# Relationship history for MSHA mine 4202301

Current hierarchy: **Gary M Kapp; Jacob M Kapp; Ricky  Yorgason → Kapp Construction & Development → Portable #1**

- 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:** Kapp Construction & Development → Portable #1; 2000-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary M  Kapp → Portable #1; 2000-09-01 to 2019-12-11; source msha-controller-operator-history
- **controller_controls_operator:** Gary M  Kapp → Kapp Construction & Development; 2000-09-01 to 2019-12-11; source msha-controller-operator-history
- **controller_controls_mine:** Gary M Kapp et al → Portable #1; 2019-12-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary M Kapp et al → Kapp Construction & Development; 2019-12-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ricky  Yorgason et al → Kapp Construction & Development; 2019-12-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jacob M Kapp et al → Kapp Construction & Development; 2019-12-12 to current/open; source msha-controller-operator-history