# Relationship history for MSHA mine 0401920

Current hierarchy: **Granite Construction Inc → Granite Construction Co → Graham Pit & 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

- **controller_controls_mine:** Granite Construction Inc → Graham Pit & Mill; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Redwood Empire Aggregates → Graham Pit & Mill; 1950-01-01 to 2000-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Robert J  King → Graham Pit & Mill; 1950-01-01 to 2000-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Robert J  King → Redwood Empire Aggregates; 1950-01-01 to 2000-12-31; source msha-controller-operator-history
- **controller_controls_mine:** C Dean  Rasmussen → Graham Pit & Mill; 1995-07-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Parnum Paving → Graham Pit & Mill; 2001-01-01 to 2002-05-31; source msha-controller-operator-history
- **controller_controls_operator:** C Dean  Rasmussen → Parnum Paving; 2001-01-01 to 2002-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Granite Construction Co → Graham Pit & Mill; 2002-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Granite Construction Inc → Granite Construction Co; 2002-06-01 to current/open; source msha-controller-operator-history