# Relationship history for MSHA mine 5002033

Current hierarchy: **Dean L  Rehbein; Marvin A  Rehbein → Cripple Creek Mining Inc → Bird 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Northern Exploration & Logistics LLC → Bird Creek; 2015-03-01 to 2016-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Douglas B Grey → Bird Creek; 2015-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas B Grey → Northern Exploration & Logistics LLC; 2015-03-01 to 2016-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Cripple Creek Mining Inc → Bird Creek; 2016-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Marvin A  Rehbein et al → Bird Creek; 2016-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marvin A  Rehbein et al → Cripple Creek Mining Inc; 2016-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dean L  Rehbein et al → Cripple Creek Mining Inc; 2016-07-01 to current/open; source msha-controller-operator-history