# Relationship history for MSHA mine 4606645

Current hierarchy: **Cross Karl T-Michael → Double Diamond Mining Inc → #1**

- 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:** Double Diamond Mining Inc → #1; 1982-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cross Karl T-Michael Et Al → #1; 1982-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cross Karl T-Michael Et Al → Double Diamond Mining Inc; 1982-12-01 to current/open; source msha-controller-operator-history