# Relationship history for MSHA mine 0102528

Current hierarchy: **William  Mc Leod → Friese Hauling Inc → CHAMPION PIT #2**

- 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

- **controller_controls_mine:** William  Mc Leod → CHAMPION PIT #2; 1983-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** D & D Gravel → CHAMPION PIT #2; 1983-02-01 to 1995-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Shear Donald E → CHAMPION PIT #2; 1983-02-01 to 1995-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Shear Donald E → D & D Gravel; 1983-02-01 to 1995-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Friese Hauling Inc → CHAMPION PIT #2; 1995-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Mc Leod → Friese Hauling Inc; 1995-10-01 to current/open; source msha-controller-operator-history