# Relationship history for MSHA mine 3102271

Current hierarchy: **Pamela W  Prince; Kevin M  Prince → B & M Prince Development Corporation → Prince Development Borrow Pit**

- 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:** B & M Prince Development Corporation → Prince Development Borrow Pit; 2012-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pamela W  Prince et al → Prince Development Borrow Pit; 2012-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pamela W  Prince et al → B & M Prince Development Corporation; 2012-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin M  Prince et al → B & M Prince Development Corporation; 2012-02-07 to current/open; source msha-controller-operator-history