# Relationship history for MSHA mine 1514299

Current hierarchy: **Franks Billy Ray → Billy Ray Franks Construction → 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Billy Ray Franks Construction → No 1 Surface Mine; 1983-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Franks Billy Ray → No 1 Surface Mine; 1983-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Franks Billy Ray → Billy Ray Franks Construction; 1983-10-01 to current/open; source msha-controller-operator-history