# Relationship history for MSHA mine 0801314

Current hierarchy: **Terra Construction Group Inc → David Barron Land Development, Inc. → Bishop 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

- **operator_operates_mine:** David Barron Land Development, Inc. → Bishop Pit; 2002-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** C David  Barron → Bishop Pit; 2002-06-02 to 2006-08-31; source msha-controller-operator-history
- **controller_controls_operator:** C David  Barron → David Barron Land Development, Inc.; 2002-06-02 to 2006-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Terra Construction Group Inc → Bishop Pit; 2006-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terra Construction Group Inc → David Barron Land Development, Inc.; 2006-09-01 to current/open; source msha-controller-operator-history