# Relationship history for MSHA mine 0202824

Current hierarchy: **Gunnison Copper Corp → Gunnison Copper → Gunnison & Johnson Camp Mines**

- 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:** Nord Resources Corporation → Gunnison & Johnson Camp Mines; 1999-06-01 to 2015-12-14; source msha-controller-operator-history
- **controller_controls_mine:** Nord Resources Corp → Gunnison & Johnson Camp Mines; 1999-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nord Resources Corp → Nord Resources Corporation; 1999-06-01 to 2015-12-14; source msha-controller-operator-history
- **operator_operates_mine:** Excelsior Mining JCM Incorporated → Gunnison & Johnson Camp Mines; 2015-12-15 to 2024-08-07; source msha-controller-operator-history
- **controller_controls_mine:** Gunnison Copper Corp → Gunnison & Johnson Camp Mines; 2015-12-15 to 2024-08-07; source msha-controller-operator-history
- **controller_controls_operator:** Gunnison Copper Corp → Excelsior Mining JCM Incorporated; 2015-12-15 to 2024-08-07; source msha-controller-operator-history
- **operator_operates_mine:** Gunnison Copper → Gunnison & Johnson Camp Mines; 2024-08-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gunnison Copper Corp → Gunnison & Johnson Camp Mines; 2024-08-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gunnison Copper Corp → Gunnison Copper; 2024-08-08 to current/open; source msha-controller-operator-history