# Relationship history for MSHA mine 4607842

Current hierarchy: **Kondrla Jerry → Bjp Inc → T V M Mine #1**

- 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:** Tygart Valley Mining Inc → T V M Mine #1; 1990-02-01 to 1993-09-12; source msha-controller-operator-history
- **controller_controls_mine:** Williams George R → T V M Mine #1; 1990-02-01 to 1993-09-12; source msha-controller-operator-history
- **controller_controls_operator:** Williams George R → Tygart Valley Mining Inc; 1990-02-01 to 1993-09-12; source msha-controller-operator-history
- **operator_operates_mine:** Bjp Inc → T V M Mine #1; 1993-09-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kondrla Jerry → T V M Mine #1; 1993-09-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kondrla Jerry → Bjp Inc; 1993-09-13 to current/open; source msha-controller-operator-history