# Relationship history for MSHA mine 3304563

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

- 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:** James P  Jurgensen → Westfall; 1999-08-06 to 2018-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Westfall Aggregate & Materials, Inc. → Westfall; 2006-02-14 to 2026-03-09; source msha-controller-operator-history
- **controller_controls_mine:** Kevin R  Steward → Westfall; 2006-02-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin R  Steward → Westfall Aggregate & Materials, Inc.; 2006-02-14 to 2026-03-09; source msha-controller-operator-history
- **controller_controls_mine:** Jacqueline J  Alf et al → Westfall; 2018-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Melvin Stone Company LLC → Westfall; 2026-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jacqueline J  Alf et al → Melvin Stone Company LLC; 2026-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James P  Jurgensen II et al → Melvin Stone Company LLC; 2026-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason R  Jurgensen et al → Melvin Stone Company LLC; 2026-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James P  Jurgensen → Melvin Stone Company LLC; 2026-03-10 to 2018-04-30; source msha-controller-operator-history