# Relationship history for MSHA mine 0600807

Current hierarchy: **Lee K  Baldwin; Jared R  Denis → PINE VALLEY MATERIALS LLC → PINE VALLEY MATERIALS, LLC**

- 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:** Colby Excavating, LLC → PINE VALLEY MATERIALS, LLC; 2018-06-04 to 2024-12-31; source msha-controller-operator-history
- **controller_controls_mine:** William George  Colby → PINE VALLEY MATERIALS, LLC; 2018-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William George  Colby → Colby Excavating, LLC; 2018-06-04 to 2024-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Pine Valley Materials LLC → PINE VALLEY MATERIALS, LLC; 2025-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lee K  Baldwin et al → PINE VALLEY MATERIALS, LLC; 2025-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lee K  Baldwin et al → Pine Valley Materials LLC; 2025-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jared R  Denis et al → Pine Valley Materials LLC; 2025-01-01 to current/open; source msha-controller-operator-history