# Relationship history for MSHA mine 4403264

Current hierarchy: **SunCoke Energy Incorporated → Dominion Coal Corporation → Young'S Br #15**

- 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:** B Ray  Thompson → Young'S Br #15; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Standard Smokeless Coal Co Inc → Young'S Br #15; 1950-01-01 to 1976-03-09; source msha-controller-operator-history
- **controller_controls_mine:** Standard Smokeless Coal Co Inc → Young'S Br #15; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Standard Smokeless Coal Co Inc → Standard Smokeless Coal Co Inc; 1950-01-01 to 1976-03-09; source msha-controller-operator-history
- **operator_operates_mine:** Youngs Branch Coal Company → Young'S Br #15; 1976-03-10 to 1979-10-31; source msha-controller-operator-history
- **controller_controls_operator:** B Ray  Thompson → Youngs Branch Coal Company; 1976-03-10 to 1979-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Sunoco, Inc. → Young'S Br #15; 1979-10-29 to 2012-01-16; source msha-controller-operator-history
- **operator_operates_mine:** Dominion Coal Corporation → Young'S Br #15; 1979-11-01 to 1993-06-27; source msha-controller-operator-history
- **controller_controls_operator:** Sunoco, Inc. → Dominion Coal Corporation; 1979-11-01 to 1993-06-27; source msha-controller-operator-history
- **controller_controls_mine:** Noah L  Vandyke → Young'S Br #15; 1992-12-17 to 1996-01-03; source msha-controller-operator-history
- **operator_operates_mine:** Key West Mining Inc → Young'S Br #15; 1993-06-28 to 1995-10-03; source msha-controller-operator-history
- **controller_controls_operator:** Noah L  Vandyke → Key West Mining Inc; 1993-06-28 to 1995-10-03; source msha-controller-operator-history
- **operator_operates_mine:** Dominion Coal Corporation → Young'S Br #15; 1995-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sunoco, Inc. → Dominion Coal Corporation; 1995-10-04 to 2012-01-16; source msha-controller-operator-history
- **controller_controls_mine:** SunCoke Energy Incorporated → Young'S Br #15; 2012-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** SunCoke Energy Incorporated → Dominion Coal Corporation; 2012-01-17 to 1993-06-27; source msha-controller-operator-history
- **controller_controls_operator:** SunCoke Energy Incorporated → Dominion Coal Corporation; 2012-01-17 to current/open; source msha-controller-operator-history