The new substation, the new High Island Substation will replace the existing Himex Substation, which will be de-energized during the transition. The new substation will increase the total capacity from 42 MVA to 75 MVA at the current Himex Substation. Entergy will also upgrade the existing transmission line from 68 kV to 138 kV. This project has been ongoing since March 2020 to construct the new High Island Substation and upgrade the existing transmission line to handle the new substation’s increased capacity. While most of the work has been done without service interruptions to customers, crews will need to de-energize the existing Himex Substation while we complete the work to safely transfer service over to the new High Island Substation.
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