A power boom in eastern South Dakota raises questions about what comes next

By: Brad Johnson

Outlets: South Dakota Searchlight

Published: September 30, 2026

Words: 879

Last Updated: 4 days, 1 hour ago

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Eastern South Dakota could soon host the largest transmission project in the state’s history. South Dakota’s first 765-kilovolt line would run through Grant, Deuel and Brookings counties.

The larger story is what could follow it.

South Dakota’s largest existing transmission lines operate at 345 kilovolts. The proposed 765-kilovolt line is the electrical equivalent of replacing a rural highway with a six-lane interstate.

One line this large can move …

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