# Relationship history for MSHA mine 3608546

Current hierarchy: **Vincent  Guarna; Michael  Guarna → Mid-Valley Coal Sales,  Inc. → Shamokin Refuse Bank**

- 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:** Mid-Valley Coal Sales,  Inc. → Shamokin Refuse Bank; 1996-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joseph  Kleeman  et al → Shamokin Refuse Bank; 1996-02-01 to 2013-09-16; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Kleeman  et al → Mid-Valley Coal Sales,  Inc.; 1996-02-01 to 2013-09-16; source msha-controller-operator-history
- **controller_controls_mine:** Vincent  Guarna et al → Shamokin Refuse Bank; 2013-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vincent  Guarna et al → Mid-Valley Coal Sales,  Inc.; 2013-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Guarna et al → Mid-Valley Coal Sales,  Inc.; 2013-09-17 to current/open; source msha-controller-operator-history