# Relationship history for MSHA mine 3304282

Current hierarchy: **James P  Jurgensen II; Jacqueline J  Alf; Jason R  Jurgensen → Melvin Stone Company LLC → Melvin Stone Hamden Plant**

- 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:** Jaymar Quality Stone Company → Melvin Stone Hamden Plant; 1992-09-01 to 2013-06-02; source msha-controller-operator-history
- **controller_controls_mine:** Jay  Hall Jr → Melvin Stone Hamden Plant; 1992-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jay  Hall Jr → Jaymar Quality Stone Company; 1992-09-01 to 2013-06-02; source msha-controller-operator-history
- **controller_controls_mine:** James P  Jurgensen → Melvin Stone Hamden Plant; 1999-08-06 to 2018-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Melvin Stone Company LLC → Melvin Stone Hamden Plant; 2013-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James P  Jurgensen → Melvin Stone Company LLC; 2013-06-03 to 2018-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Jason R  Jurgensen et al → Melvin Stone Hamden Plant; 2018-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason R  Jurgensen et al → Melvin Stone Company LLC; 2018-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jacqueline J  Alf et al → Melvin Stone Company LLC; 2018-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James P  Jurgensen II et al → Melvin Stone Company LLC; 2018-05-01 to current/open; source msha-controller-operator-history