# Relationship history for MSHA mine 2200640

Current hierarchy: **John  Gaston; Robert  Gaston → Gaston Brothers Inc → GASTON BROS. LIME PLANT**

- 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:** Wayne County Lime Company → GASTON BROS. LIME PLANT; 1992-05-01 to 1992-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Willie C  Revette → GASTON BROS. LIME PLANT; 1992-05-01 to 1992-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Willie C  Revette → Wayne County Lime Company; 1992-05-01 to 1992-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Wayne County Lime Company → GASTON BROS. LIME PLANT; 1992-10-01 to 1995-03-16; source msha-controller-operator-history
- **controller_controls_mine:** Curtis  Morris → GASTON BROS. LIME PLANT; 1992-10-01 to 1995-03-16; source msha-controller-operator-history
- **controller_controls_operator:** Curtis  Morris → Wayne County Lime Company; 1992-10-01 to 1995-03-16; source msha-controller-operator-history
- **operator_operates_mine:** Farmer'S Lime Company Inc → GASTON BROS. LIME PLANT; 1995-03-17 to 1997-11-04; source msha-controller-operator-history
- **controller_controls_mine:** Leon  Farmer → GASTON BROS. LIME PLANT; 1995-03-17 to 1997-11-04; source msha-controller-operator-history
- **controller_controls_operator:** Leon  Farmer → Farmer'S Lime Company Inc; 1995-03-17 to 1997-11-04; source msha-controller-operator-history
- **operator_operates_mine:** Gaston Brothers Inc → GASTON BROS. LIME PLANT; 1997-11-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  Gaston  et al → GASTON BROS. LIME PLANT; 1997-11-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Gaston  et al → Gaston Brothers Inc; 1997-11-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Gaston  et al → Gaston Brothers Inc; 1997-11-05 to current/open; source msha-controller-operator-history