# Relationship history for MSHA mine 0404543

Current hierarchy: **Royal Gold Inc → Calgom Mining Inc → Calgom Mining Incorporated**

- 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:** Calgom Mining Inc → Calgom Mining Incorporated; 1981-10-01 to 1984-11-07; source msha-controller-operator-history
- **controller_controls_mine:** O'Neill William J → Calgom Mining Incorporated; 1981-10-01 to 1984-11-07; source msha-controller-operator-history
- **controller_controls_operator:** O'Neill William J → Calgom Mining Inc; 1981-10-01 to 1984-11-07; source msha-controller-operator-history
- **operator_operates_mine:** Goldstripe Joint Venture → Calgom Mining Incorporated; 1984-11-08 to 1987-06-21; source msha-controller-operator-history
- **controller_controls_mine:** Nca Minerals & Calgom Mining Inc → Calgom Mining Incorporated; 1984-11-08 to 1987-06-21; source msha-controller-operator-history
- **controller_controls_operator:** Nca Minerals & Calgom Mining Inc → Goldstripe Joint Venture; 1984-11-08 to 1987-06-21; source msha-controller-operator-history
- **operator_operates_mine:** Calgom Mining Inc → Calgom Mining Incorporated; 1987-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Royal Gold Inc → Calgom Mining Incorporated; 1987-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Royal Gold Inc → Calgom Mining Inc; 1987-06-22 to current/open; source msha-controller-operator-history