# Relationship history for MSHA mine 2103866

Current hierarchy: **Mike  McNamara → McNamara Contracting Inc → Berg's Pit**

- 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

- **controller_controls_mine:** Kevin  McNamara → Berg's Pit; 1950-01-01 to 2014-08-05; source msha-controller-operator-history
- **controller_controls_mine:** Mike  McNamara → Berg's Pit; 2014-08-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** McNamara Contracting Inc → Berg's Pit; 2015-08-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike  McNamara → McNamara Contracting Inc; 2015-08-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin  McNamara → McNamara Contracting Inc; 2015-08-19 to 2014-08-05; source msha-controller-operator-history