# Relationship history for MSHA mine 4801886

Current hierarchy: **Kasslie  Branson; William Brock Branson → Dark Horse Trucking Inc. → Leigh Ranch - Smith Pit**

- 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:** Dark Horse Trucking Inc. → Leigh Ranch - Smith Pit; 2024-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William Brock Branson et al → Leigh Ranch - Smith Pit; 2024-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William Brock Branson et al → Dark Horse Trucking Inc.; 2024-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kasslie  Branson et al → Dark Horse Trucking Inc.; 2024-08-26 to current/open; source msha-controller-operator-history