# Relationship history for MSHA mine 1401677

Current hierarchy: **Brian D  Wells → Wells Construction → Wells Construction**

- 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:** Wells Construction → Wells Construction; 2007-08-31 to 2011-09-21; source msha-controller-operator-history
- **controller_controls_mine:** Brian D  Wells → Wells Construction; 2007-08-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian D  Wells → Wells Construction; 2007-08-31 to 2011-09-21; source msha-controller-operator-history
- **operator_operates_mine:** Wells Construction → Wells Construction; 2011-09-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brian D  Wells → Wells Construction; 2011-09-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian D  Wells → Wells Construction; 2011-09-22 to current/open; source msha-controller-operator-history