# Relationship history for MSHA mine 1512960

Current hierarchy: **Creech Edison → Twins & Paul Inc → 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:** Twins & Paul Inc → No 1 Mine; 1981-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Creech Edison → No 1 Mine; 1981-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Creech Edison → Twins & Paul Inc; 1981-07-01 to current/open; source msha-controller-operator-history