# Relationship history for MSHA mine 2401541

Current hierarchy: **Taylor Darryl → Taylor Mining Company → Taylor Mill**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Buckeye Mines Inc → Taylor Mill; 1980-05-01 to 1984-07-12; source msha-controller-operator-history
- **controller_controls_mine:** Mortensen Steve → Taylor Mill; 1980-05-01 to 1984-08-26; source msha-controller-operator-history
- **controller_controls_operator:** Mortensen Steve → Buckeye Mines Inc; 1980-05-01 to 1984-07-12; source msha-controller-operator-history
- **operator_operates_mine:** Taylor Mining Company → Taylor Mill; 1984-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Taylor Darryl → Taylor Mill; 1984-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Taylor Darryl → Taylor Mining Company; 1984-07-13 to current/open; source msha-controller-operator-history