# Relationship history for MSHA mine 1509930

Current hierarchy: **Aminex Resources Corp → New Brush Creek Mining → No 1 Surface**

- 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:** New Brush Creek Mining Corp → No 1 Surface; 1976-09-01 to 1977-01-26; source msha-controller-operator-history
- **controller_controls_mine:** Mills Vance Et Al → No 1 Surface; 1976-09-01 to 1977-01-26; source msha-controller-operator-history
- **controller_controls_operator:** Mills Vance Et Al → New Brush Creek Mining Corp; 1976-09-01 to 1977-01-26; source msha-controller-operator-history
- **operator_operates_mine:** New Brush Creek Mining → No 1 Surface; 1977-01-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Aminex Resources Corp → No 1 Surface; 1977-01-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aminex Resources Corp → New Brush Creek Mining; 1977-01-27 to current/open; source msha-controller-operator-history