# Relationship history for MSHA mine 1518644

Current hierarchy: **William K  Abraham → Virgie Clean Mining, LLC → Salem Auger No. 28**

- 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. 28; 1986-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & H Coal Co Inc → Salem Auger No. 28; 2003-07-08 to 2018-08-14; source msha-controller-operator-history
- **controller_controls_operator:** G B  Hendrickson → B & H Coal Co Inc; 2003-07-08 to 2018-08-14; source msha-controller-operator-history
- **controller_controls_mine:** James W  Smith et al → Salem Auger No. 28; 2012-12-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Paul  Wilburn → Salem Auger No. 28; 2013-06-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Long Hole Auger, Inc. → Salem Auger No. 28; 2018-08-15 to 2020-09-30; source msha-controller-operator-history
- **controller_controls_mine:** David  Leischman → Salem Auger No. 28; 2018-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Leischman → Long Hole Auger, Inc.; 2018-08-15 to 2020-09-30; source msha-controller-operator-history
- **controller_controls_mine:** William K  Abraham → Salem Auger No. 28; 2019-10-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wilburn and Sons → Salem Auger No. 28; 2020-10-01 to 2020-10-28; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Wilburn → Wilburn and Sons; 2020-10-01 to 2020-10-28; source msha-controller-operator-history
- **operator_operates_mine:** Genesis Group, LLC → Salem Auger No. 28; 2020-10-29 to 2021-04-21; source msha-controller-operator-history
- **controller_controls_operator:** James W  Smith et al → Genesis Group, LLC; 2020-10-29 to 2021-04-21; source msha-controller-operator-history
- **controller_controls_operator:** Martha J  Smith et al → Genesis Group, LLC; 2020-10-29 to 2021-04-21; source msha-controller-operator-history
- **operator_operates_mine:** Virgie Clean Mining, LLC → Salem Auger No. 28; 2021-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William K  Abraham → Virgie Clean Mining, LLC; 2021-04-22 to current/open; source msha-controller-operator-history