# Relationship history for MSHA mine 1202013

Current hierarchy: **Jasper Clyde → Jasper & Jasper Coal Company Inc → Scotland Mine**

- 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:** Jasper Clyde Et Al → Scotland Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Garrison James B → Scotland Mine; 1981-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chaney Ralph → Scotland Mine; 1984-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bar Construction Inc → Scotland Mine; 1987-10-01 to 1988-03-13; source msha-controller-operator-history
- **controller_controls_operator:** Garrison James B → Bar Construction Inc; 1987-10-01 to 1988-03-13; source msha-controller-operator-history
- **operator_operates_mine:** Chaney Mining Inc → Scotland Mine; 1988-03-14 to 1989-05-22; source msha-controller-operator-history
- **controller_controls_operator:** Chaney Ralph → Chaney Mining Inc; 1988-03-14 to 1989-05-22; source msha-controller-operator-history
- **operator_operates_mine:** Jasper & Jasper Coal Company Inc → Scotland Mine; 1989-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jasper Clyde Et Al → Jasper & Jasper Coal Company Inc; 1989-05-23 to current/open; source msha-controller-operator-history