# Relationship history for MSHA mine 3605072

Current hierarchy: **Kinter Royden E & Clair B → Marion Center Mining Company Inc → Grant #1 Strip**

- 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:** Kinter Royden E & Clair B → Grant #1 Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Marion Center Mining Company Inc → Grant #1 Strip; 1974-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kinter Royden E & Clair B → Marion Center Mining Company Inc; 1974-04-01 to current/open; source msha-controller-operator-history