# Relationship history for MSHA mine 1509774

Current hierarchy: **Baker Nobe & Barry Rogers → Spike Coal Company 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

- **controller_controls_mine:** Wells George D → No 1; 1975-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & G Greenbriar Coal Company Inc → No 1; 1976-06-26 to 1981-04-19; source msha-controller-operator-history
- **controller_controls_operator:** Wells George D → B & G Greenbriar Coal Company Inc; 1976-06-26 to 1981-04-19; source msha-controller-operator-history
- **controller_controls_mine:** Parsons Paul A & Sammy Blanton Jr → No 1; 1976-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cardinal Resources Inc → No 1; 1978-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** P & B Coal Company → No 1; 1981-04-20 to 1981-11-11; source msha-controller-operator-history
- **controller_controls_operator:** Parsons Paul A & Sammy Blanton Jr → P & B Coal Company; 1981-04-20 to 1981-11-11; source msha-controller-operator-history
- **operator_operates_mine:** Cardinal Resources Inc → No 1; 1981-11-12 to 1982-01-03; source msha-controller-operator-history
- **controller_controls_operator:** Cardinal Resources Inc → Cardinal Resources Inc; 1981-11-12 to 1982-01-03; source msha-controller-operator-history
- **operator_operates_mine:** Cooper Coal Inc → No 1; 1982-01-04 to 1982-01-05; source msha-controller-operator-history
- **controller_controls_mine:** Smallman Junior → No 1; 1982-01-04 to 1982-01-05; source msha-controller-operator-history
- **controller_controls_operator:** Smallman Junior → Cooper Coal Inc; 1982-01-04 to 1982-01-05; source msha-controller-operator-history
- **operator_operates_mine:** Cardinal Resources Inc → No 1; 1982-01-06 to 1983-09-13; source msha-controller-operator-history
- **controller_controls_operator:** Cardinal Resources Inc → Cardinal Resources Inc; 1982-01-06 to 1983-09-13; source msha-controller-operator-history
- **operator_operates_mine:** Spike Coal Company Inc → No 1; 1983-09-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Baker Nobe & Barry Rogers Et Al → No 1; 1983-09-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Baker Nobe & Barry Rogers Et Al → Spike Coal Company Inc; 1983-09-14 to current/open; source msha-controller-operator-history