# Relationship history for MSHA mine 0405162

Current hierarchy: **Ponce Russell → Darwin Mineral Ventures L P → Darwin Operation**

- 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

- **operator_operates_mine:** California Milling Co L P → Darwin Operation; 1991-12-01 to 1994-12-05; source msha-controller-operator-history
- **controller_controls_mine:** White Philip R → Darwin Operation; 1991-12-01 to 1994-12-05; source msha-controller-operator-history
- **controller_controls_operator:** White Philip R → California Milling Co L P; 1991-12-01 to 1994-12-05; source msha-controller-operator-history
- **operator_operates_mine:** Darwin Mineral Ventures L P → Darwin Operation; 1994-12-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ponce Russell Et Al → Darwin Operation; 1994-12-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ponce Russell Et Al → Darwin Mineral Ventures L P; 1994-12-06 to current/open; source msha-controller-operator-history