# Relationship history for MSHA mine 3607837

Current hierarchy: **Wilbur W  White Jr → Wilbur White Coal Company Inc → Katherine Refuse Removal 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:** Carucci Robert A → Katherine Refuse Removal Operation; 1982-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Intercoal Inc → Katherine Refuse Removal Operation; 1986-10-01 to 1992-08-06; source msha-controller-operator-history
- **controller_controls_operator:** Carucci Robert A → Intercoal Inc; 1986-10-01 to 1992-08-06; source msha-controller-operator-history
- **operator_operates_mine:** Wilbur White Coal Company Inc → Katherine Refuse Removal Operation; 1992-08-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wilbur W  White Jr → Katherine Refuse Removal Operation; 1992-08-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wilbur W  White Jr → Wilbur White Coal Company Inc; 1992-08-07 to current/open; source msha-controller-operator-history