# Relationship history for MSHA mine 4406734

Current hierarchy: **SunCoke Energy Incorporated → Dominion Coal Corporation → Jscc No 20**

- 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:** Sunoco, Inc. → Jscc No 20; 1979-10-29 to 2012-01-16; source msha-controller-operator-history
- **controller_controls_mine:** Coy  Taylor et al → Jscc No 20; 1984-10-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dominion Coal Corporation → Jscc No 20; 1993-02-01 to 1993-09-16; source msha-controller-operator-history
- **controller_controls_operator:** Sunoco, Inc. → Dominion Coal Corporation; 1993-02-01 to 1993-09-16; source msha-controller-operator-history
- **operator_operates_mine:** Chad Coal Corp → Jscc No 20; 1993-09-17 to 1995-08-08; source msha-controller-operator-history
- **controller_controls_operator:** Coy  Taylor et al → Chad Coal Corp; 1993-09-17 to 1995-08-08; source msha-controller-operator-history
- **controller_controls_operator:** James  Taylor et al → Chad Coal Corp; 1993-09-17 to 1995-08-08; source msha-controller-operator-history
- **operator_operates_mine:** Dominion Coal Corporation → Jscc No 20; 1995-08-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sunoco, Inc. → Dominion Coal Corporation; 1995-08-09 to 2012-01-16; source msha-controller-operator-history
- **controller_controls_mine:** SunCoke Energy Incorporated → Jscc No 20; 2012-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** SunCoke Energy Incorporated → Dominion Coal Corporation; 2012-01-17 to 1993-09-16; 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