# Relationship history for MSHA mine 4608638

Current hierarchy: **Garnett Raymond  Smith → Firetower Mining Inc → Miracle Mountain 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Phillip H  Edwards → Miracle Mountain Surface Mine; 1992-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Firetower Mining Inc → Miracle Mountain Surface Mine; 1997-05-01 to 1997-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Phillip H  Edwards → Firetower Mining Inc; 1997-05-01 to 1997-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Firetower Mining Inc → Miracle Mountain Surface Mine; 1997-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Garnett Raymond  Smith → Miracle Mountain Surface Mine; 1997-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Garnett Raymond  Smith → Firetower Mining Inc; 1997-07-01 to current/open; source msha-controller-operator-history