# Relationship history for MSHA mine 5001315

Current hierarchy: **Cambior Inc → Cambior Alaska Inc → Valdez Creek Mine**

- 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:** Denali Mining Company → Valdez Creek Mine; 1980-04-01 to 1984-05-21; source msha-controller-operator-history
- **controller_controls_mine:** Ames C B → Valdez Creek Mine; 1980-04-01 to 1984-05-21; source msha-controller-operator-history
- **controller_controls_operator:** Ames C B → Denali Mining Company; 1980-04-01 to 1984-05-21; source msha-controller-operator-history
- **operator_operates_mine:** Sum Resources Inc → Valdez Creek Mine; 1984-05-22 to 1984-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Sullivan Mines Inc → Valdez Creek Mine; 1984-05-22 to 1984-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Sullivan Mines Inc → Sum Resources Inc; 1984-05-22 to 1984-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Valdez Creek Mining Company Inc → Valdez Creek Mine; 1985-01-01 to 1985-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Gauthier F → Valdez Creek Mine; 1985-01-01 to 1985-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Gauthier F → Valdez Creek Mining Company Inc; 1985-01-01 to 1985-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Valdez Creek Mining Company Inc → Valdez Creek Mine; 1986-01-01 to 1987-06-16; source msha-controller-operator-history
- **controller_controls_mine:** Shultz Don H → Valdez Creek Mine; 1986-01-01 to 1987-06-16; source msha-controller-operator-history
- **controller_controls_operator:** Shultz Don H → Valdez Creek Mining Company Inc; 1986-01-01 to 1987-06-16; source msha-controller-operator-history
- **operator_operates_mine:** Cambior Alaska Inc → Valdez Creek Mine; 1987-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cambior Inc → Valdez Creek Mine; 1987-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cambior Inc → Cambior Alaska Inc; 1987-06-17 to current/open; source msha-controller-operator-history