# Relationship history for MSHA mine 2301434

Current hierarchy: **Wells Ed → Wells Quarries Inc → Wells Quarry**

- 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:** Mollohan Quarries → Wells Quarry; 1950-01-01 to 1978-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Mollohan Quarries → Wells Quarry; 1950-01-01 to 1978-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Mollohan Quarries → Mollohan Quarries; 1950-01-01 to 1978-07-14; source msha-controller-operator-history
- **operator_operates_mine:** Wells Quarries Inc → Wells Quarry; 1978-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wells Ed → Wells Quarry; 1978-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wells Ed → Wells Quarries Inc; 1978-07-15 to current/open; source msha-controller-operator-history