# Relationship history for MSHA mine 1103319

Current hierarchy: **Kenneth T Sandeno → Morris Sand & Gravel iNc → East Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Romines Larry → East Plant; 2001-05-01 to 2003-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth T Sandeno → East Plant; 2004-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Morris Sand & Gravel iNc → East Plant; 2026-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth T Sandeno → Morris Sand & Gravel iNc; 2026-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Romines Larry → Morris Sand & Gravel iNc; 2026-06-22 to 2003-12-31; source msha-controller-operator-history