# Relationship history for MSHA mine 4102814

Current hierarchy: **Weakly Harold F → Solution Engineering Inc → Falls City Plant**

- 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:** Solution Engineering Inc → Falls City Plant; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Weakly Harold F Et Al → Falls City Plant; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Weakly Harold F Et Al → Solution Engineering Inc; 1979-01-01 to current/open; source msha-controller-operator-history