# Relationship history for MSHA mine 3002794

Current hierarchy: **Gary L  Weller → Greystone Quarries Inc → Greystone 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:** Jefferson Heights Quarry Inc → Greystone Quarry; 1987-06-01 to 1997-05-19; source msha-controller-operator-history
- **controller_controls_mine:** Tooley Neal → Greystone Quarry; 1987-06-01 to 1997-05-19; source msha-controller-operator-history
- **controller_controls_operator:** Tooley Neal → Jefferson Heights Quarry Inc; 1987-06-01 to 1997-05-19; source msha-controller-operator-history
- **operator_operates_mine:** Rock Brother Contracting → Greystone Quarry; 1997-05-20 to 2001-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Shaw Daryl C → Greystone Quarry; 1997-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shaw Daryl C → Rock Brother Contracting; 1997-05-20 to 2001-07-25; source msha-controller-operator-history
- **operator_operates_mine:** Greystone Quarries Inc → Greystone Quarry; 2001-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary L  Weller et al → Greystone Quarry; 2001-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary L  Weller et al → Greystone Quarries Inc; 2001-07-26 to current/open; source msha-controller-operator-history