David Dahle

David Dahle

Posted on 05/26/2013


Photo taken on May 23, 2013


See also...

The Powerline Graveyard The Powerline Graveyard



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12.5kV
115kV
41.6kV


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Montana-Dakota Utilities - Bismarck, ND

Montana-Dakota Utilities - Bismarck, ND
Oh no.

Looks like MDU has it in mind to get rid of the 41.6kV system in Bismarck. One other 41.6/12.5kV sub bit the dust last year and looks like this one is next. :( They already got rid of a double circuit 12.5kV segment just north of the old sub (combining the two into one).

The old 41.6kV sub is on the left, the new 115/12.5kV sub is on the right. The pole with the single 115kV post is a cut-down remnant of the pole that used to be there and likely will disappear once the sub and 41.6kV branch go away.

Jesse Lor, André J.(Lineman80), Tony Glen have particularly liked this photo


6 comments - The latest ones
Power Lines
Power Lines
How does MDU build their 115kV transmission? Do they use the same armless style that Otter Tail does?
4 years ago.
David Dahle
David Dahle
There are 2 different specs in play for their 115kV lines:
Bulk transmission lines are always H-frame.
Subtransmission lines (like in this pic) are armless with huge 2-part horizontal line posts (recent replacements are polymer).
4 years ago.
Power Lines
Power Lines
I bet those posts must weigh a ton! CL&P's got a 115kV line built like that too. Also seen possible 230kV (or maybe 138kV; can't exactly rememner) lines from Delmarva Power with even bigger posts that are probably 5 or 6 feet long.
4 years ago.
David Dahle
David Dahle
Here's an older shot of this same sub from another view: www.ipernity.com/doc/ndlinegeek/18289011
4 years ago.
David Dahle
David Dahle
The 41.6kV sub is completely gone.
3 years ago.
Power Lines
Power Lines
That was a big substation back in its heyday. Sad to see it gone!
3 years ago.