# Relationship history for MSHA mine 1202360

Current hierarchy: **Elda Corporation → Elda Corporation → Cook Gravel**

- 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

- **operator_operates_mine:** Cook Block & Brick, Inc. → Cook Gravel; 2004-05-13 to 2006-05-04; source msha-controller-operator-history
- **controller_controls_mine:** Elda Corporation → Cook Gravel; 2004-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elda Corporation → Cook Block & Brick, Inc.; 2004-05-13 to 2006-05-04; source msha-controller-operator-history
- **operator_operates_mine:** Elda Corporation → Cook Gravel; 2006-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Elda Corporation → Cook Gravel; 2006-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elda Corporation → Elda Corporation; 2006-05-05 to current/open; source msha-controller-operator-history