# Relationship history for MSHA mine 2302261

Current hierarchy: **L G Everist Inc → L. G. Everist, Inc. → Joplin Chat 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:** L G Everist Inc → Joplin Chat Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ballard Sand & Gravel → Joplin Chat Plant; 2002-04-09 to 2002-11-06; source msha-controller-operator-history
- **controller_controls_mine:** John  Ballard → Joplin Chat Plant; 2002-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Ballard → Ballard Sand & Gravel; 2002-04-09 to 2002-11-06; source msha-controller-operator-history
- **operator_operates_mine:** L. G. Everist, Inc. → Joplin Chat Plant; 2002-11-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** L G Everist Inc → L. G. Everist, Inc.; 2002-11-07 to current/open; source msha-controller-operator-history