# Relationship history for MSHA mine 1519513

Current hierarchy: **Timothy S  Phipps; Carl  Douglas → C & T Excavators, LLC → Emlyn Processing**

- 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

- **controller_controls_mine:** Carl  Douglas  et al → Emlyn Processing; 2009-04-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C & T Excavators, LLC → Emlyn Processing; 2010-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl  Douglas  et al → C & T Excavators, LLC; 2010-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy S  Phipps  et al → C & T Excavators, LLC; 2010-07-12 to current/open; source msha-controller-operator-history