# Relationship history for MSHA mine 2000811

Current hierarchy: **RR Holdco, Inc. → Rieth-Riley Construction Co., Inc. → KASSON SAND & GRAVEL**

- 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

- **controller_controls_mine:** Rieth-Riley Construction Company Inc → KASSON SAND & GRAVEL; 1950-01-01 to 2025-01-30; source msha-controller-operator-history
- **operator_operates_mine:** Peninsula Asphalt Corp → KASSON SAND & GRAVEL; 1950-01-01 to 1983-02-24; source msha-controller-operator-history
- **controller_controls_mine:** M Logan Wysong Company → KASSON SAND & GRAVEL; 1950-01-01 to 1990-05-29; source msha-controller-operator-history
- **controller_controls_operator:** M Logan Wysong Company → Peninsula Asphalt Corp; 1950-01-01 to 1983-02-24; source msha-controller-operator-history
- **operator_operates_mine:** Kasson Sand & Gravel Company → KASSON SAND & GRAVEL; 1983-02-25 to 2016-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Robert W  Noonan et al → KASSON SAND & GRAVEL; 1983-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert W  Noonan et al → Kasson Sand & Gravel Company; 1983-02-25 to 2016-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Rieth-Riley Construction Co., Inc. → KASSON SAND & GRAVEL; 2016-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rieth-Riley Construction Company Inc → Rieth-Riley Construction Co., Inc.; 2016-07-01 to 2025-01-30; source msha-controller-operator-history
- **controller_controls_mine:** RR Holdco, Inc. → KASSON SAND & GRAVEL; 2025-01-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** RR Holdco, Inc. → Rieth-Riley Construction Co., Inc.; 2025-01-31 to current/open; source msha-controller-operator-history