# Relationship history for MSHA mine 1510066

Current hierarchy: **Baker Glenn → Makilba Mining Company Inc → No 1 Surface 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:** Thompson James C → No 1 Surface Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Baker Glenn → No 1 Surface Mine; 1976-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Diamond Fork Coal Company → No 1 Surface Mine; 1976-10-28 to 1979-03-04; source msha-controller-operator-history
- **controller_controls_operator:** Thompson James C → Diamond Fork Coal Company; 1976-10-28 to 1979-03-04; source msha-controller-operator-history
- **operator_operates_mine:** Makilba Mining Company Inc → No 1 Surface Mine; 1979-03-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Baker Glenn → Makilba Mining Company Inc; 1979-03-05 to current/open; source msha-controller-operator-history