# Relationship history for MSHA mine 4503172

Current hierarchy: **Jason  Wood → Ryterra → Ryterra 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:** 410 Quarry Inc → Ryterra LLC; 1988-06-01 to 2007-11-13; source msha-controller-operator-history
- **controller_controls_mine:** Laramie P  Joubert → Ryterra LLC; 1988-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Laramie P  Joubert → 410 Quarry Inc; 1988-06-01 to 2007-11-13; source msha-controller-operator-history
- **controller_controls_mine:** Ben  Kessell et al → Ryterra LLC; 2001-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** 410 Quarry Dibella Enterprises Inc → Ryterra LLC; 2007-11-14 to 2011-05-24; source msha-controller-operator-history
- **controller_controls_mine:** Augustine B  Dibella → Ryterra LLC; 2007-11-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Augustine B  Dibella → 410 Quarry Dibella Enterprises Inc; 2007-11-14 to 2011-05-24; source msha-controller-operator-history
- **operator_operates_mine:** Interwest Development NW Inc → Ryterra LLC; 2011-05-25 to 2020-06-23; source msha-controller-operator-history
- **controller_controls_operator:** Ben  Kessell et al → Interwest Development NW Inc; 2011-05-25 to 2020-06-23; source msha-controller-operator-history
- **operator_operates_mine:** Ryterra → Ryterra LLC; 2020-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jason  Wood → Ryterra LLC; 2020-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason  Wood → Ryterra; 2020-06-24 to current/open; source msha-controller-operator-history