# Relationship history for MSHA mine 2302300

Current hierarchy: **Barbara J  Leatherman → Eagle Claw Construction → Hwy 376 Quarry #1**

- 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:** Eagle Claw Construction → Hwy 376 Quarry #1; 2004-12-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Barbara J  Leatherman → Hwy 376 Quarry #1; 2004-12-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barbara J  Leatherman → Eagle Claw Construction; 2004-12-23 to current/open; source msha-controller-operator-history