# Relationship history for MSHA mine 1512685

Current hierarchy: **Sams Jerry L → Blue Max Mining Inc → No 1**

- 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

- **operator_operates_mine:** W R W Inc → No 1; 1981-01-01 to 1981-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Alford Jess--Roy David Hampton Et Al → No 1; 1981-01-01 to 1981-06-18; source msha-controller-operator-history
- **controller_controls_operator:** Alford Jess--Roy David Hampton Et Al → W R W Inc; 1981-01-01 to 1981-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Woolum Roger & Bill Et Al → No 1; 1981-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** W R W Inc → No 1; 1981-06-19 to 1981-06-23; source msha-controller-operator-history
- **controller_controls_mine:** Hampton Roy David--L R Parton Et Al → No 1; 1981-06-19 to 1981-06-23; source msha-controller-operator-history
- **controller_controls_operator:** Hampton Roy David--L R Parton Et Al → W R W Inc; 1981-06-19 to 1981-06-23; source msha-controller-operator-history
- **operator_operates_mine:** W R W Corp → No 1; 1981-06-24 to 1982-04-07; source msha-controller-operator-history
- **controller_controls_operator:** Woolum Roger & Bill Et Al → W R W Corp; 1981-06-24 to 1982-04-07; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Laurel Coal Company → No 1; 1982-04-08 to 1982-06-16; source msha-controller-operator-history
- **controller_controls_mine:** Mc Knight Roger-Michael Bargo Et Al → No 1; 1982-04-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Knight Roger-Michael Bargo Et Al → Mountain Laurel Coal Company; 1982-04-08 to 1982-06-16; source msha-controller-operator-history
- **operator_operates_mine:** Lee Anne Enterprises → No 1; 1982-06-17 to 1982-07-11; source msha-controller-operator-history
- **controller_controls_mine:** Donahoe Clifford → No 1; 1982-06-17 to 1982-07-11; source msha-controller-operator-history
- **controller_controls_operator:** Donahoe Clifford → Lee Anne Enterprises; 1982-06-17 to 1982-07-11; source msha-controller-operator-history
- **operator_operates_mine:** Blue Max Mining Inc → No 1; 1982-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sams Jerry L → No 1; 1982-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sams Jerry L → Blue Max Mining Inc; 1982-07-12 to current/open; source msha-controller-operator-history