# Relationship history for MSHA mine 5001922

Current hierarchy: **Colas S A → SERB → South 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:** Roger  Schnabel → South Crusher #2; 1999-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Southeast Roadbuilders, Inc. → South Crusher #2; 2010-03-05 to 2018-03-29; source msha-controller-operator-history
- **controller_controls_operator:** Roger  Schnabel → Southeast Roadbuilders, Inc.; 2010-03-05 to 2018-03-29; source msha-controller-operator-history
- **operator_operates_mine:** SERB → South Crusher #2; 2018-03-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Colas S A → South Crusher #2; 2018-03-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Colas S A → SERB; 2018-03-30 to current/open; source msha-controller-operator-history