# Relationship history for MSHA mine 4607902

Current hierarchy: **Frederick J  Taylor → Princess Pollyanna → Princess Polly Anna #1 Surface**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Crawford Lewis C Jr → Princess Polly Anna #1 Surface; 1984-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Frederick J  Taylor → Princess Polly Anna #1 Surface; 1989-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rupert Feed & Supply Inc → Princess Polly Anna #1 Surface; 1990-06-01 to 1990-09-16; source msha-controller-operator-history
- **controller_controls_operator:** Crawford Lewis C Jr → Rupert Feed & Supply Inc; 1990-06-01 to 1990-09-16; source msha-controller-operator-history
- **operator_operates_mine:** Princess Pollyanna → Princess Polly Anna #1 Surface; 1990-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frederick J  Taylor → Princess Pollyanna; 1990-09-17 to current/open; source msha-controller-operator-history