# Relationship history for MSHA mine 2003212

Current hierarchy: **Geraldine A  Weber → Weber Sand & Gravel, Inc. → Cedar Rapids 380**

- 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:** Geraldine A  Weber et al → Cedar Rapids 380; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Weber Sand & Gravel, Inc. → Cedar Rapids 380; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Geraldine A  Weber et al → Weber Sand & Gravel, Inc.; 2001-06-01 to current/open; source msha-controller-operator-history