David Dahle's photos with the keyword: NSP
Northern States Power - Minnehaha County, SD
24 Mar 2025 |
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I just liked the design of the angle pole on this old transmission line (its voltage has long since been lowered to repurpose it for distribution service).
The leaning pole serves as a 'push brace' to offset the strain of the conductors as it makes a slight turn along the interchange. Push braces used to be a common construction technique, but today, a guy wire on the other side of the pole is preferred. That said, push braces are still used where a guy wire will not work due to the location.
(As for the fire trucks, there is a fire protection equipment dealer just to the right)
Northern States Power - Raymond, MN
23 Aug 2020 |
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The old transformer pole at Raymond still stands, along with its crossarm-mounted bank (I'd bet the three cans are GE units).
Northern States Power - Turner County, SD
01 Sep 2021 |
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The 'Rosefield' 23.9kV / 7200V substation in the sunset of its life.
It was replaced by a pole-mounted stepdown in 2021.
Northern States Power - Rockville, MN
27 Sep 2019 |
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A close view of the ancient GE fluted can. Definitely a museum piece!
I strongly suspect it's the same style as the one Mike Parker photographed many decades ago: www.ipernity.com/doc/ndlinegeek/48627488
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