# Relationship history for MSHA mine 3101228

Current hierarchy: **Vogler Bill → Bill Vogler Sand Company → Forsyth County Mines**

- 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:** Hoyle Williams Paving & Sand Company → Forsyth County Mines; 1950-01-01 to 1978-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Williams Hoyle Paving & Sand Company → Forsyth County Mines; 1950-01-01 to 1978-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Williams Hoyle Paving & Sand Company → Hoyle Williams Paving & Sand Company; 1950-01-01 to 1978-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Bill Vogler Sand Company → Forsyth County Mines; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vogler Bill → Forsyth County Mines; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vogler Bill → Bill Vogler Sand Company; 1979-01-01 to current/open; source msha-controller-operator-history