South Ops Weather-2023

Happy New Year 2023

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Highway 168(4lanes) is shutdown between tollhouse and Lodge due to a rock slide.

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SoCal Rainfall totals

https://forecast.weather.gov/product.php?site=SGX&issuedby=SGX&product=RRM&format=txt&version=1&glossary=0

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They nailed this one. https://www.weather.gov/lox/fwmV3?state=CA

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California flooding: L.A. dams at risk of overflowing - Los Angeles Times (latimes.com)

"Now that the shock of a series of January storms has worn off, Los Angeles County officials face a herculean chore: Five reservoirs along south-facing San Gabriel Mountain slopes are filled with so much debris and soupy mud that they pose a flood risk to the communities below.

Another intense storm, they say, could unleash new surges of dirt, toppled trees and boulders down canyons stripped of their binding vegetation by the 2020 Bobcat fire, sending chocolate-colored floodwaters over the dams and into the cities of Arcadia, Sierra Madre, Pacoima, Sun Valley and Sunland.

An urgent concern is emptying the reservoir behind 96-year-old Santa Anita Dam of about 600,000 cubic yards of muck more than 80 feet deep. Two of the three valves that control releases of stormwater from the 20-story-tall dam are blocked with silt."

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HEQ Represent
Excavating bottom of dam’s debris field (with a Menzi Muck “walking/spider” Excavator)
(4) Excavating bottom of dam’s debris field - YouTube

An interesting thing about these excavators is that they can be disassembled into components, lifted by long-line, and reassembled at sites without road access.

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Can’t do it when the dam is already full.

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600k yards, 80 ft deep. The objective is to clear two valves. The valves are in a group about half to two thirds down the deepest part of the ravine v-shape. Its twisty on both sides, the water has cut a winding fall, eh? Where do you put the muck to drill straight down to the valve cluster and let gravity do the heavy lifting, as it were, to drain? How much volume of tacky dirt will remain after the liquid water empties. Compacted down to something manageable with HEQ? I saw a Eurocopter (Tiny Bubbles Aviation) touring the dam sites. It’s everybody’s problem. ANF, CalFire, LA County, Parks, Water and Power, the list of stakeholders is very long and keenly interested.

It will be a big job. I hope to see some video.

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