# Relationship history for MSHA mine 2500383

Current hierarchy: **Michael  Werner → Werner Aggregates, Inc. → BELVIDERE PIT**

- 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:** Nichols Construction (DPL) → BELVIDERE PIT; 1950-01-01 to 2026-04-22; source msha-controller-operator-history
- **controller_controls_mine:** Philip F  Werner Jr et al → BELVIDERE PIT; 1950-01-01 to 2025-03-25; source msha-controller-operator-history
- **controller_controls_operator:** Philip F  Werner Jr et al → Nichols Construction (DPL); 1950-01-01 to 2025-03-25; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Werner → BELVIDERE PIT; 2025-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Werner → Nichols Construction (DPL); 2025-03-26 to 2026-04-22; source msha-controller-operator-history
- **operator_operates_mine:** Werner Aggregates, Inc. → BELVIDERE PIT; 2026-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Werner → Werner Aggregates, Inc.; 2026-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Philip F  Werner Jr et al → Werner Aggregates, Inc.; 2026-04-23 to 2025-03-25; source msha-controller-operator-history