# Relationship history for MSHA mine 0301742

Current hierarchy: **Marlin Myra L → Marlin Mining & Remediation → COUNTY LINE 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:** B & B Mining Company → COUNTY LINE MINE; 1993-07-01 to 1996-02-18; source msha-controller-operator-history
- **controller_controls_mine:** Buck Clifton → COUNTY LINE MINE; 1993-07-01 to 1996-02-18; source msha-controller-operator-history
- **controller_controls_operator:** Buck Clifton → B & B Mining Company; 1993-07-01 to 1996-02-18; source msha-controller-operator-history
- **operator_operates_mine:** Marlin Mining & Remediation → COUNTY LINE MINE; 1996-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Marlin Myra L → COUNTY LINE MINE; 1996-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marlin Myra L → Marlin Mining & Remediation; 1996-02-19 to current/open; source msha-controller-operator-history