# Relationship history for MSHA mine 1511417

Current hierarchy: **John  Harris → Roadside Processing Inc → Roadside Processing Inc**

- 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 → Roadside Processing Inc; 1975-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Greenwood Land & Mining Company Inc → Roadside Processing Inc; 1978-07-01 to 1979-10-31; source msha-controller-operator-history
- **controller_controls_operator:** B Ray  Thompson → Greenwood Land & Mining Company Inc; 1978-07-01 to 1979-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Shamrock Coal Company Inc → Roadside Processing Inc; 1979-11-01 to 1992-10-07; source msha-controller-operator-history
- **controller_controls_mine:** Sunoco, Inc. → Roadside Processing Inc; 1979-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sunoco, Inc. → Shamrock Coal Company Inc; 1979-11-01 to 1992-10-07; source msha-controller-operator-history
- **operator_operates_mine:** Roadside Processing Inc → Roadside Processing Inc; 1992-10-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  Harris → Roadside Processing Inc; 1992-10-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Harris → Roadside Processing Inc; 1992-10-08 to current/open; source msha-controller-operator-history