# Relationship history for MSHA mine 1901180

Current hierarchy: **John B  Tonlino III; Kimberley A  Tonlino → TONLINO & SONS LLC → TONLINO PORTABLE**

- 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:** Tonlino & Sons LLC → TONLINO PORTABLE; 2008-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John B  Tonlino III  et al → TONLINO PORTABLE; 2008-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John B  Tonlino III  et al → Tonlino & Sons LLC; 2008-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kimberley A  Tonlino  et al → Tonlino & Sons LLC; 2008-08-12 to current/open; source msha-controller-operator-history