# Relationship history for MSHA mine 1201176

Current hierarchy: **Cary P  Groninger; Richard  Groninger → G & G Hauling & Excavating Inc → G And G Sand And Gravel Pit No 2**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** G & G Hauling & Excavating Inc → G And G Sand And Gravel Pit No 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cary P  Groninger et al → G And G Sand And Gravel Pit No 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cary P  Groninger et al → G & G Hauling & Excavating Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Groninger et al → G & G Hauling & Excavating Inc; 1950-01-01 to current/open; source msha-controller-operator-history