# Relationship history for MSHA mine 4608251

Current hierarchy: **Roberts Lorine → Hilo Energy Corp → Mine No 1**

- 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:** Marco Land Company Inc → Mine No 1; 1992-12-01 to 1993-08-25; source msha-controller-operator-history
- **controller_controls_mine:** Charles O  Davis Jr → Mine No 1; 1992-12-01 to 1993-08-25; source msha-controller-operator-history
- **controller_controls_operator:** Charles O  Davis Jr → Marco Land Company Inc; 1992-12-01 to 1993-08-25; source msha-controller-operator-history
- **operator_operates_mine:** Hilo Energy Corp → Mine No 1; 1993-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roberts Lorine → Mine No 1; 1993-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roberts Lorine → Hilo Energy Corp; 1993-08-26 to current/open; source msha-controller-operator-history