Scheduled Outage:

Title: Shutdown West Arc Bldgs. 40 & 45
Type: Power Network Telephone Road HVAC Water Gas Controls Other
Status: Proposed Confirmed Cancelled Completed
Proposed by: Howard Dunlap E-Mail: dunlap@jlab.org
Start Time: 09/17/2026 06:30 End Time: 09/17/2026 11:30
Description and Impacts: FMO-E will be performing extensive 5-year electrical preventive maintenance on panelboards, switchgear, and disconnects throughout the West Arc Service Buildings, including B.45 and B.40.
Emergency power will remain available and will not be affected.
This maintenance activity is expected to take approximately 5 hours. Please refer to ATLIS-121427 and attached panel schedules plus system information for specific impact details.
During this work, the West Arc section of the Accelerator Tunnel will operate on emergency lighting only.

Affected Areas:

Bldg 40: West Arc Service
Bldg 45: West Arc Service


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