# Relationship history for MSHA mine 0801152

Current hierarchy: **Burden Randy O → 545 Clay & Landfill Inc → 545 Clay 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:** 545 Clay & Landfill Inc → 545 Clay Pit; 1991-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Burden Randy O → 545 Clay Pit; 1991-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Burden Randy O → 545 Clay & Landfill Inc; 1991-02-01 to current/open; source msha-controller-operator-history