# Relationship history for MSHA mine 4609365

Current hierarchy: **Three W Corp; Jones & Jordan Engineering Inc → Caldwell Trailblazer LLC → Bald Knob Surface Mine**

- 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:** Caldwell Trailblazer LLC → Bald Knob Surface Mine; 2010-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Three W Corp et al → Bald Knob Surface Mine; 2010-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Three W Corp et al → Caldwell Trailblazer LLC; 2010-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jones & Jordan Engineering Inc et al → Caldwell Trailblazer LLC; 2010-01-01 to current/open; source msha-controller-operator-history