# Relationship history for MSHA mine 4503793

Current hierarchy: **Doug  Domke → DRD Construction, L.L.C. → Plant 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:** DRD Construction, L.L.C. → Plant 1; 2019-05-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Doug  Domke → Plant 1; 2019-05-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Doug  Domke → DRD Construction, L.L.C.; 2019-05-14 to current/open; source msha-controller-operator-history