# Relationship history for MSHA mine 1100134

Current hierarchy: **Riverstone Group → RiverStone Group Inc → Midway Stone #45**

- 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:** RiverStone Group Inc → Midway Stone #45; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Riverstone Group → Midway Stone #45; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Riverstone Group → RiverStone Group Inc; 1950-01-01 to current/open; source msha-controller-operator-history