# Relationship history for MSHA mine 1518354

Current hierarchy: **Amon L  Mahon → Island Fork Construction Ltd → Island Fork Construction Ltd Mine#1**

- 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

- **controller_controls_mine:** Amon L  Mahon → Island Fork Construction Ltd Mine#1; 1994-11-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Island Fork Construction Ltd → Island Fork Construction Ltd Mine#1; 2001-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amon L  Mahon → Island Fork Construction Ltd; 2001-01-01 to current/open; source msha-controller-operator-history