# Relationship history for MSHA mine 4002199

Current hierarchy: **Renfroe R Bogan → Renfro Grading & Mining Inc → Eastern Energy No 1 Surface**

- 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:** Renfro Grading & Mining Inc → Eastern Energy No 1 Surface; 1977-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Renfroe R Bogan → Eastern Energy No 1 Surface; 1977-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Renfroe R Bogan → Renfro Grading & Mining Inc; 1977-03-01 to current/open; source msha-controller-operator-history