Posted on 02/17/2017 7:12:52 PM PST by keat
comes with the storm due Monday and Tuesday, which could drop close to 5 inches of rain in the watershed above the dam in western Tuolumne County.
“We are required to open the spillway when Don Pedro is at 830 elevation,” the spokesman said Friday. “With the current forecast, it shows it will be reaching 830 feet.”
McMillan was not certain what day the spillway gate would be opened, but more likely Tuesday. It would be the second time Don Pedro’s spillway has been activated in the history of the dam, which opened in 1971. “It is important to note the forecast is fluctuating hourly,” McMillan said.
TID officials notified officials with Stanislaus County Office of Emergency Services on Friday afternoon after running numbers on the weather forecast and potential runoff. Letting water run through the spillway protects the dam from serious damage.
Officials will start notifying residents in low-lying areas along the Tuolumne River in Modesto of the threat of flooding. Notifications will be made in the airport neighborhood, west Modesto and the Ninth Street area, said Sgt. Anthony Bejaran of the Sheriff’s Department.
The TID believes the water flow through the spillway will be less than the torrent in 1997, which caused massive flooding and destruction in Stanislaus and San Joaquin counties. The storms in 1997 were far heavier and warmer, melting a large amount of the Sierra snowpack, McMillan said.
The irrigation district, the co-owner of Don Pedro, will monitor the situation daily and provide updates. The district has to follow flood control protocols of the U.S. Army Corps of Engineers.
With the reservoir 98-percent full, TID officials were confident of making it through the current storm, but focused their concern on a heavier storm after a break Sunday.
(Excerpt) Read more at modbee.com ...
Lake Don Pedro...
Mosul Dam. The standard outlet is plugged with debris, and the spillway gate is hopelessly jammed. Last I heard it had about a year to expected failure; that news was about a year ago. There’s a million or so people downstream with no hope of evacuation when it breaches. Worth looking up.
Seven, seven, seven, seven...
We must have gotten several inches in a couple of hours today it was nuts - still raining its been raining since 5:30 this morning - torrential deluge for about six hours.
We sure got doused here in the South Bay / Peninsula area the last 12 hours. It was coming down nonstop for hours. Normally we get short squeals blowing through, not the steady drenching.
The lake is beyond full! What’s funny is I was reading this thread while you pinged me.
The construction of FCD#3 took 112 days from ground breaking to the dedication. It required a work force of 384 slaves, 34 slave drivers, 12 engineers, 2 turtle doves, and a partridge in a pear tree. The work was managed by a command team composed of 2345 bureaucrats, 2347 secretaries (at least two of whom can type), 12,256 paper shufflers, 52,469 rubber stampers, 245,193 red tape processors, and nearly one million dead trees.
Someone out there will know where this came from.. ;-)
Mosul dam was built on soft and porous rock. Hydraulic pressure forces water through the limestone? dissolving a bit over time. Have been treating the symptoms with grouting since it was built, until ISIS gained control of the area, and maintenance ceased.
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