# Relationship history for MSHA mine 1518442

Current hierarchy: **Charles  Collins → JRC Mining, Inc. → Salem Auger No. 54**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** G B  Hendrickson → Salem Auger No. 54; 1986-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & H Coal Co Inc → Salem Auger No. 54; 2001-09-01 to 2021-03-25; source msha-controller-operator-history
- **controller_controls_operator:** G B  Hendrickson → B & H Coal Co Inc; 2001-09-01 to 2021-03-25; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Collins → Salem Auger No. 54; 2013-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William K  Abraham → Salem Auger No. 54; 2019-10-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Virgie Clean Mining, LLC → Salem Auger No. 54; 2021-03-26 to 2022-07-06; source msha-controller-operator-history
- **controller_controls_operator:** William K  Abraham → Virgie Clean Mining, LLC; 2021-03-26 to 2022-07-06; source msha-controller-operator-history
- **operator_operates_mine:** JRC Mining, Inc. → Salem Auger No. 54; 2022-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Collins → JRC Mining, Inc.; 2022-07-07 to current/open; source msha-controller-operator-history