# Relationship history for MSHA mine 4407058

Current hierarchy: **SunCoke Energy Incorporated → Jewell Smokeless Coal Corporation → Heavy Equipment Shop**

- 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. → Heavy Equipment Shop; 1979-10-17 to 2012-01-16; source msha-controller-operator-history
- **operator_operates_mine:** Jewell Smokeless Coal Corporation → Heavy Equipment Shop; 2002-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sunoco, Inc. → Jewell Smokeless Coal Corporation; 2002-09-10 to 2012-01-16; source msha-controller-operator-history
- **controller_controls_mine:** SunCoke Energy Incorporated → Heavy Equipment Shop; 2012-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** SunCoke Energy Incorporated → Jewell Smokeless Coal Corporation; 2012-01-17 to current/open; source msha-controller-operator-history