# Relationship history for MSHA mine 3900212

Current hierarchy: **GCC SAB de CV → Consolidated Ready Mix → Rabe Pit**

- 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:** R E Lien Inc → Rabe Pit; 1950-01-01 to 1984-07-19; source msha-controller-operator-history
- **controller_controls_mine:** Robert E  Lien → Rabe Pit; 1950-01-01 to 1984-07-19; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Lien → R E Lien Inc; 1950-01-01 to 1984-07-19; source msha-controller-operator-history
- **operator_operates_mine:** Henrich & Son Inc → Rabe Pit; 1984-07-20 to 2006-01-17; source msha-controller-operator-history
- **controller_controls_mine:** Thomas  Henrich → Rabe Pit; 1984-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Henrich → Henrich & Son Inc; 1984-07-20 to 2006-01-17; source msha-controller-operator-history
- **operator_operates_mine:** Consolidated Ready Mix → Rabe Pit; 2006-01-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** GCC SAB de CV → Rabe Pit; 2006-01-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** GCC SAB de CV → Consolidated Ready Mix; 2006-01-18 to current/open; source msha-controller-operator-history