# Relationship history for MSHA mine 2302491

Current hierarchy: **Webster County-MO → Seymour Special Road District  #8 → Seymour  Special Road District #8**

- 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:** Seymour Special Road District  #8 → Seymour  Special Road District #8; 2015-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Webster County-MO → Seymour  Special Road District #8; 2015-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Webster County-MO → Seymour Special Road District  #8; 2015-02-01 to current/open; source msha-controller-operator-history