# Relationship history for MSHA mine 1002054

Current hierarchy: **Harold E  Smith → D Blosch Crushing Inc → D Blosch Crushing Inc #2**

- 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:** David K  Blosch → D Blosch Crushing Inc #2; 1998-07-17 to 2009-06-30; source msha-controller-operator-history
- **operator_operates_mine:** D Blosch Crushing Inc → D Blosch Crushing Inc #2; 2004-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David K  Blosch → D Blosch Crushing Inc; 2004-05-13 to 2009-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Harold E  Smith → D Blosch Crushing Inc #2; 2009-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harold E  Smith → D Blosch Crushing Inc; 2009-07-01 to current/open; source msha-controller-operator-history