# Relationship history for MSHA mine 3401455

Current hierarchy: **Dolese Brothers Company → Dolese Bros Co → Roosevelt Quarry**

- 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:** Dolese Brothers Company → Roosevelt Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Duane'S Granite Pit → Roosevelt Quarry; 1984-05-01 to 1991-10-14; source msha-controller-operator-history
- **controller_controls_mine:** Thomas D  Caward → Roosevelt Quarry; 1984-05-01 to 1991-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Thomas D  Caward → Duane'S Granite Pit; 1984-05-01 to 1991-10-14; source msha-controller-operator-history
- **controller_controls_mine:** Robert C  Thomson → Roosevelt Quarry; 1988-07-01 to 1993-12-06; source msha-controller-operator-history
- **operator_operates_mine:** Aggregate Materials → Roosevelt Quarry; 1991-10-15 to 1993-12-06; source msha-controller-operator-history
- **controller_controls_operator:** Robert C  Thomson → Aggregate Materials; 1991-10-15 to 1993-12-06; source msha-controller-operator-history
- **operator_operates_mine:** Dolese Bros Co → Roosevelt Quarry; 1993-12-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dolese Brothers Company → Dolese Bros Co; 1993-12-07 to current/open; source msha-controller-operator-history