# Relationship history for MSHA mine 4406174

Current hierarchy: **Bobby W  Hill → Virginia City Enterprises Inc → Tipple No 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

- **controller_controls_mine:** Slemp Joseph L & Gary Mitchell → Tipple No 1; 1979-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tray Coal Processors Inc → Tipple No 1; 1985-01-01 to 1996-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Slemp Joseph L & Gary Mitchell → Tray Coal Processors Inc; 1985-01-01 to 1996-04-14; source msha-controller-operator-history
- **operator_operates_mine:** Wyldwood Enterprises Inc → Tipple No 1; 1996-04-15 to 2000-08-21; source msha-controller-operator-history
- **controller_controls_mine:** Brian K  Mitchell et al → Tipple No 1; 1996-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian K  Mitchell et al → Wyldwood Enterprises Inc; 1996-04-15 to 2000-08-21; source msha-controller-operator-history
- **operator_operates_mine:** Virginia City Enterprises Inc → Tipple No 1; 2000-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bobby W  Hill → Tipple No 1; 2000-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bobby W  Hill → Virginia City Enterprises Inc; 2000-08-22 to current/open; source msha-controller-operator-history