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We have a nearby town named Centralia here in PA. It is, or was I should say, a mining town too. We used to take our 4x4's there all the time and explore. It's an extremely interesting place. You should look it up Long story short, the town dump was on a coal seam. Trash fire lit the seam and it's been burning underground for years. Town was eventually evacuated and closed off. Highway that ran through the town was re-routed around it but you can still get out on it. Looks like a scene from one of those earthquake movies View Quote Wow, thanks, I'll look that up! |
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Yes and no. I feel horrible for the people impacted by this and if something bad does happen, I will support them as best I can. On the other hand, watching the raw power and fury of mother nature and how it compares to our limited understanding of her is fascinating. View Quote View All Quotes View All Quotes Quoted:
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Only a sick person would be hoping for something bad to happen here. I agree 100% with that sentiment, as an old electrical engineer, I am fascinated with the engineering involved to design these dams, hell 10 days ago I knew nothing about an ogee weir, now I can do the calculations to design one to 1 atmosphere given a max head heigth! Lmao! I also pray daily that there will be no loss of life over the coming months. There have been mistakes made, and even some design flaws in the original dam construction, but I'm rooting for the water department/CoE to pull off a miracle on this one. |
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Only a sick person would be hoping for something bad to happen here. View Quote I know you're perhaps half-joking. Behind the surface gloom and doom banter is an underlying positive theme of, 'Cali, please listen to reason in order to save the children - not just today, but in the future.' Discussed here you read multiple methods to prevent destruction. |
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So about 30% of the General Discussion posters? Like the socialist and Marxist have made Trump into their monster allowing all things possibly bad to be said about him including his death the General Discussion have made the state and people of California the focus of their rage. It's been that way for twenty years here. View Quote Oh, that's what it said! |
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apparently this is some access road to the dam, hope it doesn't affect the quarry/concrete trucks https://pbs.twimg.com/media/C49HuRlUEAAtci-.jpg View Quote Nope. Not even close. |
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I think this is basically over but the cleanup. They'll run that spillway wide open before they let it go over the emergency again.
The question is where do they go from here? They aren't getting the spillway repaired between the end of this dry season and the beginning of the next, which means they'll need another option. |
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I saw that and retweeted it to ProFryan. I wonder if he recognizes it. View Quote View All Quotes View All Quotes Quoted:
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apparently this is some access road to the dam, hope it doesn't affect the quarry/concrete trucks https://pbs.twimg.com/media/C49HuRlUEAAtci-.jpg That's Oro-Quincy road aka the back road to Bucks Lake. Closed by snow a ways up the road for the winter. |
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---->Master_of_Orion, Thanks, nice pics, makes it easier to correlate the water level in relation to the outflow.
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A few thoughts. One, much like the military, you never underestimate your competition. Two, it could fit in the bucket of the products I work on. Three, the math associated with that excavator on the barge is delicious. View Quote I've just got to pull your chain a bit. Sounds like we work on similar sized stuff, and think the company I work for actually supplies some components for the big hydraulic shovels even though we are competitors. I love it when people talk about a big back hoe with a 3yd bucket, or a 65T truck. I like to show them the pictures of the ultra class mining trucks I've been on, or the shovels with 50yd buckets or bigger. If we had some of that equipment on site we'd have that channel dredged in no time! |
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... while it's a lovely, drizzling day here in Arizona, I sure wish more of California's moist would make it across the desert to us
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Site with lots of info pre-flood pix Not sure if it was made by a member here or at metabunk or somebody else entirely.
It has many good pictures, including closeups of the dry intakes and spillway at low water, in addition to the plaque that was posted earlier. For the quick and dirty summary of this thread, feel free to add in any known facts or tidbits for people that want to catch up, so that this and the links post above can be incorporated into page 1 and pasted every few pages.: TODO (for somebody else eager?) - Add in bits I've left out, correct errors, and add links to relevant pages in threads to the list below • Maintenance was minimal, inspections were lazy, When problems were found, half-assed solutions were used, like ignoring problem • Due to poor patches on Spillway Chute/Ramp/Sluice, it fell into an erosion channel that shouldn't have existed (lots of water ate away under channel from unknown source for unknown time), instead of finding/fixing erosion and ramp crack reasons from 2005-2015, only the cracks in concrete were repaired. • An Emergency Spillway by definition is a "Recondition after use" item, according to ACOE and FEMA Dam documentation, CA wants it to be "Auxillary Spillway" and have renamed it as such on their site • Second Outlet from Dam at turbine discharge level has been broken since 2009 and simply unused. • Currently, Spillway has dug a pit at outlet, creating sandbars on either side of pit so that standard discharge outlets (turbines) cannot run an additional 13kcfs (13,000 ft³/sec) until dredged • Spillways are built on bedrock, but the yellow bedrock is crap, the orange is OK, and the blue-grey bedrock is the best from what we've seen erosion wise. Lake Oroville Dam
NBC KCRA Ch.3
Oroville Spreadsheet 2011 - Present w/Elevation-Volume by member brass Sheet 1 is data with flow, sheet 2 is elevation <-> volume conversion.
Please share any charts/graphs/derivative works back to member: brass Link and image compilation by SIMJEDI and Master_of_Orion |
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Does nobody realize that half of the entire state of California is rural red maga country? Seems like some folls think everone here surfs daily and is a retard lib. Lots to learn. This is Jefferson State up here. Npr is JPR and it doesnt suck. View Quote View All Quotes View All Quotes Quoted:
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Commiefagians and their green fonts. That whole state needs to break off and sink in the Pacific Ocean. Does nobody realize that half of the entire state of California is rural red maga country? Seems like some folls think everone here surfs daily and is a retard lib. Lots to learn. This is Jefferson State up here. Npr is JPR and it doesnt suck. When California secedes, I want to keep Jefferson in America. That way we don't have to change our flag |
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I've been taking screen captures from the visitor center webcam everyday in the morning and evening since the 15th. so here they are starting on the morning of the 15th. http://i.imgur.com/b5vYX0w.png http://i.imgur.com/oSX8HjX.png http://i.imgur.com/Y90XljQ.png http://i.imgur.com/L0Pby5O.png http://i.imgur.com/caoM1pT.png http://i.imgur.com/z2Hqrzb.png http://i.imgur.com/QwGUEZY.png last pic was today. View Quote It's looking a whole lot better. |
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• Second Outlet from Dam at turbine discharge level has been broken since 2009 and simply unused. View Quote It was partially repaired in 2014 and is now partially usable. 5,600 cfs was the rated flow before the accident, after partial repairs the rated flow is 2,000 cfs per the Mark Andersen 2015 NWHA presentation. The repairs were not intended to restore it for flood emergencies, but the opposite, for drought emergencies when the reservoir is too low to discharge any other way (640 ft). I guess they thought 2000 cfs is enough for that and decided to leave the energy dissipator baffle ring out of the repairs (it was found eroded and was removed entirely). |
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View Quote Reading between the lines, are they maxing that out? |
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Only a sick person would be hoping for something bad to happen here. View Quote View All Quotes View All Quotes Quoted:
Only a sick person would be hoping for something bad to happen here. Better? Attached File |
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Even with all the bashing, I think it's amazing how fast they have come up with plans, personnel, and equipment to mitigate the damage. Normally, it would take months to do the planning and actually get some work done.
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Looking at the latest pictures and video, I can't help but get one of those ominous feelings about the fact that I don't think anybody knows how deep of hole has been plunged into the earth at the midpoint of the main spillway where it's still intact and water falling into the side of the hill. Also the fact that now the other side of the broken part of the spillway is starting to show signs of a new stream of water along side it, I just keep waiting to watch the whole thing slide into the river in a massive landslide. I realize it's supposed to be on solid rock, but from our earlier discussions about the rotten rock at the E Spillway weir base, it makes me wonder how much water is getting injected by force into the fissures around that area. I hope it holds out, but what really concerns me is based on historical data, we haven't even begun to reach the part of the year where the dam REALLY fills up. That's several more months of pounding that part of the hill with water outflow of 20K to 100K per second. View Quote Just as a point of reference ........... !00,000 CF/S = 750,000 gallons/sec at 7.5 gallons per ft3 750,000 gallons * 8.33 lbs per gallon = 6,247,500 pounds of water every second. That's a shitload of water. Apologies if someone has already done this calculation. |
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Even with all the bashing, I think it's amazing how fast they have come up with plans, personnel, and equipment to mitigate the damage. Normally, it would take months to do the planning and actually get some work done. View Quote I honestly think that if they hadn't overflowed the emergency spillway, they'd still be fighting to get anything done. Once it got federal funding and federal emergency status, a lot of avenues were opened. |
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got some good weather intel from this morning, higher than avg snow levels are coming as I expected
1 inch of rain roughly equals 12 inches of snow, so that is 5-7 inches on top of a lot of snow pack along the crest Monday-Monday night appears to be the biggest day for us so far snow levels at 6500-7500 feet through most of this so a lot of rain falling on snowpack it still looks to be colder and a shorter duration than the last event so not nearly the rise in water levels we saw last time with the amount of water they are letting out I think they are gonna float this one just fine some perspective on snowpack from our local ski resorts all of this info comes from Lake tahoe area snow forecast, The Tahoe daily snow the forum kept my old avatar, score! |
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So about 30% of the General Discussion posters? Like the socialist and Marxist have made Trump into their monster allowing all things possibly bad to be said about him including his death the General Discussion have made the state and people of California the focus of their rage. It's been that way for twenty years here. View Quote Are you talking about all the media assholes, who love to report on how many have died, and shove microphones into peoples' faces and ask them things like "And how did you feel when you saw your husband and children swept away, Mrs. Whoozis?" Throw them all into the river. |
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I honestly think that if they hadn't overflowed the emergency spillway, they'd still be fighting to get anything done. Once it got federal funding and federal emergency status, a lot of View Quote View All Quotes View All Quotes Quoted:
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Even with all the bashing, I think it's amazing how fast they have come up with plans, personnel, and equipment to mitigate the damage. Normally, it would take months to do the planning and actually get some work done. I honestly think that if they hadn't overflowed the emergency spillway, they'd still be fighting to get anything done. Once it got federal funding and federal emergency status, a lot of FIFY |
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Just as a point of reference ........... !00,000 CF/S = 750,000 gallons/sec at 7.5 gallons per ft3 750,000 gallons * 8.33 lbs per gallon = 6,247,500 pounds of water every second. That's a shitload of water. Apologies if someone has already done this calculation. View Quote View All Quotes View All Quotes Quoted:
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Looking at the latest pictures and video, I can't help but get one of those ominous feelings about the fact that I don't think anybody knows how deep of hole has been plunged into the earth at the midpoint of the main spillway where it's still intact and water falling into the side of the hill. Also the fact that now the other side of the broken part of the spillway is starting to show signs of a new stream of water along side it, I just keep waiting to watch the whole thing slide into the river in a massive landslide. I realize it's supposed to be on solid rock, but from our earlier discussions about the rotten rock at the E Spillway weir base, it makes me wonder how much water is getting injected by force into the fissures around that area. I hope it holds out, but what really concerns me is based on historical data, we haven't even begun to reach the part of the year where the dam REALLY fills up. That's several more months of pounding that part of the hill with water outflow of 20K to 100K per second. Just as a point of reference ........... !00,000 CF/S = 750,000 gallons/sec at 7.5 gallons per ft3 750,000 gallons * 8.33 lbs per gallon = 6,247,500 pounds of water every second. That's a shitload of water. Apologies if someone has already done this calculation. I did the calculation a while back but didn't post it, thanks for putting it in print. You know, it really is hard to imagine 6.25 million pounds of water per second, it really puts into perspective the size of the gates and the engineering involved to create this dam, and the incredible forces that are being exerted upon the open hole and fissures in the rock holding the lower part of the spillway. I'm amazed it is holding together as well as it is right now, and why I still have that "ominous feeling" about it all. |
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I agree with the 'ominous feeling'.
This is far from over, that spillway is going to get a workout... |
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... while it's a lovely, drizzling day here in Arizona, I sure wish more of California's moist would make it across the desert to us View Quote Pretty easy to do. Start removing material from the tops of the mountains and use the rubble to fill San Francisco Bay. I saw today that the real issue in California is single payer health care and including illegal aliens in the deal. |
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I did the calculation a while back but didn't post it, thanks for putting it in print. You know, it really is hard to imagine 6.25 million pounds of water per second, it really puts into perspective the size of the gates and the engineering involved to create this dam, and the incredible forces that are being exerted upon the open hole and fissures in the rock holding the lower part of the spillway. I'm amazed it is holding together as well as it is right now, and why I still have that "ominous feeling" about it all. View Quote Yeah, 45,000,000 GPM is a whole bunch of water. I have pumps at my site that have 7KV motors, that volume is just incredible by comparison. |
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Failed To Load Title https://youtu.be/h384gT87WxI Current look at the status of the Emergency spillway area. Screen caps from above video. |
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Several short news stories have been linked in the thread about the 2009 River Valve Outlet System accident, but I haven't seen the actual OSHA report referenced.
Somehow the description of the overall safety culture seems familiar... with the current situation involving the -The energy dispersion ring was removed from the river valve system in April of 2009. This is a critical safety device in the operation of the river valves. It was not replaced. DWR stated (TB) that the ring was not replaced because DWR did not have the time with the up coming season.
-Department of Dam Safety was not consulted and did not approve the removal of the energy dispersion ring. When DWR makes any changes to the Dam they must get approval from this group and they did not get approval. No party, body, group or department reviewed, analyzed or inspected the river valve system to determine the hazards created by removal of the energy dispersion ring. - The employees in the River Valve Chamber during operation of the river valves have limited access as they are in the ventilation of the discharge volume exposed to air flow of over 100 mph. -DWR had not evidence of ever opening the river valves to 100% during the life of the system, but decided to operate them in this capacity without the energy dispersion ring. -Employees expressed safety concerns (see interview notes and recordings) with operation of the River Valves to 100% because this is not the way they systems was engineered or designed to be used. -Modeling studies done when dam was constructed and in 1993 by UC Davis (see file and dvd). Both concluded that the operation of the river valves in the tunnel should not be done or severely limited with out the energy dispersion ring. DWR was aware of these studies and had copies and a video of the actual test. The tests and studies and original engineered design were ignored and the operation of the river valves was approved. -The River Valve Chamber break-away wall was never inspected for integrity or safety for over 40 years. -The vacuum alarm on the break-away wall in the RVC Chamber was disconnected and not in operation when valves were operated and DWR stated they have never inspected or maintained this alarm. -The access was limited during the operation of the river valves. Employees could not escape the chamber due to the hurricane like winds. -Corroded bolts were identified that were intended to secure the break-away wall (23 failed before accident-corroded and no evidence of shearing). Also, foam sealant had been placed in the past by DWR employees around door to keep water out - foam was localed in area where bolts were corroded. This indicates knowledge of corrosion and failure of the bolts and seal of the door. -The cone valve is used in the tunnel which is confined and demands high amounts of air at high velocities during discharge. The American Society of Mechanical Engineers Hydro Power Technical Committee the Hydraulic Structures 3rd edition states that this type of valve (fixed-cone dispersion valve) should not be used or set to discharge into a confined space. View Quote |
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Several short news stories have been linked in the thread about the 2009 River Valve Outlet System accident, but I haven't seen the actual OSHA report referenced. Somehow the description of the overall safety culture seems familiar... with the current situation involving the View Quote View All Quotes View All Quotes Quoted:
Several short news stories have been linked in the thread about the 2009 River Valve Outlet System accident, but I haven't seen the actual OSHA report referenced. Somehow the description of the overall safety culture seems familiar... with the current situation involving the -The energy dispersion ring was removed from the river valve system in April of 2009. This is a critical safety device in the operation of the river valves. It was not replaced. DWR stated (TB) that the ring was not replaced because DWR did not have the time with the up coming season.
-Department of Dam Safety was not consulted and did not approve the removal of the energy dispersion ring. When DWR makes any changes to the Dam they must get approval from this group and they did not get approval. No party, body, group or department reviewed, analyzed or inspected the river valve system to determine the hazards created by removal of the energy dispersion ring. - The employees in the River Valve Chamber during operation of the river valves have limited access as they are in the ventilation of the discharge volume exposed to air flow of over 100 mph. -DWR had not evidence of ever opening the river valves to 100% during the life of the system, but decided to operate them in this capacity without the energy dispersion ring. -Employees expressed safety concerns (see interview notes and recordings) with operation of the River Valves to 100% because this is not the way they systems was engineered or designed to be used. -Modeling studies done when dam was constructed and in 1993 by UC Davis (see file and dvd). Both concluded that the operation of the river valves in the tunnel should not be done or severely limited with out the energy dispersion ring. DWR was aware of these studies and had copies and a video of the actual test. The tests and studies and original engineered design were ignored and the operation of the river valves was approved. -The River Valve Chamber break-away wall was never inspected for integrity or safety for over 40 years. -The vacuum alarm on the break-away wall in the RVC Chamber was disconnected and not in operation when valves were operated and DWR stated they have never inspected or maintained this alarm. -The access was limited during the operation of the river valves. Employees could not escape the chamber due to the hurricane like winds. -Corroded bolts were identified that were intended to secure the break-away wall (23 failed before accident-corroded and no evidence of shearing). Also, foam sealant had been placed in the past by DWR employees around door to keep water out - foam was localed in area where bolts were corroded. This indicates knowledge of corrosion and failure of the bolts and seal of the door. -The cone valve is used in the tunnel which is confined and demands high amounts of air at high velocities during discharge. The American Society of Mechanical Engineers Hydro Power Technical Committee the Hydraulic Structures 3rd edition states that this type of valve (fixed-cone dispersion valve) should not be used or set to discharge into a confined space. but don't worry, I'm sure that no one got fired or lost their pension, so it's all good. (/s) |
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From looking at the graphs on https://cdec.water.ca.gov/cgi-progs/queryF?s=ORO&d=18-Feb-2017+10:57&span=12hours
seems like after the last rainstorm there was a lag of about 3 days before the max inflow into the reservoir was observed(190k max ) so I guess it is raining now there? so would look for capacity issues(hopefully none) to begin 2/21ish. currently: 45k in and 69.6 out they have gotten 2 in of rain in the last 30ish hours per the site |
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View Quote Our newest addition to the fleet. Converted this 200 ton Navy crane into a bucket dredge. It has a 50cy bucket. Attached File |
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Video from Yesterday showing some highlights of the repairs.
Oroville Spillway February 17, 2017 https://youtu.be/IRyj0T9Rm4A adding screen caps to my Album now. |
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Even with all the bashing, I think it's amazing how fast they have come up with plans, personnel, and equipment to mitigate the damage. Normally, it would take months to do the planning and actually get some work done. View Quote Normally public works makes it all but impossible to do or move on anything. I dont care where you are in the US- well actually in the world, you can get whatever you want with piles of cash. All of whatever you need can be trucked, flown, barged into wherever you need it, once you authorize payment- in days. By a week ANYTHING can be started. Political will and cash. Thats all it takes. |
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Southern California right now! Attached File
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The spreasheet I posted shows about a 60 hour lag from start of rainfall to start of serious rise in reservoir. They have now decreased the spillway output to 65,000 ft³/sec aka 65kcfs which has me scratching my head a bit, unless they have the barge under it or something. Without onsite images I can't even guess why they are reducing it when the rain has been going on for 48 hours and continuing on for 2 more days... From the metabunk forum, I found this nice annotated guesstimated image to help when looking at "dry" photos of the same area: The white corner looks like their new "High Water Mark" on the side of the spillway control structure above the weir. View Quote 1. They are doing work down at the debris pile in the river. 2. They are getting close to lake level 850 and have to reduce flow to avoid eroding the channel inside the lake and sending debris through the gate house and down the spillway. |
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Southern California right now!https://www.AR15.Com/media/mediaFiles/318573/IMG-1254-149051.JPG View Quote That's one hell of a drought you have going on in Kali. |
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Lots of good information and answers to most questions in here.
I hope we don't see good people lose property or life over this, I do wish the bums who wasted the funds they had to do legit repairs years ago pay a steep price. I'm sure the politicians in the state are working 24/7 to come up with a way to ban any more water from entering the lake. it wouldn't surprise me one bit. |
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So about 30% of the General Discussion posters? Like the socialist and Marxist have made Trump into their monster allowing all things possibly bad to be said about him including his death the General Discussion have made the state and people of California the focus of their rage. It's been that way for twenty years here. View Quote View All Quotes View All Quotes Quoted:
Quoted:Only a sick person would be hoping for something bad to happen here. So about 30% of the General Discussion posters? Like the socialist and Marxist have made Trump into their monster allowing all things possibly bad to be said about him including his death the General Discussion have made the state and people of California the focus of their rage. It's been that way for twenty years here. I have no idea what you said. Why? Because I don't care. Why? Because of that's stupid, obnoxious color. |
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