# Relationship history for MSHA mine 0103189

Current hierarchy: **Eugene F  Morton → M&B Excavating Co., LLC → Gorgas Pond Project**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** M&B Excavating Co., LLC → Gorgas Pond Project; 2000-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eugene F  Morton → Gorgas Pond Project; 2000-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eugene F  Morton → M&B Excavating Co., LLC; 2000-06-01 to current/open; source msha-controller-operator-history