# Relationship history for MSHA mine 2901071

Current hierarchy: **Richard P  Cook → Mountain States Builders Inc → Crusher-#1**

- 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:** Mc Reynolds Construction Company → Crusher-#1; 1950-01-01 to 1987-03-25; source msha-controller-operator-history
- **controller_controls_mine:** Mc Reynolds Daniel L → Crusher-#1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Reynolds Daniel L → Mc Reynolds Construction Company; 1950-01-01 to 1987-03-25; source msha-controller-operator-history
- **operator_operates_mine:** Mountain States Builders Inc → Crusher-#1; 1987-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard P  Cook → Crusher-#1; 1987-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard P  Cook → Mountain States Builders Inc; 1987-03-26 to current/open; source msha-controller-operator-history