# Relationship history for MSHA mine 0302070

Current hierarchy: **Charles  Stapp → Stapp Quarries LLC → Stapp Quarries LLC**

- 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:** Riverside Sand LLC → Stapp Quarries LLC; 2019-12-19 to 2022-11-20; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Stapp → Stapp Quarries LLC; 2019-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Stapp → Riverside Sand LLC; 2019-12-19 to 2022-11-20; source msha-controller-operator-history
- **operator_operates_mine:** Stapp Quarries LLC → Stapp Quarries LLC; 2022-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Stapp → Stapp Quarries LLC; 2022-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Stapp → Stapp Quarries LLC; 2022-11-21 to current/open; source msha-controller-operator-history