# Relationship history for MSHA mine 2103362

Current hierarchy: **Tom  McDonough; John B  Heselton → Bituminous Materials, LLC. → Commander Screener**

- 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:** Bituminous Materials, LLC. → Commander Screener; 2003-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tom  McDonough  et al → Commander Screener; 2003-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tom  McDonough  et al → Bituminous Materials, LLC.; 2003-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John B  Heselton  et al → Bituminous Materials, LLC.; 2003-07-01 to current/open; source msha-controller-operator-history