# Relationship history for MSHA mine 1517871

Current hierarchy: **Matthew T Orr → Orr Auger Mining, LLC → OAM#40**

- 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:** Laird T  Orr Jr. → OAM#40; 1978-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Green Hill Mining Inc → OAM#40; 1996-11-01 to 2018-01-17; source msha-controller-operator-history
- **controller_controls_operator:** Laird T  Orr Jr. → Green Hill Mining Inc; 1996-11-01 to 2018-01-17; source msha-controller-operator-history
- **controller_controls_mine:** Lori  Deaton-Orr et al → OAM#40; 2014-06-10 to 2017-12-13; source msha-controller-operator-history
- **controller_controls_mine:** Matthew T Orr → OAM#40; 2017-12-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Orr Auger Mining, LLC → OAM#40; 2018-01-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lori  Deaton-Orr et al → Orr Auger Mining, LLC; 2018-01-18 to 2017-12-13; source msha-controller-operator-history
- **controller_controls_operator:** Matthew  Orr et al → Orr Auger Mining, LLC; 2018-01-18 to 2017-12-13; source msha-controller-operator-history
- **controller_controls_operator:** Matthew T Orr → Orr Auger Mining, LLC; 2018-01-18 to current/open; source msha-controller-operator-history