# Relationship history for MSHA mine 1503845

Current hierarchy: **Andalex Resources B V → West Ken Coal Corp → Venture Strip Mine**

- 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:** Badgett Mine Stripping Corp → Venture Strip Mine; 1971-01-01 to 1976-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Badgett Rogers → Venture Strip Mine; 1971-01-01 to 1976-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Badgett Rogers → Badgett Mine Stripping Corp; 1971-01-01 to 1976-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Badgett Mine Stripping Corp → Venture Strip Mine; 1977-01-01 to 1979-01-30; source msha-controller-operator-history
- **controller_controls_mine:** Thomas Ross H → Venture Strip Mine; 1977-01-01 to 1979-01-30; source msha-controller-operator-history
- **controller_controls_operator:** Thomas Ross H → Badgett Mine Stripping Corp; 1977-01-01 to 1979-01-30; source msha-controller-operator-history
- **controller_controls_mine:** Andalex Resources B V → Venture Strip Mine; 1977-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** West Ken Coal Corp → Venture Strip Mine; 1979-01-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Andalex Resources B V → West Ken Coal Corp; 1979-01-31 to current/open; source msha-controller-operator-history