# Relationship history for MSHA mine 4503276

Current hierarchy: **Jason  Gaber etal; Steve  Gaber etal → Diversified Development Company → D D One**

- 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:** Diversified Development Company → D D One; 1992-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lane A  Griffin  et al → D D One; 1992-08-01 to 2020-06-18; source msha-controller-operator-history
- **controller_controls_operator:** Lane A  Griffin  et al → Diversified Development Company; 1992-08-01 to 2020-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Jason  Gaber etal → D D One; 2020-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason  Gaber etal → Diversified Development Company; 2020-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Gaber etal → Diversified Development Company; 2020-06-19 to current/open; source msha-controller-operator-history