# Relationship history for MSHA mine 0101134

Current hierarchy: **West Ed → West Coal Company Inc → Prospect Job**

- 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:** Taylor Coal Company Inc → Prospect Job; 1950-01-01 to 1973-12-17; source msha-controller-operator-history
- **controller_controls_mine:** Taylor Walter Scott Sr & Jr → Prospect Job; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Taylor Walter Scott Sr & Jr → Taylor Coal Company Inc; 1950-01-01 to 1973-12-17; source msha-controller-operator-history
- **controller_controls_mine:** West Ed → Prospect Job; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** West Coal Company Inc → Prospect Job; 1973-12-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** West Ed → West Coal Company Inc; 1973-12-18 to current/open; source msha-controller-operator-history