# Relationship history for MSHA mine 1504407

Current hierarchy: **Bill  Wagers → Park Valley Inc → No 1 Plant**

- 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:** Short Creek Coal Company → No 1 Plant; 1950-01-01 to 1973-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Short Creek Coal Company → No 1 Plant; 1950-01-01 to 1973-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Short Creek Coal Company → Short Creek Coal Company; 1950-01-01 to 1973-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Kilburn Walter → No 1 Plant; 1973-03-01 to 1974-09-30; source msha-controller-operator-history
- **operator_operates_mine:** A & J Coal Company → No 1 Plant; 1973-10-01 to 1974-03-01; source msha-controller-operator-history
- **controller_controls_operator:** Kilburn Walter → A & J Coal Company; 1973-10-01 to 1974-03-01; source msha-controller-operator-history
- **controller_controls_mine:** Simpson James W → No 1 Plant; 1973-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Skyuka Mining Corp → No 1 Plant; 1974-03-02 to 1975-07-28; source msha-controller-operator-history
- **controller_controls_operator:** Simpson James W → Skyuka Mining Corp; 1974-03-02 to 1975-07-28; source msha-controller-operator-history
- **controller_controls_mine:** T W Oil Inc → No 1 Plant; 1975-07-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Joc Coal Mining Inc → No 1 Plant; 1975-07-29 to 1981-02-11; source msha-controller-operator-history
- **controller_controls_operator:** T W Oil Inc → Joc Coal Mining Inc; 1975-07-29 to 1981-02-11; source msha-controller-operator-history
- **operator_operates_mine:** Hatfield Terminals Inc → No 1 Plant; 1981-02-12 to 1985-11-05; source msha-controller-operator-history
- **controller_controls_mine:** James T  Hatfield → No 1 Plant; 1981-02-12 to 1985-11-05; source msha-controller-operator-history
- **controller_controls_operator:** James T  Hatfield → Hatfield Terminals Inc; 1981-02-12 to 1985-11-05; source msha-controller-operator-history
- **operator_operates_mine:** Co Clay Inc → No 1 Plant; 1985-11-06 to 1987-04-13; source msha-controller-operator-history
- **controller_controls_mine:** Cotton John → No 1 Plant; 1985-11-06 to 1987-04-13; source msha-controller-operator-history
- **controller_controls_operator:** Cotton John → Co Clay Inc; 1985-11-06 to 1987-04-13; source msha-controller-operator-history
- **operator_operates_mine:** Co Clay Inc → No 1 Plant; 1987-04-14 to 1990-07-02; source msha-controller-operator-history
- **controller_controls_mine:** Bishop William H → No 1 Plant; 1987-04-14 to 1990-07-02; source msha-controller-operator-history
- **controller_controls_operator:** Bishop William H → Co Clay Inc; 1987-04-14 to 1990-07-02; source msha-controller-operator-history
- **operator_operates_mine:** Hazel Creek Energy Inc → No 1 Plant; 1990-07-03 to 1993-07-21; source msha-controller-operator-history
- **controller_controls_mine:** Brown Clyde Jr → No 1 Plant; 1990-07-03 to 1993-07-21; source msha-controller-operator-history
- **controller_controls_operator:** Brown Clyde Jr → Hazel Creek Energy Inc; 1990-07-03 to 1993-07-21; source msha-controller-operator-history
- **operator_operates_mine:** Park Valley Inc → No 1 Plant; 1993-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bill  Wagers → No 1 Plant; 1993-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Wagers → Park Valley Inc; 1993-07-22 to current/open; source msha-controller-operator-history