# Relationship history for MSHA mine 4001664

Current hierarchy: **Taylor Charles T → C M C Coal Company → No 1 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 & C Coal Company → No 1 Mine; 1974-01-01 to 1975-02-04; source msha-controller-operator-history
- **controller_controls_mine:** Carson Dealus & Harvey Crabtree → No 1 Mine; 1974-01-01 to 1975-02-04; source msha-controller-operator-history
- **controller_controls_operator:** Carson Dealus & Harvey Crabtree → C & C Coal Company; 1974-01-01 to 1975-02-04; source msha-controller-operator-history
- **operator_operates_mine:** C M C Coal Company → No 1 Mine; 1975-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Taylor Charles T → No 1 Mine; 1975-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Taylor Charles T → C M C Coal Company; 1975-02-05 to current/open; source msha-controller-operator-history