David Dahle

David Dahle

Posted on 05/22/2013


Photo taken on May 26, 2011


See also...

The Powerline Graveyard The Powerline Graveyard



Keywords

41.6kV
38.1kV


Authorizations, license

Visible by: Everyone
All rights reserved

163 visits

Otter Tail Power - Bloom, ND

Otter Tail Power - Bloom, ND
Here's how Otter Tail originally built its transmission lines back when they ran 38.1kV on their system. About the same time they upped the lines to 41.6kV (increasing the phase to ground voltage from 22kV to 24kV) they switched to the present delta arrangement - likely inspired by Interstate Power's practice. This is the very last surviving line section with this arrangement and it is presently retired; I don't think the linemen want to take the line down until it HAS to come down for safety reasons.

The upper arm is 7' and the lower arm is 3' according to blueprints I have. A gain for the former distribution arm is visible, as is the long-gone shield wire on top.

Power Lines, Austin Taylor, Jesse Lor, Lewis Perkins and 3 other people have particularly liked this photo


Comments
Power Lines
Power Lines
I remember this line!

Do you know if there's any sections of it that have the origianl conductors or insulators?
4 years ago.
David Dahle has replied to Power Lines
I'll have to check as to when the line was redone with heavier conductor, but this was along the backbone alignment between Fergus Falls, MN (Hoot Lake) and the big plant at Washburn, ND. Seems this stretch got posts around the 1950s or so. As far as I know, it was the last stretch near Underwood that still had multiparts from the 1940s (when the tie to the western end of the Central L&P system was put back) until the rebuild in the early 1980s.
4 years ago.
David Dahle
David Dahle
The line has been reworked into a 12.5kV open Y line. The old static wire extension was lopped off and the 3' arm was replaced with a neutral bracket.
5 months ago.
Power Lines
Power Lines
At least the pole is still there, but it is a shame that the little arm is gone!
5 months ago.