# Relationship history for MSHA mine 0405585

Current hierarchy: **Jerry  Sanders; Clint  Robison → CONCRETE AGGREGATE PRODUCTS INC → ELJAY PLANT PORTABLE**

- 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:** Jerry  Sanders  et al → ELJAY PLANT PORTABLE; 1991-08-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CONCRETE AGGREGATE PRODUCTS INC → ELJAY PLANT PORTABLE; 2004-03-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Sanders  et al → CONCRETE AGGREGATE PRODUCTS INC; 2004-03-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clint  Robison  et al → CONCRETE AGGREGATE PRODUCTS INC; 2004-03-30 to current/open; source msha-controller-operator-history