtn 2023 May 9 douglavers (BREAKOUT May 8th. 4.01pm) Congratulations Doug www.nenanaakiceclassic.com/ (Scroll down for web cam) acidohm and Ratty April 25 gridley April 26 youngjasper April 27 walnut April 28 neilhamp April 29 phydeaux April 30 code (April 31st) blustnmtn May 1 glennkoks May 2 nonentropic May 3 missouriboy May 4 sigurdur May 5 wheels59 May 6 BREAKOUT May 8th. 4.01pm douglavers May 9 |
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Post by acidohm on May 6, 2023 18:18:24 GMT
Seems like scraping the snow back like that might change the melt rate at that spot. It's probably mainly melting from underneath. I wondered that, but then I saw a video on how they erect it and it makes sense. It's assembled on the ice. Not sure if that's how they always did it. They falling of the tripod occurs from the ice breaking apart also, not just melting per se. |
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Post by nonentropic on May 6, 2023 19:26:55 GMT
that tripod still looks ok we may not have a winner this year
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Post by douglavers on May 7, 2023 1:15:19 GMT
Rubbish - things are going really well!!
Anyhow, don't I get a prize if the tripod lasts beyond my birthday?
Last man standing!!
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Post by ratty on May 7, 2023 2:09:48 GMT
that tripod still looks ok we may not have a winner this year Nearest correct entry wins, doesn't it Neil? |
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Post by walnut on May 7, 2023 3:06:55 GMT
that tripod still looks ok we may not have a winner this year Nearest correct entry wins, doesn't it Neil? I would think that if it comes after, Doug would win (?) |
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Post by neilhamp on May 7, 2023 5:28:13 GMT
Ratty & Walnut,
Rules have never been formally declared
Winners for 2017, 2019, 2020 were declared on the basis of "nearest correct entry".
There is still a competition between Doug and wheels until midnight tonight.
After today Doug is this years winner!
Neil
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Post by nonentropic on May 7, 2023 8:21:42 GMT
you the bos
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Post by douglavers on May 7, 2023 12:00:45 GMT
I am a complete novice when it comes to frozen rivers. I would have thought that the catalyst for cracking the ice would be a large volme of meltwater from upstream raising and thereby ripping the surface, not the ice actually melting.
Most of Alaska is still frozen.
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Post by missouriboy on May 7, 2023 12:38:44 GMT
I am a complete novice when it comes to frozen rivers. I would have thought that the catalyst for cracking the ice would be a large volme of meltwater from upstream raising and thereby ripping the surface, not the ice actually melting. Most of Alaska is still frozen. Exactly Doug. You have grabbed the essence. Charles Oscar II appears to be asleep at the controls, and nobody in the supposed control room can tell us why. We need to sack the whole lot. |
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Post by acidohm on May 8, 2023 6:15:54 GMT
Time nearly over. Note simply falling over doesn't trigger the timing device, the tripod needs to move from its erected location, ie, the ice breaks up and river flow moves it.  |
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Post by acidohm on May 8, 2023 6:26:25 GMT
From wiki..
The "tripod", which actually has four supports, is planted on the river ice between the highway and railroad bridges in Nenana, 300 ft from the shore. The tripod is connected to a clock which stops as the ice goes out, moving the tripod with it. The Nenana Ice Classic annual festival is the time that the tripod is erected on the ice of the frozen Tanana River. The tripod parts are built and painted prior to the festival sourcing local timber and enlisting community members. Using a chainsaw, a trough is carved into the river ice which is usually around three feet thick at that time of year. The base of the tripod is lowered into the trough. An auger is implemented to bore a hole further into the ice until the river water is released, flooding the trough. This will freeze the tripod securely to the frozen river. As a high point during the festival the community gathers together and using ropes attached to the tripod uprights they work together to lift the uprights into place. The uprights are then secured to each other. A line is attached to the top of the tripod and once that end is anchored the other end is taken to the Ice Classic tower nearby on the banks of the river. Attached there to the clock inside the tower, when the ice goes out and moves the tripod 100 feet the line breaks and stops the clock.
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Post by acidohm on May 8, 2023 6:36:44 GMT
The first sign that breakup of ice will occur at the tripod, is the river becoming exposed downstream past the rail bridge at Nenana. Breakup moves upstream as ice gains free movement into open water. Pretty sure that rail bridge helps contain the ice where there tripod is at red dot. It's the rising spring sun helping to melt the ice on the surface which I'm guessing frees the ice from the rail bridge structure, generating sudden release of ice at tripod location. It was rail Road engineers who started an ice breakup competition in 1917, rail bridge was constructed in 1923. Purple arrow is direction of ice breakup, opposite to river flow.  |
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