# Relationship history for MSHA mine 4700791

Current hierarchy: **Roger L  Wagner → Lake Ellen Stone, Inc. → Lake Ellen Stone, Inc.**

- 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:** Perronne Industries Inc → Lake Ellen Stone, Inc.; 1950-01-01 to 1989-03-05; source msha-controller-operator-history
- **controller_controls_mine:** Emil  Perronne → Lake Ellen Stone, Inc.; 1950-01-01 to 1989-03-05; source msha-controller-operator-history
- **controller_controls_operator:** Emil  Perronne → Perronne Industries Inc; 1950-01-01 to 1989-03-05; source msha-controller-operator-history
- **operator_operates_mine:** Cascade Ready Mix Inc → Lake Ellen Stone, Inc.; 1989-03-06 to 1992-07-07; source msha-controller-operator-history
- **controller_controls_mine:** James C  Kaiser → Lake Ellen Stone, Inc.; 1989-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James C  Kaiser → Cascade Ready Mix Inc; 1989-03-06 to 1992-07-07; source msha-controller-operator-history
- **operator_operates_mine:** Lake Ellen Stone Incorporated → Lake Ellen Stone, Inc.; 1992-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roger L  Wagner → Lake Ellen Stone, Inc.; 1992-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger L  Wagner → Lake Ellen Stone Incorporated; 1992-07-08 to current/open; source msha-controller-operator-history