# Relationship history for MSHA mine 1508038

Current hierarchy: **Horizon Natural Resources Incorporated → Ikerd-Bandy Company Inc → Perry County #1 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Tesoro Petroleum → Perry County #1 Strip; 1975-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tesoro Coal Company → Perry County #1 Strip; 1975-01-31 to 1984-05-13; source msha-controller-operator-history
- **controller_controls_operator:** Tesoro Petroleum → Tesoro Coal Company; 1975-01-31 to 1984-05-13; source msha-controller-operator-history
- **controller_controls_mine:** Sunoco, Inc. → Perry County #1 Strip; 1983-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Whitaker Coal Corp → Perry County #1 Strip; 1984-05-14 to 1994-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Sunoco, Inc. → Whitaker Coal Corp; 1984-05-14 to 1994-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Cockrell'S Fork Mining → Perry County #1 Strip; 1994-07-01 to 1997-10-29; source msha-controller-operator-history
- **controller_controls_mine:** James J  Kocian et al → Perry County #1 Strip; 1994-07-01 to 1997-10-29; source msha-controller-operator-history
- **controller_controls_operator:** James J  Kocian et al → Cockrell'S Fork Mining; 1994-07-01 to 1997-10-29; source msha-controller-operator-history
- **controller_controls_mine:** Horizon Natural Resources Incorporated → Perry County #1 Strip; 1997-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ikerd-Bandy Company Inc → Perry County #1 Strip; 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