# Relationship history for MSHA mine 3605666

Current hierarchy: **Gerald  Fulkroad → Jay Fulkroad & Sons Inc → FULKROAD 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:** D E Smith Inc → FULKROAD QUARRY; 1950-01-01 to 1986-02-10; source msha-controller-operator-history
- **controller_controls_mine:** Joseph L  Angelo Jr → FULKROAD QUARRY; 1950-01-01 to 1986-02-10; source msha-controller-operator-history
- **controller_controls_operator:** Joseph L  Angelo Jr → D E Smith Inc; 1950-01-01 to 1986-02-10; source msha-controller-operator-history
- **operator_operates_mine:** Jay Fulkroad & Sons Inc → FULKROAD QUARRY; 1986-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gerald  Fulkroad → FULKROAD QUARRY; 1986-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gerald  Fulkroad → Jay Fulkroad & Sons Inc; 1986-02-11 to current/open; source msha-controller-operator-history