# Relationship history for MSHA mine 2302085

Current hierarchy: **Camden County-Mo → Camden County Road & Bridge → CAMDEN CO RD & BRIDGE**

- 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

- **operator_operates_mine:** Camden County Road & Bridge → CAMDEN CO RD & BRIDGE; 1993-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Camden County-Mo → CAMDEN CO RD & BRIDGE; 1993-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Camden County-Mo → Camden County Road & Bridge; 1993-05-01 to current/open; source msha-controller-operator-history