# Relationship history for MSHA mine 4300821

Current hierarchy: **Shawn  Pollard; Matthew D Priestley → Crown Point Excavation LLC → KLEEMANN MC90I**

- 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:** Crown Point Excavation LLC → KLEEMANN MC90I; 2023-10-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Matthew D Priestley et al → KLEEMANN MC90I; 2023-10-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew D Priestley et al → Crown Point Excavation LLC; 2023-10-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shawn  Pollard et al → Crown Point Excavation LLC; 2023-10-08 to current/open; source msha-controller-operator-history