# Relationship history for MSHA mine 2401684

Current hierarchy: **Nopper Fred → Ono Inc → William Manger**

- 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:** Ono Inc → William Manger; 1982-09-01 to 1983-10-26; source msha-controller-operator-history
- **controller_controls_mine:** Nopper Fred → William Manger; 1982-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nopper Fred → Ono Inc; 1982-09-01 to 1983-10-26; source msha-controller-operator-history
- **operator_operates_mine:** Rising Star → William Manger; 1983-10-27 to 1985-07-17; source msha-controller-operator-history
- **controller_controls_mine:** Zabiskie Allen & Dayrle Bourbou → William Manger; 1983-10-27 to 1985-07-17; source msha-controller-operator-history
- **controller_controls_operator:** Zabiskie Allen & Dayrle Bourbou → Rising Star; 1983-10-27 to 1985-07-17; source msha-controller-operator-history
- **operator_operates_mine:** Ono Inc → William Manger; 1985-07-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nopper Fred → Ono Inc; 1985-07-18 to current/open; source msha-controller-operator-history