# Relationship history for MSHA mine 0201951

Current hierarchy: **Schultze Ray → Southwest Resources Inc → Solstice 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:** Freeel Inc → Solstice No 1; 1979-09-01 to 1982-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Escapule E H → Solstice No 1; 1979-09-01 to 1982-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Escapule E H → Freeel Inc; 1979-09-01 to 1982-04-14; source msha-controller-operator-history
- **operator_operates_mine:** Southwest Resources Inc → Solstice No 1; 1982-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Schultze Ray → Solstice No 1; 1982-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Schultze Ray → Southwest Resources Inc; 1982-04-15 to current/open; source msha-controller-operator-history