# Relationship history for MSHA mine 2100531

Current hierarchy: **Rodney S  Turner → Turner Sand & Gravel Inc → Wolverton Pit & Mill**

- 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:** Rodney S  Turner et al → Wolverton Pit & Mill; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hubert Oye Construction Company → Wolverton Pit & Mill; 1950-01-01 to 1981-07-12; source msha-controller-operator-history
- **controller_controls_mine:** Oye Brad → Wolverton Pit & Mill; 1950-01-01 to 1981-07-12; source msha-controller-operator-history
- **controller_controls_operator:** Oye Brad → Hubert Oye Construction Company; 1950-01-01 to 1981-07-12; source msha-controller-operator-history
- **operator_operates_mine:** Turner Sand & Gravel Inc → Wolverton Pit & Mill; 1981-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rodney S  Turner et al → Turner Sand & Gravel Inc; 1981-07-13 to current/open; source msha-controller-operator-history