# Relationship history for MSHA mine 2602434

Current hierarchy: **Eagle Materials Inc → 3D Concrete LLC → 3D 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** John Davis Trucking Co., Inc. → 3D Pit; 2000-08-01 to 2016-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Shane N  Davis  et al → 3D Pit; 2000-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shane N  Davis  et al → John Davis Trucking Co., Inc.; 2000-08-01 to 2016-03-31; source msha-controller-operator-history
- **controller_controls_operator:** John W  Davis  et al → John Davis Trucking Co., Inc.; 2000-08-01 to 2016-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Shane N  Davis  et al → 3D Pit; 2013-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** 3D Concrete → 3D Pit; 2016-04-01 to 2019-08-02; source msha-controller-operator-history
- **controller_controls_operator:** Shane N  Davis  et al → 3D Concrete; 2016-04-01 to 2019-08-02; source msha-controller-operator-history
- **controller_controls_operator:** John W  Davis  et al → 3D Concrete; 2016-04-01 to 2019-08-02; source msha-controller-operator-history
- **operator_operates_mine:** 3D Concrete LLC → 3D Pit; 2019-08-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eagle Materials Inc → 3D Pit; 2019-08-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eagle Materials Inc → 3D Concrete LLC; 2019-08-03 to current/open; source msha-controller-operator-history