# Relationship history for MSHA mine 1700907

Current hierarchy: **Daniel E  Downs → Elwood Downs Incorporated → Rock Crusher**

- 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:** Elwood Downs Incorporated → Rock Crusher; 2013-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daniel E  Downs → Rock Crusher; 2013-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel E  Downs → Elwood Downs Incorporated; 2013-05-24 to current/open; source msha-controller-operator-history