Took some cool pics of Fordyce Lake Dam today

Chopperman · 07-31-2006, 12:35 AM

Shot of the outlet from on top of the dam

Pic from the center of the dam looking onto the lake

Pic of the over flow gates

I decided to hike down to the outlet and check it out. That shiat was LOUD, kind of like a jet dragster. This pic is shot from about 10-15 feet from the jet stream.

Close up of the exhaust nozzle. CRAZY

Richard · 07-31-2006, 12:38 AM

nice pics , do you have any larger ones

Chopperman · 07-31-2006, 12:40 AM

Quote:

Originally Posted by Richard

nice pics , do you have any larger ones

They show up fine on my monitor 400 x 300 pic size

Richard · 07-31-2006, 12:49 AM

Quote:

Originally Posted by Chopperman

They show up fine on my monitor 400 x 300 pic size

I meant more like 1024x768

you pics make good wallpaper

AthlonAJ · 07-31-2006, 03:45 AM

Damn that last one is cool. Wonder how much pressure that is?

indulf · 07-31-2006, 08:09 AM

california is a beautiful place. nice pics

SanDiegoCJ · 07-31-2006, 09:04 AM

Quote:

Originally Posted by indulf

california is a beautiful place. nice pics

Yup, lots of beautiful country here.

Pooge · 07-31-2006, 09:09 AM

That water looks beautiful in that second picture :jealous:

SilverZuk · 07-31-2006, 09:16 AM

Quote:

Originally Posted by AthlonAJ

Damn that last one is cool. Wonder how much pressure that is?

How deep is the water (from water surface to outlet)?
For every 2.31 feet of water depth is 1 PSI.
23.1 feet = 10 PSI
231 feet = 100 PSI.

SilverZuk · 07-31-2006, 09:19 AM

Do they not have a hydro-electric turbine on the discharge?
If not, that is a huge waste of very cheap power, even though it is only intermittent.

Screwzer2 · 07-31-2006, 09:29 AM

Quote:

Originally Posted by SilverZuk

How deep is the water (from water surface to outlet)?
For every 2.31 feet of water depth is 1 PSI.
23.1 feet = 10 PSI
231 feet = 100 PSI.

No sh!t?

What do you suppose the pressure is of the Powerhouse near my place (Deer Creek Powerhouse). Here's approx. specs:

The water flows into the powerhouse from a 30" pipe from an up-stream forebay approx. 1000' higher than the powerhouse.

This 30" stream of water gets reduced to two 2" streams. (30" dia. down to two 2" dia. streams)

These in turn, blast against a couple of big-ass Pelton wheels to drive two generators about 15-20' in diameter.

Shoots a stream about 100' long from each "bay" on the output side, before its picked up again in another series of pipes and flumes which provides (western) Nevada County with their drinking water. Truckee is on its own seperate system.

Chopperman · 08-01-2006, 12:25 AM

pic of my junk going through the cut out

ScottFJ40 · 08-01-2006, 05:43 AM

Quote:

Originally Posted by AthlonAJ

Damn that last one is cool. Wonder how much pressure that is?

Agreed, tat's way cool, nice pics.

Mustard Dog · 08-01-2006, 05:54 AM

I'd be more impressed if you posted a pic of you putting your hand in the flow from the nozzle

SilverZuk · 08-01-2006, 07:03 AM

Quote:

Originally Posted by Screwzer2

The water flows into the powerhouse from a 30" pipe from an up-stream forebay approx. 1000' higher than the powerhouse.

This 30" stream of water gets reduced to two 2" streams. (30" dia. down to two 2" dia. streams)

These in turn, blast against a couple of big-ass Pelton wheels to drive two generators about 15-20' in diameter.

Shoots a stream about 100' long from each "bay" on the output side, before its picked up again in another series of pipes and flumes which provides (western) Nevada County with their drinking water. Truckee is on its own seperate system.

If the elevation difference between the surface of the lake and the discharge is 1000 feet, then the pressure is 432.9 PSI static. It will actually be less because friction losses in the piping.

If you have a water storage tank with an elevation of 1000, and have a 1000 miles of pipe that goes to 0' elevation, the static pressure will be 432.9 PSI. Doesn't matter if it is a large lake or a 3/4" pipe full of water, static pressure is simply elevation.

Pipe sizes and volume don't mean a thing to static pressure. The 30" reducing to a 2" doesn't increase the pressure either, all it does it cause proportion pressure loss based on the velocity of the water in the pipe and the diameter of the pipe.

So you start with 432.9 PSI, but as soon as the water starts moving pressure is lost due to friction. The pressure loss through the 30" is minimal because the larger diameter. The pressure loss through the 2" is tremendous.
In that case, they are using the 2" as an orfice plate (restrictor plate) to limit the flow.

Turboduck01 · 08-01-2006, 09:41 AM

If the dam is 1000 ft high, that water is coming out at 173 mph based on Velocity = sqrt (2*gravity*height)

that's definitely worth of sticking your hand out in front of it and telling us about it

07-31-2006, 12:35 AM	#1
Chopperman Cage Fighter Join Date: Dec 2000 Member # 2634 Location: Rocklin, Ca Posts: 3,428	Took some cool pics of Fordyce Lake Dam today Shot of the outlet from on top of the dam Pic from the center of the dam looking onto the lake Pic of the over flow gates I decided to hike down to the outlet and check it out. That shiat was LOUD, kind of like a jet dragster. This pic is shot from about 10-15 feet from the jet stream. Close up of the exhaust nozzle. CRAZY Attached Images __________________ <><

07-31-2006, 12:38 AM	#2
Richard Book em Dano Join Date: Feb 2000 Member # 233 Location: Marion and Polk County , Oregon Posts: 11,039 Blog Entries: 1	nice pics , do you have any larger ones __________________ The Weather Is Here , Wish You Were Beautiful

07-31-2006, 03:45 AM	#5
AthlonAJ Granite Guru Join Date: Mar 2002 Member # 10462 Location: Iowa Posts: 836	Damn that last one is cool. Wonder how much pressure that is? __________________ www.AJ's Offroad Armor.com

07-31-2006, 08:09 AM	#6
indulf Registered User Join Date: Jul 2001 Member # 6156 Location: Georgia Bounty Runners Posts: 1,160	california is a beautiful place. nice pics __________________ "whatever doesn't kill me postpones the inevitable" 92 xj in the works, '10 mazdaspeed 3

07-31-2006, 09:09 AM	#8
Pooge Registered User Join Date: Apr 2004 Member # 30019 Location: Walpole, NH Posts: 131	That water looks beautiful in that second picture :jealous: __________________ [COLOR="Red"]"Your kids have all touched me, and I'm pretty sure that I've touched them."[/COLOR] -94.5 PSD - Daily beater -94 Impala SS - Old man pimp-mobile

07-31-2006, 09:19 AM	#10
SilverZuk Hillbilly Houndsman Join Date: Aug 2002 Member # 13420 Location: Kenna, West Virginia Posts: 4,268	Do they not have a hydro-electric turbine on the discharge? If not, that is a huge waste of very cheap power, even though it is only intermittent. __________________ Help Zach fight lukemia http://www.zachgyost.com/main/page_fundraisers.html www.MountaineerOffroad.com

08-01-2006, 12:25 AM	#12
Chopperman Cage Fighter Join Date: Dec 2000 Member # 2634 Location: Rocklin, Ca Posts: 3,428	pic of my junk going through the cut out Attached Images __________________ <><

08-01-2006, 05:54 AM	#14
Mustard Dog Chubby Chaser Join Date: Oct 2001 Member # 7889 Location: 330 feet closer to the Hammers than desertoy Posts: 11,363	I'd be more impressed if you posted a pic of you putting your hand in the flow from the nozzle __________________ Eric Anderson TIN BENDERS Hendrix X Chassis #013 Spotter F-Toy #028 Team Marlin Crawler KOH #66 4Wheel Parts, Raceline, Bilstein, Marlin Crawler, LightFORCE, BFG, HendriX, 12voltguy, Longfield Roxy's in the industry and I'm a sponsored professional driver. The two of us together make a powerhouse.

08-01-2006, 09:41 AM	#16
Turboduck01 Registered User Join Date: Oct 2005 Member # 56573 Posts: 3	If the dam is 1000 ft high, that water is coming out at 173 mph based on Velocity = sqrt (2gravityheight) that's definitely worth of sticking your hand out in front of it and telling us about it Last edited by Turboduck01; 08-01-2006 at 09:48 AM.

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