# Relationship history for MSHA mine 1508604

Current hierarchy: **Collins Carl → Connie & Jay 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

- **controller_controls_mine:** Banks Roger → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Little Joe Coal Company → No 1 Mine; 1975-08-04 to 1976-08-11; source msha-controller-operator-history
- **controller_controls_operator:** Banks Roger → Little Joe Coal Company; 1975-08-04 to 1976-08-11; source msha-controller-operator-history
- **operator_operates_mine:** Connie & Jay Coal Company → No 1 Mine; 1976-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Collins Carl → No 1 Mine; 1976-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Collins Carl → Connie & Jay Coal Company; 1976-08-12 to current/open; source msha-controller-operator-history