# Relationship history for MSHA mine 5001440

Current hierarchy: **Floyd L  Ehmann; Sharon M  Ehmann → Dry Creek Valley LLC → Gold Run Creek**

- 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:** Hansen Gold → Gold Run Creek; 1982-08-01 to 2012-02-14; source msha-controller-operator-history
- **controller_controls_mine:** James H  Hansen → Gold Run Creek; 1982-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James H  Hansen → Hansen Gold; 1982-08-01 to 2012-02-14; source msha-controller-operator-history
- **operator_operates_mine:** Dry Creek Valley LLC → Gold Run Creek; 2012-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Floyd L  Ehmann et al → Gold Run Creek; 2012-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Floyd L  Ehmann et al → Dry Creek Valley LLC; 2012-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sharon M  Ehmann et al → Dry Creek Valley LLC; 2012-02-15 to current/open; source msha-controller-operator-history