# Relationship history for MSHA mine 2800954

Current hierarchy: **Harris John L → Harris Brothers Construction Company Inc → HARRIS BROS. 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:** Harris Brothers Construction Company Inc → HARRIS BROS. PIT; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harris John L → HARRIS BROS. PIT; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harris John L → Harris Brothers Construction Company Inc; 1979-01-01 to current/open; source msha-controller-operator-history