# Relationship history for MSHA mine 3304112

Current hierarchy: **Pittston Company → Addington Inc → Ohio Job #1**

- 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

- **controller_controls_mine:** Horizon Natural Resources Incorporated → Ohio Job #1; 1983-08-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Addington Inc → Ohio Job #1; 1987-09-01 to 1994-01-13; source msha-controller-operator-history
- **controller_controls_operator:** Horizon Natural Resources Incorporated → Addington Inc; 1987-09-01 to 1994-01-13; source msha-controller-operator-history
- **operator_operates_mine:** Addington Inc → Ohio Job #1; 1994-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pittston Company → Ohio Job #1; 1994-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pittston Company → Addington Inc; 1994-01-14 to current/open; source msha-controller-operator-history