# Relationship history for MSHA mine 4605002

Current hierarchy: **Fry Andrew J → Hewett Coal Company Inc → Hewett Fork No 2 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:** Lucas Edsel L → Hewett Fork No 2 Mine; 1950-01-01 to 1976-12-17; source msha-controller-operator-history
- **operator_operates_mine:** S S Joe Burford Inc → Hewett Fork No 2 Mine; 1976-01-01 to 1976-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Lucas Edsel L → S S Joe Burford Inc; 1976-01-01 to 1976-02-01; source msha-controller-operator-history
- **operator_operates_mine:** Hewett Coal Company Inc → Hewett Fork No 2 Mine; 1976-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fry Andrew J → Hewett Fork No 2 Mine; 1976-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fry Andrew J → Hewett Coal Company Inc; 1976-02-02 to current/open; source msha-controller-operator-history