# Relationship history for MSHA mine 4105773

Current hierarchy: **Tanner  Gambrell; Tyler  Gambrell → Rowe Valley Materials → Granger 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Rowe Valley Materials → Granger Quarry; 2024-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tanner  Gambrell et al → Granger Quarry; 2024-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tanner  Gambrell et al → Rowe Valley Materials; 2024-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tyler  Gambrell et al → Rowe Valley Materials; 2024-09-10 to current/open; source msha-controller-operator-history