# Relationship history for MSHA mine 2002746

Current hierarchy: **Robert W  Noonan → Kasson Sand & Gravel Company → KASSON PLANT #2**

- 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

- **controller_controls_mine:** M Logan Wysong Company → KASSON PLANT #2; 1950-01-01 to 1990-05-29; source msha-controller-operator-history
- **controller_controls_mine:** Robert W  Noonan et al → KASSON PLANT #2; 1983-02-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Peninsula Asphalt Corp → KASSON PLANT #2; 1986-04-01 to 1990-05-29; source msha-controller-operator-history
- **controller_controls_operator:** M Logan Wysong Company → Peninsula Asphalt Corp; 1986-04-01 to 1990-05-29; source msha-controller-operator-history
- **operator_operates_mine:** Cornillie Peninsula Concrete → KASSON PLANT #2; 1990-05-30 to 1992-04-15; source msha-controller-operator-history
- **controller_controls_mine:** Richard A  Deneweth → KASSON PLANT #2; 1990-05-30 to 1992-04-15; source msha-controller-operator-history
- **controller_controls_operator:** Richard A  Deneweth → Cornillie Peninsula Concrete; 1990-05-30 to 1992-04-15; source msha-controller-operator-history
- **operator_operates_mine:** Kasson Sand & Gravel Company → KASSON PLANT #2; 1992-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert W  Noonan et al → Kasson Sand & Gravel Company; 1992-04-16 to current/open; source msha-controller-operator-history