# Relationship history for MSHA mine 2103285

Current hierarchy: **Jamie D  Dubbelde → Double D Gravel Inc → DOUBLE D GRAVEL**

- 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:** Double D Gravel Inc → DOUBLE D GRAVEL; 2001-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Doug  Dubbelde → DOUBLE D GRAVEL; 2001-03-01 to 2015-10-04; source msha-controller-operator-history
- **controller_controls_operator:** Doug  Dubbelde → Double D Gravel Inc; 2001-03-01 to 2015-10-04; source msha-controller-operator-history
- **controller_controls_mine:** Jamie D  Dubbelde → DOUBLE D GRAVEL; 2015-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jamie D  Dubbelde → Double D Gravel Inc; 2015-10-05 to current/open; source msha-controller-operator-history