| Date Filed | Summary | Pages |
| 06/14/2023 | Service Notice. | 3 |
| 06/14/2023 | Staff Report of Investigation electronically filed by Mr. Jess Stottsberry on behalf of Staff of OPSB. | 6 |
| 05/30/2023 | Response to First Set of Data Requests from Staff electronically filed by Ms. Devan K. Flahive on behalf of American Transmission Systems Incorporated. | 4 |
| 05/25/2023 | Notice of Proof of Payment for Expedited Review filed by Michael A. DeSarro on behalf of American Transmission Systems, Inc. | 4 |
| 05/23/2023 | Construction Notice Highland-Magellan No. 1 138kV Transmission Line Structure Replacement Project electronically filed by Ms. Devan K. Flahive on behalf of American Transmission Systems Incorporated. | 34 |
| 05/16/2023 | In the Matter of the Pre-Application Notification Letter for the Highland-Magellan No. 1 138kV Transmission Line Structure Replacement Project electronically filed by Ms. Devan K. Flahive on behalf of American Transmission Systems Incorporated. | 2 |