# Relationship history for MSHA mine 1502408

Current hierarchy: **Sharitz Phil → Cimaron Minerals Inc → No 1**

- 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:** Progressive Energies Inc → No 1; 1950-01-01 to 1985-05-12; source msha-controller-operator-history
- **controller_controls_mine:** Smith Warney → No 1; 1950-01-01 to 1985-08-18; source msha-controller-operator-history
- **controller_controls_operator:** Smith Warney → Progressive Energies Inc; 1950-01-01 to 1985-05-12; source msha-controller-operator-history
- **operator_operates_mine:** Cimaron Minerals Inc → No 1; 1985-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sharitz Phil → No 1; 1985-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sharitz Phil → Cimaron Minerals Inc; 1985-05-13 to current/open; source msha-controller-operator-history