# Relationship history for MSHA mine 0103309

Current hierarchy: **Pamela K  Whitley → P W Contracting → Shomma Mine**

- 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:** P W Contracting → Shomma Mine; 2005-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pamela K  Whitley → Shomma Mine; 2005-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pamela K  Whitley → P W Contracting; 2005-01-17 to current/open; source msha-controller-operator-history