# Relationship history for MSHA mine 1505074

Current hierarchy: **Price Jack C → J H Coal Company → No 10 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

- **operator_operates_mine:** C & L Coal Company Inc → No 10 Mine; 1950-01-01 to 1975-03-18; source msha-controller-operator-history
- **controller_controls_mine:** Little Willie → No 10 Mine; 1950-01-01 to 1975-03-18; source msha-controller-operator-history
- **controller_controls_operator:** Little Willie → C & L Coal Company Inc; 1950-01-01 to 1975-03-18; source msha-controller-operator-history
- **controller_controls_mine:** Price Jack C → No 10 Mine; 1974-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J H Coal Company → No 10 Mine; 1975-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Price Jack C → J H Coal Company; 1975-03-19 to current/open; source msha-controller-operator-history