# Relationship history for MSHA mine 4801574

Current hierarchy: **Bryan  Barthelmess → Mc Garvin-Moberly Construction Company → CRUSHER #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:** Philip  Caines et al → CRUSHER #2; 1995-02-27 to 2022-01-04; source msha-controller-operator-history
- **operator_operates_mine:** Mc Garvin-Moberly Construction Company → CRUSHER #2; 1999-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Philip  Caines et al → Mc Garvin-Moberly Construction Company; 1999-11-01 to 2022-01-04; source msha-controller-operator-history
- **controller_controls_mine:** Bryan  Barthelmess → CRUSHER #2; 2022-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bryan  Barthelmess → Mc Garvin-Moberly Construction Company; 2022-01-05 to current/open; source msha-controller-operator-history