David Dahle

David Dahle

Posted on 12/06/2013


Photo taken on April 14, 2013


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69kV
34.5kV


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Northern States Power - Sioux Falls, SD

Northern States Power - Sioux Falls, SD
Another pic from the ice storm this past April - this after the ice had all melted off.

Looks like all that galloping shook the one string loose! The end of the arm is actually broken out too. I have a feeling this 69kV line is Graveyard-bound soon anyway because all they did was take down the string - I believe they simply left the conductor shoe in place even.

The second circuit is a line that has been rebuilt twice in the last 20 years - first from 4160V to 13.8kV as part of the upgrades to eliminate the 4160V system in this part of town then they repurposed 4 blocks of this circuit to extend a 34.5kV circuit into the industrial park.

My house is powered from a 7970V circuit on a step-down can on this circuit - in the immediate aftermath of the ice storm, that 34.5kV circuit had a LOT of problems staying energized until all the problems were found and fixed while the rest of the neighborhood around me NEVER lost power apart from individual residences that had the service ripped off the back of the house from falling branches.

Xcel eventually fixed this pole: www.ipernity.com/doc/ndlinegeek/29027173 but it's obviously a temporary fix as this section is likely to be cut off by an impending 115kV conversion project.

Sean Kinnier, David Hinton, Hungry4Power, Tony Glen and 3 other people have particularly liked this photo


7 comments - The latest ones
A. R. Hudson
A. R. Hudson
I've always had a tough time with power outages as well. My house is served off of a short 13200V multigrounded single-phase line which runs for 4 spans, mostly in the woods on short poles which were set in 1959. Due to the line running through woods, it of course has experienced plenty of tree-related issues in the past 20 years that I've been here. I keep a generator at the ready as just one wind storm can take that crappy singlephase line out in a matter of seconds.

Now of course, I live less than 1000 feet from the main 13200/23000V trunk line, which went up back in 1997. All new poles, Hendrix visetops, and jacketed wire. None of my neighbors hardly ever have power outages since their transformers are just directly tapped off of that line.
10 months ago.
Tony Glen
Tony Glen
69kV down to 34.5kV? I think that's kinda dumb.
10 months ago.
David Dahle has replied to Tony Glen
The upper line has always been 69kV. The lower arm was 4160V then 13.8kV and now 34.5kV.

There is another section of the 69kV system that has indeed been taken down to 34.5kV - it was so that the downgraded 69kV line (replaced by a new 115kV line) could serve the 34.5kV distribution system.
10 months ago.
David Dahle
David Dahle
Correction: Xcel eventually DID return and replace the failed arm. Both lower left strings are now glass!
10 months ago.
A. R. Hudson
A. R. Hudson
That'll be interesting to see! You got plans to return and get a picture?
10 months ago.
David Dahle has replied to A. R. Hudson
I have no excuse NOT to. It's 3 blocks north of my house.
10 months ago.
A. R. Hudson has replied to David Dahle
I guess at that distance you could even walk there and save on fuel!
10 months ago.