# Relationship history for MSHA mine 3502787

Current hierarchy: **Steve  Bennett; Verne  Smith → Yamco Rock Llc → RENNE 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

- **operator_operates_mine:** Robert Osborn Trucking → RENNE QUARRY; 1950-01-01 to 1979-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Osborn Robert → RENNE QUARRY; 1950-01-01 to 1979-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Osborn Robert → Robert Osborn Trucking; 1950-01-01 to 1979-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Bi City Rock Products → RENNE QUARRY; 1979-02-01 to 1987-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Taylor Keith → RENNE QUARRY; 1979-02-01 to 1987-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Taylor Keith → Bi City Rock Products; 1979-02-01 to 1987-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Quadco Construction Inc → RENNE QUARRY; 1987-04-01 to 1990-12-16; source msha-controller-operator-history
- **controller_controls_mine:** Houck James E → RENNE QUARRY; 1987-04-01 to 1990-12-16; source msha-controller-operator-history
- **controller_controls_operator:** Houck James E → Quadco Construction Inc; 1987-04-01 to 1990-12-16; source msha-controller-operator-history
- **operator_operates_mine:** Keizer Paving & Grading → RENNE QUARRY; 1990-12-17 to 1992-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Vego Greg → RENNE QUARRY; 1990-12-17 to 1992-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Vego Greg → Keizer Paving & Grading; 1990-12-17 to 1992-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Fernwood Quarry → RENNE QUARRY; 1992-10-01 to 2000-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Alberts Cecil R (Mike) → RENNE QUARRY; 1992-10-01 to 2000-08-27; source msha-controller-operator-history
- **controller_controls_operator:** Alberts Cecil R (Mike) → Fernwood Quarry; 1992-10-01 to 2000-08-27; source msha-controller-operator-history
- **operator_operates_mine:** Yamco Rock Llc → RENNE QUARRY; 2000-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Verne  Smith et al → RENNE QUARRY; 2000-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Verne  Smith et al → Yamco Rock Llc; 2000-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Bennett et al → Yamco Rock Llc; 2000-08-28 to current/open; source msha-controller-operator-history