# Relationship history for MSHA mine 4404054

Current hierarchy: **Jackson Jimmie → Grassy Branch Coal Company Inc → No 7 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:** Mc Glothlin Henry M → No 7 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jackson Jimmie → No 7 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** H M Mc Glothlin Coal Company Inc → No 7 Mine; 1975-04-21 to 1977-07-17; source msha-controller-operator-history
- **controller_controls_operator:** Mc Glothlin Henry M → H M Mc Glothlin Coal Company Inc; 1975-04-21 to 1977-07-17; source msha-controller-operator-history
- **operator_operates_mine:** Grassy Branch Coal Company Inc → No 7 Mine; 1977-07-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Jimmie → Grassy Branch Coal Company Inc; 1977-07-18 to current/open; source msha-controller-operator-history