# Relationship history for MSHA mine 2402203

Current hierarchy: **David  Maddison; Ron  Pack → J D L Construction Company → J.D.L. CONSTRUCTION SAND & GRAVE**

- 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:** J D L Construction Company → J.D.L. CONSTRUCTION SAND & GRAVE; 2000-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ron  Pack et al → J.D.L. CONSTRUCTION SAND & GRAVE; 2000-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ron  Pack et al → J D L Construction Company; 2000-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Maddison et al → J D L Construction Company; 2000-10-01 to current/open; source msha-controller-operator-history