# Relationship history for MSHA mine 0203450

Current hierarchy: **Daniel  Arnold; William  Slanaker; Charlie  Bowles → Hayhook, LLC → Hayhook Sand & Gravel**

- 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:** Hayhook, LLC → Hayhook Sand & Gravel; 2021-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark D  Brinton et al → Hayhook Sand & Gravel; 2021-09-15 to 2025-12-29; source msha-controller-operator-history
- **controller_controls_operator:** Mark D  Brinton et al → Hayhook, LLC; 2021-09-15 to 2025-12-29; source msha-controller-operator-history
- **controller_controls_operator:** Carol A  Brinton et al → Hayhook, LLC; 2021-09-15 to 2025-12-29; source msha-controller-operator-history
- **controller_controls_mine:** Daniel  Arnold et al → Hayhook Sand & Gravel; 2025-12-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel  Arnold et al → Hayhook, LLC; 2025-12-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charlie  Bowles et al → Hayhook, LLC; 2025-12-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Slanaker et al → Hayhook, LLC; 2025-12-30 to current/open; source msha-controller-operator-history