# Relationship history for MSHA mine 1518611

Current hierarchy: **Timothy L  Webb → IKERD COAL COMPANY, LLC → PUNCH HOLLOW 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** IKERD COAL COMPANY, LLC → PUNCH HOLLOW JOB; 2003-02-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Frank H  Ikerd III → PUNCH HOLLOW JOB; 2003-02-06 to 2005-06-09; source msha-controller-operator-history
- **controller_controls_operator:** Frank H  Ikerd III → IKERD COAL COMPANY, LLC; 2003-02-06 to 2005-06-09; source msha-controller-operator-history
- **controller_controls_mine:** Timothy L  Webb → PUNCH HOLLOW JOB; 2005-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy L  Webb → IKERD COAL COMPANY, LLC; 2005-06-10 to current/open; source msha-controller-operator-history