# Relationship history for MSHA mine 0101357

Current hierarchy: **Renfroe R Bogan → Renfroe Grading Inc → Johnnie Wyatt Strip 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:** Renfroe Grading Inc → Johnnie Wyatt Strip Mine; 1975-06-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Renfroe R Bogan → Johnnie Wyatt Strip Mine; 1975-06-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Renfroe R Bogan → Renfroe Grading Inc; 1975-06-09 to current/open; source msha-controller-operator-history