# Relationship history for MSHA mine 2302116

Current hierarchy: **Riverstone Group → Bussen Quarries Inc → BUSSEN SOUTH UG**

- 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

- **controller_controls_mine:** Riverstone Group → BUSSEN SOUTH UG; 1990-05-01 to 2012-01-29; source msha-controller-operator-history
- **operator_operates_mine:** Bussen Quarries Inc → BUSSEN SOUTH UG; 1995-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Riverstone Group → Bussen Quarries Inc; 1995-02-01 to 2012-01-29; source msha-controller-operator-history
- **controller_controls_mine:** Bussen Quarries Inc et al → BUSSEN SOUTH UG; 2012-01-30 to 2022-10-19; source msha-controller-operator-history
- **controller_controls_operator:** Bussen Quarries Inc et al → Bussen Quarries Inc; 2012-01-30 to 2022-10-19; source msha-controller-operator-history
- **controller_controls_operator:** Riverstone Group et al → Bussen Quarries Inc; 2012-01-30 to 2022-10-19; source msha-controller-operator-history
- **controller_controls_mine:** Riverstone Group → BUSSEN SOUTH UG; 2022-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Riverstone Group → Bussen Quarries Inc; 2022-10-20 to current/open; source msha-controller-operator-history