# Relationship history for MSHA mine 2302569

Current hierarchy: **(Lowell) Austin  Williams; Christopher C Williams → Bluewing Materials → Doniphan 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Doniphan Sand & Gravel, LLC → Doniphan Sand & Gravel; 2022-04-12 to 2024-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Christopher Claud  Williams → Doniphan Sand & Gravel; 2022-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christopher Claud  Williams → Doniphan Sand & Gravel, LLC; 2022-04-12 to 2024-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Bluewing Materials → Doniphan Sand & Gravel; 2024-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Christopher C Williams et al → Doniphan Sand & Gravel; 2024-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christopher C Williams et al → Bluewing Materials; 2024-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** (Lowell) Austin  Williams et al → Bluewing Materials; 2024-07-01 to current/open; source msha-controller-operator-history