# Relationship history for MSHA mine 4104371

Current hierarchy: **Weldon E  Ratliff → Ratliff Ready Mix L.P. → Raymond Creek Sand & Gravel**

- 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:** Ratliff Ready Mix L.P. → Raymond Creek Sand & Gravel; 2002-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ron L  Carlisle → Raymond Creek Sand & Gravel; 2002-06-04 to 2007-04-02; source msha-controller-operator-history
- **controller_controls_operator:** Ron L  Carlisle → Ratliff Ready Mix L.P.; 2002-06-04 to 2007-04-02; source msha-controller-operator-history
- **controller_controls_mine:** Weldon E  Ratliff et al → Raymond Creek Sand & Gravel; 2007-04-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Weldon E  Ratliff et al → Ratliff Ready Mix L.P.; 2007-04-03 to current/open; source msha-controller-operator-history