Main fans for all underground metal and nonmetal gassy mines must have pressure-recording systems. The fans are required to be examined daily while operating if persons are underground. The pressure-recording systems indicate whether the fans are in good operating condition. The pressure recordings are required to be kept one year.
The latest form for Main Fan Operation and Inspection (I-A, II-A, III, and V-A mines) expires 2022-07-31 and can be found here.
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Supporting Statement A |
Supplementary Document |
Federal Enterprise Architecture: Workforce Management - Worker Safety