# Relationship history for MSHA mine 3401722

Current hierarchy: **Tim  Keen → Tim Keen → TIM KEEN STONE PITT #1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Brent  Quisenberry et al → TIM KEEN STONE PITT #1; 1986-01-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rock Island Stone Company Inc → TIM KEEN STONE PITT #1; 1990-06-01 to 1993-03-09; source msha-controller-operator-history
- **controller_controls_operator:** Brent  Quisenberry et al → Rock Island Stone Company Inc; 1990-06-01 to 1993-03-09; source msha-controller-operator-history
- **operator_operates_mine:** Circle G → TIM KEEN STONE PITT #1; 1993-03-10 to 1997-03-11; source msha-controller-operator-history
- **controller_controls_mine:** Gary  Gillham → TIM KEEN STONE PITT #1; 1993-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Gillham → Circle G; 1993-03-10 to 1997-03-11; source msha-controller-operator-history
- **operator_operates_mine:** Tim Keen → TIM KEEN STONE PITT #1; 1997-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tim  Keen → TIM KEEN STONE PITT #1; 1997-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Keen → Tim Keen; 1997-03-12 to current/open; source msha-controller-operator-history