# Relationship history for MSHA mine 3609091

Current hierarchy: **Alfred  Cassellbury; Cynthia  Brink → Cassel Brick Flagstone → Norma Mickel**

- 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:** Cassel Brick Flagstone → Norma Mickel; 2002-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cynthia  Brink  et al → Norma Mickel; 2002-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cynthia  Brink  et al → Cassel Brick Flagstone; 2002-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alfred  Cassellbury  et al → Cassel Brick Flagstone; 2002-05-15 to current/open; source msha-controller-operator-history