# Relationship history for MSHA mine 1601345

Current hierarchy: **Jean Kass  Connick; Mamie  Kass → Kass Bros., Inc. → Kass Bros Inc**

- 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:** Kass Brothers Inc → Kass Bros Inc; 1999-03-01 to 2003-12-15; source msha-controller-operator-history
- **controller_controls_mine:** Mamie  Kass et al → Kass Bros Inc; 1999-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mamie  Kass et al → Kass Brothers Inc; 1999-03-01 to 2003-12-15; source msha-controller-operator-history
- **controller_controls_operator:** Jean Kass  Connick et al → Kass Brothers Inc; 1999-03-01 to 2003-12-15; source msha-controller-operator-history
- **operator_operates_mine:** J P & Sons Dredging LLC → Kass Bros Inc; 2003-12-16 to 2005-02-03; source msha-controller-operator-history
- **controller_controls_mine:** Joseph  Phillips Sr → Kass Bros Inc; 2003-12-16 to 2007-08-01; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Phillips Sr → J P & Sons Dredging LLC; 2003-12-16 to 2005-02-03; source msha-controller-operator-history
- **operator_operates_mine:** Kass Bros., Inc. → Kass Bros Inc; 2005-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jean Kass  Connick et al → Kass Bros., Inc.; 2005-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mamie  Kass et al → Kass Bros., Inc.; 2005-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Marion  Phillips → Kass Bros Inc; 2007-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marion  Phillips → J P & Sons Dredging LLC; 2007-08-02 to 2005-02-03; source msha-controller-operator-history