# Relationship history for MSHA mine 3503773

Current hierarchy: **Melvin  McDougal; Greg  Demers → Lost Creek Rock Products LLC → Lost Creek Quarry**

- 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:** Lost Creek Rock Products LLC → Lost Creek Quarry; 2011-12-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Greg  Demers et al → Lost Creek Quarry; 2011-12-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Demers et al → Lost Creek Rock Products LLC; 2011-12-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Melvin  McDougal et al → Lost Creek Rock Products LLC; 2011-12-13 to current/open; source msha-controller-operator-history