# Relationship history for MSHA mine 2401960

Current hierarchy: **Apollo Gold Corporation → Apollo Gold Inc  Diamond Hill Mine → Diamond Hill**

- 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:** Diamond Hill Mining, Inc. → Diamond Hill; 1992-04-01 to 2002-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Apollo Gold Corporation → Diamond Hill; 1992-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Apollo Gold Corporation → Diamond Hill Mining, Inc.; 1992-04-01 to 2002-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Apollo Gold Inc  Diamond Hill Mine → Diamond Hill; 2002-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Apollo Gold Corporation → Diamond Hill; 2002-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Apollo Gold Corporation → Apollo Gold Inc  Diamond Hill Mine; 2002-04-01 to current/open; source msha-controller-operator-history