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The powerhouse, known as Kern River 1 (KR1), isn fed by the natural flow of the river.
In a letter to FERC dated Nov. 1, 2013, Edison states the retaining wall above the access opening (which it described as a "kneewall," which is typically very short, under three feet) will be replaced by a wedge shaped concrete wall to deflect water and debris around the access opening.
There an access opening that used to get into the KR1 tunnel for maintenance a few hundred yards east of the forebay.
In its March 12, 2014, letter back to Edison, FERC sums up that: "The cause of the overflow incident is the failure of the retaining wall ." above the access opening, which set everything else in motion.
There is an emergency spill pipeline at the forebay that should have moved that flood water and debris safely down to the river. But the opening was covered by a grate that became plugged.
a few miles east of the mouth of the canyon.
one asked me.
The commission has ordered Edison to file a lengthy report on how it will prevent a similar failure in the future. The letter also changed the hazard rating of the project from "low" to "significant," which will mean increased inspections by FERC.
Anyhow, on the night of August 19 the heavy rains created flash floods that charged down the sides of the canyon.
It took Caltrans 10 days to get the road fully open again, at a cost of more than $500,000.
At this point, many of you are probably wondering how a powerhouse in the river could Rolex Submariner No Date Nato
The whole system is gravity fed, no pumping. And, by the by, it was all constructed back in 1906 (they didn even have an app for that back then!). Fascinating.
Rock, mud and debris skittered down the canyon walls and closed the highway in at least two places near the Southern California Edison power plant Rolex Datejust Ii Black Arabic
A landslide crashed through a retaining wall above the access point and busted it open before continuing down to cover Highway 178.
The water that makes the power comes from behind Democrat Dam, 14 miles upriver from KR1.
A low rating means a project would have essentially no impact were it to fail. Significant means it might have impacts to structures or some environmental impact. A rating of "high" indicates a probable loss of life should the project fail.
be the cause of a landslide from hundreds of feet above.
It pretty interesting actually.
The power plant was shut down after the incident and only recently came back online in late February. Forest Service to come up with a plan to stabilize the badly eroded hillside.
Mother Nature got help shutting down Hwy 178
While there has been no independent investigation of the landslides, a letter from the Federal Energy Regulatory Commission (FERC) sent to Edison earlier this month clearly pins the cause of at least one of the two slides on faulty Edison facilities, specifically a retaining wall.
Oh, and having a grate over the mouth of the emergency spill pipeline probably wasn a good idea either and will be corrected, Edison also notes in its Nov. 1 letter.
Water from Democrat travels by tunnel and flume high along the south canyon wall to a "forebay" (essentially a regulating station) above KR1. From there, the water drops by pipeline down to the powerhouse where it spins the turbines and gets dumped back into the river.
I not sure why the project Blue Prada Handbag wasn pegged at "high" since it was just pure luck that no one was driving on 178 when the landslides happened. But no Rolex Submariner Gold
Water, rocks, mud and plant material rushed into the access opening and was carried to the forebay.
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