# Relationship history for MSHA mine 3003252

Current hierarchy: **Patrick  Bistrian III → Bistrian Materials DBA Calverton Materials → Calverton Materials**

- 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:** T S Haulers Inc → Calverton Materials; 1998-10-01 to 2011-06-21; source msha-controller-operator-history
- **controller_controls_mine:** Edward  Partridge → Calverton Materials; 1998-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward  Partridge → T S Haulers Inc; 1998-10-01 to 2011-06-21; source msha-controller-operator-history
- **operator_operates_mine:** Calverton Tree Farm Inc → Calverton Materials; 2011-06-22 to 2024-10-27; source msha-controller-operator-history
- **controller_controls_mine:** Constance  Partridge → Calverton Materials; 2011-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Constance  Partridge → Calverton Tree Farm Inc; 2011-06-22 to 2024-10-27; source msha-controller-operator-history
- **operator_operates_mine:** Bistrian Materials DBA Calverton Materials → Calverton Materials; 2024-10-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Patrick  Bistrian III → Calverton Materials; 2024-10-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patrick  Bistrian III → Bistrian Materials DBA Calverton Materials; 2024-10-28 to current/open; source msha-controller-operator-history