# Relationship history for MSHA mine 1510255

Current hierarchy: **W Leonard  Womble → Appalachian Fuel Sales 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

- **controller_controls_mine:** Kincer Delmar → No 1 Plant; 1974-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Creekway Coal Company Inc → No 1 Plant; 1977-02-02 to 1978-06-14; source msha-controller-operator-history
- **controller_controls_operator:** Kincer Delmar → Creekway Coal Company Inc; 1977-02-02 to 1978-06-14; source msha-controller-operator-history
- **operator_operates_mine:** Creek Way Coal Company Inc → No 1 Plant; 1978-06-15 to 1979-10-30; source msha-controller-operator-history
- **controller_controls_mine:** Legg Morgan W Sr → No 1 Plant; 1978-06-15 to 1980-08-17; source msha-controller-operator-history
- **controller_controls_operator:** Legg Morgan W Sr → Creek Way Coal Company Inc; 1978-06-15 to 1979-10-30; source msha-controller-operator-history
- **operator_operates_mine:** Appalachian Fuel Sales Inc → No 1 Plant; 1979-10-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** W Leonard  Womble → No 1 Plant; 1979-10-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** W Leonard  Womble → Appalachian Fuel Sales Inc; 1979-10-31 to current/open; source msha-controller-operator-history