# Relationship history for MSHA mine 2601066

Current hierarchy: **Efrain Rene  Morales Moreno → Wulfenstein Construction Company Inc → Calvada Pit And Mill**

- 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:** Wulfenstein Construction Company Inc → Calvada Pit And Mill; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ray  Wulfenstein → Calvada Pit And Mill; 1950-01-01 to 2018-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Ray  Wulfenstein → Wulfenstein Construction Company Inc; 1950-01-01 to 2018-03-31; source msha-controller-operator-history
- **controller_controls_mine:** PRS Holdings, Inc → Calvada Pit And Mill; 2018-04-01 to 2026-06-01; source msha-controller-operator-history
- **controller_controls_operator:** PRS Holdings, Inc → Wulfenstein Construction Company Inc; 2018-04-01 to 2026-06-01; source msha-controller-operator-history
- **controller_controls_mine:** Efrain Rene  Morales Moreno → Calvada Pit And Mill; 2026-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Efrain Rene  Morales Moreno → Wulfenstein Construction Company Inc; 2026-06-02 to current/open; source msha-controller-operator-history