# Relationship history for MSHA mine 2000878

Current hierarchy: **Paul J  Kelley → West Shore Construction Company → ZUTPHEN 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:** West Shore Construction Company Inc → ZUTPHEN PIT; 1950-01-01 to 1993-03-31; source msha-controller-operator-history
- **controller_controls_mine:** John G  Yerington → ZUTPHEN PIT; 1950-01-01 to 1993-03-31; source msha-controller-operator-history
- **controller_controls_operator:** John G  Yerington → West Shore Construction Company Inc; 1950-01-01 to 1993-03-31; source msha-controller-operator-history
- **operator_operates_mine:** West Shore Construction Company → ZUTPHEN PIT; 1993-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Paul J  Kelley → ZUTPHEN PIT; 1993-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul J  Kelley → West Shore Construction Company; 1993-04-01 to current/open; source msha-controller-operator-history