# Relationship history for MSHA mine 0202961

Current hierarchy: **Brian  Thomas; Cristy  Thomas → BLT Companies LLLP → BLT Companies Materials Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** BLT Companies LLC → BLT Companies Materials Plant; 2002-02-21 to 2012-10-08; source msha-controller-operator-history
- **controller_controls_mine:** Brian  Thomas → BLT Companies Materials Plant; 2002-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Thomas → BLT Companies LLC; 2002-02-21 to 2012-10-08; source msha-controller-operator-history
- **operator_operates_mine:** BLT Companies LLLP → BLT Companies Materials Plant; 2012-10-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gerald L  Thomas et al → BLT Companies Materials Plant; 2012-10-09 to 2018-04-25; source msha-controller-operator-history
- **controller_controls_operator:** Gerald L  Thomas et al → BLT Companies LLLP; 2012-10-09 to 2018-04-25; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Thomas et al → BLT Companies LLLP; 2012-10-09 to 2018-04-25; source msha-controller-operator-history
- **controller_controls_mine:** Cristy  Thomas  et al → BLT Companies Materials Plant; 2018-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cristy  Thomas  et al → BLT Companies LLLP; 2018-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Thomas et al → BLT Companies LLLP; 2018-04-26 to current/open; source msha-controller-operator-history