# Relationship history for MSHA mine 3200884

Current hierarchy: **Pam  Szarkowski; Tyler  Szarkowski → RTS Shearing LLC → RTS Shearing**

- 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:** RTS Shearing LLC → RTS Shearing; 2011-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tyler  Szarkowski et al → RTS Shearing; 2011-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tyler  Szarkowski et al → RTS Shearing LLC; 2011-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pam  Szarkowski et al → RTS Shearing LLC; 2011-08-24 to current/open; source msha-controller-operator-history