# Relationship history for MSHA mine 3609176

Current hierarchy: **Leonard A  Rossi → Rossi Excavating Co. → Coleraine Operation**

- 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:** Leonard A  Rossi → Coleraine Operation; 1983-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wilbur W  White Jr → Coleraine Operation; 1992-08-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wilbur White Coal Co. Inc. → Coleraine Operation; 2003-11-03 to 2006-09-13; source msha-controller-operator-history
- **controller_controls_operator:** Wilbur W  White Jr → Wilbur White Coal Co. Inc.; 2003-11-03 to 2006-09-13; source msha-controller-operator-history
- **operator_operates_mine:** Rossi Excavating Co. → Coleraine Operation; 2006-09-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leonard A  Rossi → Rossi Excavating Co.; 2006-09-14 to current/open; source msha-controller-operator-history