# Relationship history for MSHA mine 2402779

Current hierarchy: **Buster  Bullock; Megan  Bullock → Bullock Contracting LLC → Port #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:** Megan  Bullock  et al → Port #2; 2000-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bullock Contracting LLC → Port #2; 2022-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Megan  Bullock  et al → Bullock Contracting LLC; 2022-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Buster  Bullock  et al → Bullock Contracting LLC; 2022-06-13 to current/open; source msha-controller-operator-history