# Relationship history for MSHA mine 0203448

Current hierarchy: **Dennis  Swapp → Swapp Construction Inc. → Swapp Custom Crushing Plant #5**

- 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:** Dennis  Swapp et al → Swapp Custom Crushing Plant #5; 1995-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Swapp Construction Inc. → Swapp Custom Crushing Plant #5; 2021-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Swapp et al → Swapp Construction Inc.; 2021-07-28 to current/open; source msha-controller-operator-history