# Relationship history for MSHA mine 3608956

Current hierarchy: **Travis W  Ott; Joshua  Bellinger → Bellinger-Ott Stone → OTT-STROPE QUARRY**

- 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

- **operator_operates_mine:** Bellinger-Ott Stone → OTT-STROPE QUARRY; 2001-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Travis W  Ott  et al → OTT-STROPE QUARRY; 2001-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Travis W  Ott  et al → Bellinger-Ott Stone; 2001-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joshua  Bellinger  et al → Bellinger-Ott Stone; 2001-04-01 to current/open; source msha-controller-operator-history