# Relationship history for MSHA mine 4105263

Current hierarchy: **John B Shirley; Donna M Shirley → Riverside Rock, LLC → Riverside Rock Pit**

- 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:** Riverside Rock, LLC → Riverside Rock Pit; 2017-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John B Shirley et al → Riverside Rock Pit; 2017-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John B Shirley et al → Riverside Rock, LLC; 2017-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donna M Shirley et al → Riverside Rock, LLC; 2017-05-24 to current/open; source msha-controller-operator-history