# Relationship history for MSHA mine 0102004

Current hierarchy: **Calvert Jerry → Van Mulvehill Coal Company Inc → Black Creek 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

- **operator_operates_mine:** Van Mulvehill Coal Company Inc → Black Creek No 1; 1979-01-01 to 1981-10-26; source msha-controller-operator-history
- **controller_controls_mine:** Mulvehill Van → Black Creek No 1; 1979-01-01 to 1981-10-26; source msha-controller-operator-history
- **controller_controls_operator:** Mulvehill Van → Van Mulvehill Coal Company Inc; 1979-01-01 to 1981-10-26; source msha-controller-operator-history
- **operator_operates_mine:** Van Mulvehill Coal Company Inc → Black Creek No 1; 1981-10-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Calvert Jerry → Black Creek No 1; 1981-10-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Calvert Jerry → Van Mulvehill Coal Company Inc; 1981-10-27 to current/open; source msha-controller-operator-history