# Relationship history for MSHA mine 1518550

Current hierarchy: **Amon L  Mahon → Island Fork Construction, LTD → IFC Mine No.3**

- 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

- **controller_controls_mine:** Amon L  Mahon → IFC Mine No.3; 1994-11-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Island Fork Construction, LTD → IFC Mine No.3; 2002-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amon L  Mahon → Island Fork Construction, LTD; 2002-06-11 to current/open; source msha-controller-operator-history