# Relationship history for MSHA mine 3303891

Current hierarchy: **Potter Robert E → Eastern Fuel Services Inc → King #1 Tipple**

- 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:** Rayburn Excavating Inc → King #1 Tipple; 1981-12-01 to 1982-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Rayburn Wayne D → King #1 Tipple; 1981-12-01 to 1982-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Rayburn Wayne D → Rayburn Excavating Inc; 1981-12-01 to 1982-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Eastern Fuel Services Inc → King #1 Tipple; 1982-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Potter Robert E → King #1 Tipple; 1982-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Potter Robert E → Eastern Fuel Services Inc; 1982-02-01 to current/open; source msha-controller-operator-history