# Relationship history for MSHA mine 1518500

Current hierarchy: **Stanley R  Ditty → B & D Mining L.L.C. → B & D #3**

- 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:** Stanley R  Ditty → B & D #3; 2001-07-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & D Mining L.L.C. → B & D #3; 2002-01-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stanley R  Ditty → B & D Mining L.L.C.; 2002-01-07 to current/open; source msha-controller-operator-history