# Relationship history for MSHA mine 1201729

Current hierarchy: **Wallace Larry → Grandview Dock Corp → Grandview Dock Corp**

- 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:** Grandview Dock Corp → Grandview Dock Corp; 1979-08-01 to 1992-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Smith Fred Jr → Grandview Dock Corp; 1979-08-01 to 1992-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Smith Fred Jr → Grandview Dock Corp; 1979-08-01 to 1992-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Grandview Dock Corp → Grandview Dock Corp; 1992-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wallace Larry → Grandview Dock Corp; 1992-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wallace Larry → Grandview Dock Corp; 1992-06-01 to current/open; source msha-controller-operator-history