# Relationship history for MSHA mine 4607491

Current hierarchy: **Alpha Metallurgical Resources Inc → Nicholas Contura LLC → Bishop Surface**

- 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:** Michael C  Faykus → Bishop Surface; 1986-02-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Prosperity Energy Inc → Bishop Surface; 1988-04-01 to 1990-08-14; source msha-controller-operator-history
- **controller_controls_operator:** Michael C  Faykus → Prosperity Energy Inc; 1988-04-01 to 1990-08-14; source msha-controller-operator-history
- **operator_operates_mine:** Patience Inc → Bishop Surface; 1990-08-15 to 2006-12-28; source msha-controller-operator-history
- **controller_controls_mine:** Tracy W  Hylton II → Bishop Surface; 1990-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tracy W  Hylton II → Patience Inc; 1990-08-15 to 2006-12-28; source msha-controller-operator-history
- **controller_controls_mine:** Douglas M  Epling et al → Bishop Surface; 2000-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hanover Resources LLC → Bishop Surface; 2006-12-29 to 2011-07-12; source msha-controller-operator-history
- **controller_controls_operator:** Douglas M  Epling et al → Hanover Resources LLC; 2006-12-29 to 2011-07-12; source msha-controller-operator-history
- **controller_controls_mine:** Jeffery A  Hoops → Bishop Surface; 2009-05-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Blackjewel L.L.C. → Bishop Surface; 2011-07-13 to 2019-09-25; source msha-controller-operator-history
- **controller_controls_operator:** Jeffery A  Hoops → Blackjewel L.L.C.; 2011-07-13 to 2019-09-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Metallurgical Resources Inc → Bishop Surface; 2016-07-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Nicholas Contura LLC → Bishop Surface; 2019-09-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Nicholas Contura LLC; 2019-09-26 to current/open; source msha-controller-operator-history