# Relationship history for MSHA mine 1517734

Current hierarchy: **Carl  Kirk → North Star Mining, Inc. → No 4**

- 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 → No 4; 1994-11-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Island Fork Construction Ltd → No 4; 1995-11-01 to 2002-03-24; source msha-controller-operator-history
- **controller_controls_operator:** Amon L  Mahon → Island Fork Construction Ltd; 1995-11-01 to 2002-03-24; source msha-controller-operator-history
- **controller_controls_mine:** Carl  Kirk et al → No 4; 1998-02-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** North Star Mining, Inc. → No 4; 2002-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl  Kirk et al → North Star Mining, Inc.; 2002-03-25 to current/open; source msha-controller-operator-history