# Relationship history for MSHA mine 4607219

Current hierarchy: **Harvey Ervin → Top Job Inc → Mine No 2**

- 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:** Cline Fred & James Henderson → Mine No 2; 1983-07-29 to 1987-10-11; source msha-controller-operator-history
- **operator_operates_mine:** Top Job Inc → Mine No 2; 1986-10-01 to 1987-10-11; source msha-controller-operator-history
- **controller_controls_operator:** Cline Fred & James Henderson → Top Job Inc; 1986-10-01 to 1987-10-11; source msha-controller-operator-history
- **operator_operates_mine:** Top Job Inc → Mine No 2; 1987-10-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harvey Ervin → Mine No 2; 1987-10-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harvey Ervin → Top Job Inc; 1987-10-12 to current/open; source msha-controller-operator-history