# Relationship history for MSHA mine 3100427

Current hierarchy: **Jeffrey  Goodman → B V Hedrick Gravel & Sand Co → Grove Stone 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:** Grove Stone & Sand Company → Grove Stone Quarry; 1950-01-01 to 2003-04-22; source msha-controller-operator-history
- **controller_controls_mine:** Jeffrey  Goodman et al → Grove Stone Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey  Goodman et al → Grove Stone & Sand Company; 1950-01-01 to 2003-04-22; source msha-controller-operator-history
- **operator_operates_mine:** B V Hedrick Gravel & Sand Co → Grove Stone Quarry; 2003-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey  Goodman et al → B V Hedrick Gravel & Sand Co; 2003-04-23 to current/open; source msha-controller-operator-history