# Relationship history for MSHA mine 3001370

Current hierarchy: **Lance  Kenyon; Bill  Smith → Cossitt Concrete Products → Cossitt Sand 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:** Cossitt Concrete Products → Cossitt Sand Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John L  Cossitt → Cossitt Sand Pit; 1950-01-01 to 2010-11-01; source msha-controller-operator-history
- **controller_controls_operator:** John L  Cossitt → Cossitt Concrete Products; 1950-01-01 to 2010-11-01; source msha-controller-operator-history
- **controller_controls_mine:** Lance  Kenyon et al → Cossitt Sand Pit; 2010-11-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lance  Kenyon et al → Cossitt Concrete Products; 2010-11-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Smith et al → Cossitt Concrete Products; 2010-11-02 to current/open; source msha-controller-operator-history