# Relationship history for MSHA mine 3607128

Current hierarchy: **Zampatti David → Cougar Grant Mining Company Inc → Slak Mine**

- 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:** James H Petricca → Slak Mine; 1981-04-01 to 1989-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Petricca James H → Slak Mine; 1981-04-01 to 1989-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Petricca James H → James H Petricca; 1981-04-01 to 1989-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Dan Petricca → Slak Mine; 1989-07-01 to 1992-03-12; source msha-controller-operator-history
- **controller_controls_mine:** Petricca Dan → Slak Mine; 1989-07-01 to 1992-03-12; source msha-controller-operator-history
- **controller_controls_operator:** Petricca Dan → Dan Petricca; 1989-07-01 to 1992-03-12; source msha-controller-operator-history
- **operator_operates_mine:** Cougar Grant Mining Company Inc → Slak Mine; 1992-03-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Zampatti David → Slak Mine; 1992-03-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Zampatti David → Cougar Grant Mining Company Inc; 1992-03-13 to current/open; source msha-controller-operator-history