# Relationship history for MSHA mine 2003173

Current hierarchy: **Jim  Spitza → B & B Transit Mix, Inc. → B & B TRANSIT MIX, INC.**

- 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:** B & B Transit Mix, Inc. → B & B TRANSIT MIX, INC.; 2000-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jim  Spitza → B & B TRANSIT MIX, INC.; 2000-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim  Spitza → B & B Transit Mix, Inc.; 2000-09-01 to current/open; source msha-controller-operator-history