# Relationship history for MSHA mine 3607252

Current hierarchy: **Cuteri Fred A → Eureka Energy Company → Orisik Strip**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Kirch Construction Company → Orisik Strip; 1981-12-01 to 1984-06-28; source msha-controller-operator-history
- **controller_controls_mine:** Kirch Joseph G → Orisik Strip; 1981-12-01 to 1984-06-28; source msha-controller-operator-history
- **controller_controls_operator:** Kirch Joseph G → Kirch Construction Company; 1981-12-01 to 1984-06-28; source msha-controller-operator-history
- **operator_operates_mine:** Eureka Energy Company → Orisik Strip; 1984-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cuteri Fred A → Orisik Strip; 1984-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cuteri Fred A → Eureka Energy Company; 1984-06-29 to current/open; source msha-controller-operator-history