# Relationship history for MSHA mine 1515103

Current hierarchy: **Pelphrey Jerry → Twin Star Contracting Company Inc → Twinstar No 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:** Twin Star Contracting Company Inc → Twinstar No 1; 1985-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pelphrey Jerry → Twinstar No 1; 1985-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pelphrey Jerry → Twin Star Contracting Company Inc; 1985-03-01 to current/open; source msha-controller-operator-history