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esummers
09-10-2008, 12:40 PM
I've been following this story over the past week on the Madison River below Quake and Hebgen Lakes. A major problem with the Dam could have a huge impact on the river below Quake Lake. The info below was taken from the Madison River Fishing Company in Ennis, Mt:

The news now is grim. The bulkhead plan did not work. There was to much turbulence at the dam intake for them to place the steel plate and stem the flow. At the moment there does not seem to be a “plan B”. The flow is still at springtime level. They are losing more than 5 inches of reservoir water elevation every 24 hours and this will accelerate as the level drops due to the cone shape nature of the reservoir bed. There are two scenarios that are scaring us at the moment.

First; they decide there is no other choice but to drain the lake to fix the dam. Second; they cannot get a handle on the flows and the lake drains either completely or to the point that it will take years to refill. Either way the outcome has the potential to be tragic.

At the moment, despite rumors to the contrary, there are no plans to drain the reservoir. This is and will remain a “last resort” option.

I’m sure PP&L is frantic. The potential for a huge PR nightmare is every large company’s worst fear. This situation has that potential. If they drain that lake it could effectively kill this river for years. It would be an environmental disaster of enormous magnitude effecting not only the Madison Valley but the whole state of Montana and far beyond.

As of this update they are trying to get a dive boat on-sight to place a sonar device and possibly a camera down to the level where they can see and assess the structural integrity of the outer surface of the intake structure. If they determine that the structure is sound they will then have more options to put in place a stop-gap of some sort to stem the flow. They will then be able to assess the damage to the intake gates themselves and hopefully come up with a solution that does not involve draining the reservoir.

I’m not sure who PP&L has working on the problem but there has to be someone, somewhere in the country who is familiar with handling situations like this. Time to start lighting some fires. Please, take a minute and contact these folks:

Governor Brian D. Schweitzer Office of the Governor Montana State Capitol Bldg. P.O. Box 200801 Helena MT 59620-0801 (406) 444-3111, FAX (406) 444-5529 http://governor.mt.gov/contact/commentsform.asp

Jeff Hagener-Director Montana Fish, Wildlife and Parks http://fwp.mt.gov/contact/direct.aspx?id=2057080

Montana Dept of Natural Resources http://www.dnrc.mt.gov/About_Us/Contact_Us.asp

Phil Synhorst
09-10-2008, 05:22 PM
Esummers, I'm not sure if you are local out there, or here watching from afar. But, there is a company called Plug It Products that may have a solution, www.plugitproducts.com. They have a plant here in Lodi, CA, and a few more around the country. They usually deal with sewer pipes and that sort of thing, but they do come up with "emergency" designs when needed.

Hope this is of some help, Phil

Hairstacker
09-11-2008, 11:08 AM
It's a fascinating situation, albeit a deadly serious and potentially monumentally tragic one at that. Sure hope they figure this thing out quick, as the clock is running and winter's just around the corner.

esummers
09-11-2008, 09:58 PM
I live in Sacramento, but visit this portion of the Madison every year. This is the current response from PP&L in Montana regarding the dam situation:

SEPTEMBER 8, 2008
Contact: David Hoffman, 406-431-6783
mdhoffman@pplweb.com

PPL Montana continues effort to reduce water flow past Hebgen Dam

Engineers from PPL Montana continue to work on ways to reduce the flow of water past the Hebgen Dam after damage to the dam’s intake structure allowed water flows in the Madison River to increase to spring runoff levels.

The dam remains safe and stable, according to on-site monitoring equipment, and the river banks are containing the water flow.

A plan to install a specially fabricated steel bulkhead to reduce the flow was halted over the weekend after water pressure and turbulence from the flowing water made it impossible to install guides that would have held the bulkhead in place.

“We are considering several other options to reduce the water flow,” said Brad Spencer, vice president and chief operating officer of PPL Montana. “With the dam stable and the flow contained in the riverbanks, we are able to work deliberately and cautiously to ensure the safety of the public and of everyone involved.

“We appreciate the public’s patience as we work to solve this situation,” Spencer said. “We understand the inconvenience this has caused to people who use the river and the lake for recreational activities, and we’re doing everything we can to resolve it as soon as possible.”

PPL Montana has brought in experts in heavy construction and engineering to consult on ways to reduce the flow of water. The company has been keeping local officials informed since the damage was discovered Aug. 31.

The dam creates Hebgen Lake, a reservoir just north of the Idaho border that stores water for the Madison-Missouri river system, where there are eight PPL Montana hydroelectric dams.

PPL Montana operates coal-fired power plants at Colstrip and Billings and 11 hydroelectric plants along West Rosebud Creek and the Missouri, Madison, Clark Fork and Flathead rivers. It has a combined generating capacity of more than 1,200 megawatts and has offices in Billings, Butte and Helena. PPL Montana is a subsidiary of PPL Corporation (NYSE: PPL).




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