# Relationship history for MSHA mine 0200840

Current hierarchy: **Wedgetail Holdings LLC → Wedgetail Operations LLC → Oracle Ridge 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:** Oracle Ridge Mining Partners → Oracle Ridge Mine; 1950-01-01 to 2012-06-21; source msha-controller-operator-history
- **controller_controls_mine:** Santa Catalina Corp & Continental Materials Corp → Oracle Ridge Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Santa Catalina Corp & Continental Materials Corp → Oracle Ridge Mining Partners; 1950-01-01 to 2012-06-21; source msha-controller-operator-history
- **operator_operates_mine:** Oracle Ridge Mining LLC → Oracle Ridge Mine; 2012-06-22 to 2019-11-27; source msha-controller-operator-history
- **controller_controls_mine:** Oracle Mining Corp → Oracle Ridge Mine; 2012-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Oracle Mining Corp → Oracle Ridge Mining LLC; 2012-06-22 to 2019-11-27; source msha-controller-operator-history
- **operator_operates_mine:** Wedgetail Operations LLC → Oracle Ridge Mine; 2019-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wedgetail Holdings LLC → Oracle Ridge Mine; 2019-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wedgetail Holdings LLC → Wedgetail Operations LLC; 2019-11-28 to current/open; source msha-controller-operator-history