# Relationship history for MSHA mine 1518177

Current hierarchy: **Mark E Daugherty; Stanley W Osborne → Stanmark Mining, Inc. → #2**

- 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:** Massey Energy Company → #2; 1993-01-01 to 2011-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Road Fork Development Company Inc → #2; 1999-07-01 to 2012-07-19; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Road Fork Development Company Inc; 1999-07-01 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → #2; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Road Fork Development Company Inc; 2011-06-01 to 2012-07-19; source msha-controller-operator-history
- **controller_controls_mine:** Stanley W Osborne et al → #2; 2012-04-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stanmark Mining, Inc. → #2; 2012-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stanley W Osborne et al → Stanmark Mining, Inc.; 2012-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark E Daugherty et al → Stanmark Mining, Inc.; 2012-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → #2; 2016-07-26 to 2018-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Road Fork Development Company Inc; 2016-07-26 to 2012-07-19; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Metallurgical Resources Inc → #2; 2018-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Road Fork Development Company Inc; 2018-11-09 to 2012-07-19; source msha-controller-operator-history