# Relationship history for MSHA mine 1102902

Current hierarchy: **Mineral Development Corp Of DE → Mdc Of Illinois Inc → Streamline 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Mdc Of Illinois Inc → Streamline Plant; 1990-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mineral Development Corp Of DE → Streamline Plant; 1990-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mineral Development Corp Of DE → Mdc Of Illinois Inc; 1990-09-01 to current/open; source msha-controller-operator-history