# Relationship history for MSHA mine 4202220

Current hierarchy: **Craig  Dansie; Bruce  Evans → Nephi Sandstone Corp → NSC - SCIPIO PIT**

- 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

- **controller_controls_mine:** Bruce  Evans et al → NSC - SCIPIO PIT; 1989-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Nephi Sandstone Corp → NSC - SCIPIO PIT; 1998-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bruce  Evans et al → Nephi Sandstone Corp; 1998-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craig  Dansie et al → Nephi Sandstone Corp; 1998-08-01 to current/open; source msha-controller-operator-history