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This map shows an overview of the fiber optic cable between East Wenatchee and Rock Island Dam.

EAST WENATCHEE — Intermountain Infrastructure Group (IIG) wants to submerge a 1-inch, 75,000-foot-long fiber optic cable in the Columbia River — from East Wenatchee to Rock Island Dam — to connect Microsoft’s data centers in the Wenatchee Valley, according to documents.

The 466-page application for a “shoreline substantial development permit for a regional submerged fiber optic line” was submitted to Douglas County Transportation and Land Services Sept. 9, and posted on the agency’s website.

Emily Thornton: (509) 861-2174 or

on Twitter @EmilyK_Thornton

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