# Relationship history for MSHA mine 0301545

Current hierarchy: **Kenneth Z  Ferrell → Johnsville Company LLC → JOHNSVILLE COMPANY LLC**

- 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:** Johnsville Sand & Gravel → JOHNSVILLE COMPANY LLC; 1983-01-01 to 2005-10-17; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth Z  Ferrell → JOHNSVILLE COMPANY LLC; 1983-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth Z  Ferrell → Johnsville Sand & Gravel; 1983-01-01 to 2005-10-17; source msha-controller-operator-history
- **operator_operates_mine:** Johnsville Company LLC → JOHNSVILLE COMPANY LLC; 2005-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth Z  Ferrell → JOHNSVILLE COMPANY LLC; 2005-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth Z  Ferrell → Johnsville Company LLC; 2005-10-18 to current/open; source msha-controller-operator-history