# Relationship history for MSHA mine 1102973

Current hierarchy: **Donald J  Mueller → Consolidated Materials Inc. → CMI Marengo Facility**

- 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:** Coral Lake Sand & Gravel Inc → CMI Marengo Facility; 1995-05-01 to 2013-12-16; source msha-controller-operator-history
- **controller_controls_mine:** Leroy  Geske → CMI Marengo Facility; 1995-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leroy  Geske → Coral Lake Sand & Gravel Inc; 1995-05-01 to 2013-12-16; source msha-controller-operator-history
- **operator_operates_mine:** Consolidated Materials Inc. → CMI Marengo Facility; 2013-12-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donald J  Mueller → CMI Marengo Facility; 2013-12-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald J  Mueller → Consolidated Materials Inc.; 2013-12-17 to current/open; source msha-controller-operator-history