# Relationship history for MSHA mine 1517675

Current hierarchy: **Horizon Natural Resources Incorporated → Ikerd-Bandy Company Inc → Potato Knob #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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** James J  Kocian et al → Potato Knob #1; 1985-02-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ikerd-Bandy Company Inc → Potato Knob #1; 1995-05-01 to 1997-10-29; source msha-controller-operator-history
- **controller_controls_operator:** James J  Kocian et al → Ikerd-Bandy Company Inc; 1995-05-01 to 1997-10-29; source msha-controller-operator-history
- **controller_controls_mine:** Horizon Natural Resources Incorporated → Potato Knob #1; 1997-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ikerd-Bandy Company Inc → Potato Knob #1; 1997-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Horizon Natural Resources Incorporated → Ikerd-Bandy Company Inc; 1997-10-30 to current/open; source msha-controller-operator-history