# Relationship history for MSHA mine 4400657

Current hierarchy: **Perkins Harlan L & H L--Charles W Dye → V K Coal Company Inc → No 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

- **operator_operates_mine:** V & K Coal Company Inc → No 1; 1950-01-01 to 1978-12-28; source msha-controller-operator-history
- **controller_controls_mine:** Trent Birl → No 1; 1950-01-01 to 1978-12-28; source msha-controller-operator-history
- **controller_controls_operator:** Trent Birl → V & K Coal Company Inc; 1950-01-01 to 1978-12-28; source msha-controller-operator-history
- **operator_operates_mine:** V & K Coal Company Inc → No 1; 1978-12-29 to 1979-04-08; source msha-controller-operator-history
- **controller_controls_mine:** Reynolds Clyde E → No 1; 1978-12-29 to 1979-04-08; source msha-controller-operator-history
- **controller_controls_operator:** Reynolds Clyde E → V & K Coal Company Inc; 1978-12-29 to 1979-04-08; source msha-controller-operator-history
- **operator_operates_mine:** V K Coal Company Inc → No 1; 1979-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Perkins Harlan L & H L--Charles W Dye → No 1; 1979-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Perkins Harlan L & H L--Charles W Dye → V K Coal Company Inc; 1979-04-09 to current/open; source msha-controller-operator-history