# Relationship history for MSHA mine 2002744

Current hierarchy: **Walker William R & J C Storie → West Side Aggregates Inc → El Jay Plant #1**

- 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:** Associated Aggregates Inc → El Jay Plant #1; 1986-03-01 to 1993-08-25; source msha-controller-operator-history
- **controller_controls_mine:** Joel  Garett → El Jay Plant #1; 1986-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joel  Garett → Associated Aggregates Inc; 1986-03-01 to 1993-08-25; source msha-controller-operator-history
- **operator_operates_mine:** West Side Aggregates Inc → El Jay Plant #1; 1993-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Walker William R & J C Storie → El Jay Plant #1; 1993-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Walker William R & J C Storie → West Side Aggregates Inc; 1993-08-26 to current/open; source msha-controller-operator-history