# Relationship history for MSHA mine 0504679

Current hierarchy: **Larry B  Conley Jr → Conley Construction → Kevin Lee Screening Plant**

- 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:** Conley Construction → Kevin Lee Screening Plant; 1999-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Larry B  Conley Jr → Kevin Lee Screening Plant; 1999-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry B  Conley Jr → Conley Construction; 1999-01-01 to current/open; source msha-controller-operator-history