# Relationship history for MSHA mine 4801668

Current hierarchy: **Bert  Dale; Bart  Dale → B & B Enterprises, L.L.C. → Portable 2**

- 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

- **controller_controls_mine:** Connie  Dale → Portable 2; 1998-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & B Aggregates → Portable 2; 2005-05-03 to 2025-06-23; source msha-controller-operator-history
- **controller_controls_operator:** Connie  Dale → B & B Aggregates; 2005-05-03 to 2025-06-23; source msha-controller-operator-history
- **controller_controls_mine:** Bart  Dale et al → Portable 2; 2023-04-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & B Enterprises, L.L.C. → Portable 2; 2025-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bart  Dale et al → B & B Enterprises, L.L.C.; 2025-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bert  Dale et al → B & B Enterprises, L.L.C.; 2025-06-24 to current/open; source msha-controller-operator-history