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From the 1974 Storage Facilities report, page 67: Regional Geology and Seismicity Oroville Dam lies in the foothills on the western slope of the Sierra Nevada, a westerly tilted fault block with a core of granitic rock. A series of tightly folded, steeply dipping, metamorphic rocks overlies the...

there are no claims to that effect that I am aware of, there are questions as to the level of understanding they had given the best information they had at the time. you need to allow for the possibility they made calls that science and engineering have since deemed to be not the best solution...

I also am of the opinion, backed by some information I have looked into on mining gold in the sierras, that hydrothermal intrusions LONG AFTER the initial seafloor vents are possible in the dam ridgelines as they are present in the surrounding area. Created by the volcanism that is responsible...

Here is the diagram of the structure from the DWR Facilities report It shows the bridge is on the same structure as the gates and most importantly the 'Hoist Deck' the services the gates maintanence is next to it and just above it using the same vertical supports. I am not an expert but it...

Well, I for one had concerns about the geology that were alleviated. No debunking was needed as I was not overdramatically coming to conclusions without help finding evidence. It was not debunking but it was dispelling a bit of rumor and suspicion for me. I live in Northern California in the...

I am of two minds on this, on one hand I do not like the idea of censorship, especially on public projects. On the other, I did some design work on construction site wireless headset communications a few years ago and learned about all the safety rules for focus and attention among other...

Actually dont be so hasty, Scott Gates was able to pull something out of that image. He pointed out the grade at the emergency weir matches the concept art with the expanded gates. I went to college for design of physical products, most of my work was around green energy and consumer...

I have some doubts about the gatehouse for this much water noticing a few trucks and rocks. Not sure, interesting point worth considering, but I imagine that structure is not just solid but 1950's atomic bomb proof.

Unless your building helicopters in Kerbal Space Program, then you want to do all the dangerous stupid things!

As a Californian that has has seen a home leveled and felt the heat of an out of control fire, THANK YOU FOR YOUR SERVICE!!! I agree with your assessment, just wondering what the actual administrative burden is of using aerial construction. How much risk assessment is changed, how much DWR...

Good question, there's a whole thread dedicated to it https://www.metabunk.org/oroville-dam-drains-in-the-spillway-walls-how-do-they-work.t8407/

The use of helicopters to me indicates they are in full speed ahead every method possible frame of mind. It is risky to run helicopters over ground crews. It is very risky to fly helicopters below the altitude they can safely initiate an autorotation maneuver if they lose power (though the...

Found the Feather River inflow to lake Oroville reconstructed historical flow web page. Gives modeled data to 900 ad. http://www.treeflow.info/content/feather-river-inflow-oroville-reservoir-ca Figure 3. Reconstructed annual flow for the Feather River flow (901-1977) is shown in blue...

Good point. The climate is dry with extremely wet years partially due to the El Nino cycle in the Pacific Ocean. Averages of years above the historical average including tree ring modeling to go back to 1000ad would be nice. I found a PDF with the Sacramento river modeled to 900ad, looking...

Edit: I was wrong, AlmostCE and Bfahome got it right. See the post below.

The issue there is if the original intent was held, I think both Scott and I actually agree on that. the original design was for an epic flood that made downstream erosion a non factor. the numbers of CFS for the use of the 'emergency' weir are staggering, the numbers of CFS used in this...

And the documents, both the original report and all geologic surveys, show the sheeted dyke system is interlaced with shear zones and weak areas.

Well as I said I believe the photos of the existing cut are evidence that is not the case. We can agree to disagree, I agree to that.

I have wondered such things but in reality it could equally have been the job of an up and coming young engineer with a lot of talent that did not get as much input as would have liked on the main dam, and did the job on the emergency spillway far better than average. There is just no way to...

I am very interested if lidar can be tuned to ignore the falling water and capture only the deepest returns, also if the spectrum of return off the rock types versus suspended water is varied enough to tune for that as well. I suspect LIDAR could do something here, but if it has not been...