# Relationship history for MSHA mine 4503507

Current hierarchy: **Ray D  Winters; Ronald G  Berg → Wasser & Winters Co → Owl Creek Wasser & Winters Co**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Owl Creek Sand Co → Owl Creek Wasser & Winters Co; 2002-01-31 to 2002-05-29; source msha-controller-operator-history
- **controller_controls_mine:** Jerry  Nutter → Owl Creek Wasser & Winters Co; 2002-01-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Nutter → Owl Creek Sand Co; 2002-01-31 to 2002-05-29; source msha-controller-operator-history
- **operator_operates_mine:** Wasser & Winters Co → Owl Creek Wasser & Winters Co; 2002-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ray D  Winters et al → Owl Creek Wasser & Winters Co; 2002-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ray D  Winters et al → Wasser & Winters Co; 2002-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald G  Berg et al → Wasser & Winters Co; 2002-05-30 to current/open; source msha-controller-operator-history