# Relationship history for MSHA mine 2301707

Current hierarchy: **Tom  Ottendorf → Clever Stone Quarry Inc → Reeds Spring Quarry And Mill**

- 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:** Clever Stone Quarry Inc → Reeds Spring Quarry And Mill; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tom  Ottendorf → Reeds Spring Quarry And Mill; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tom  Ottendorf → Clever Stone Quarry Inc; 1978-03-09 to current/open; source msha-controller-operator-history