# Relationship history for MSHA mine 2902497

Current hierarchy: **David  Davidson → Gulf Coast Mining Group → Iron Duke Mine**

- 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:** Gulf Coast Mining Group, LLC → Iron Duke Mine; 2018-04-02 to 2021-04-21; source msha-controller-operator-history
- **controller_controls_mine:** David  Davidson et al → Iron Duke Mine; 2018-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Davidson et al → Gulf Coast Mining Group, LLC; 2018-04-02 to 2021-04-21; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Lozensky et al → Gulf Coast Mining Group, LLC; 2018-04-02 to 2021-04-21; source msha-controller-operator-history
- **operator_operates_mine:** Gulf Coast Mining Group → Iron Duke Mine; 2021-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David  Davidson → Iron Duke Mine; 2021-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Davidson → Gulf Coast Mining Group; 2021-04-22 to current/open; source msha-controller-operator-history