# Relationship history for MSHA mine 3100246

Current hierarchy: **Robert Jefferson  McKinney → Jacob'S Creek Stone Company Inc → VADEN 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

- **controller_controls_mine:** Robert Jefferson  McKinney → VADEN QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Vaden Stone Works → VADEN QUARRY; 1950-01-01 to 1981-09-30; source msha-controller-operator-history
- **controller_controls_mine:** W L  Vaden → VADEN QUARRY; 1950-01-01 to 2001-01-25; source msha-controller-operator-history
- **controller_controls_operator:** W L  Vaden → Vaden Stone Works; 1950-01-01 to 1981-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Jacob'S Creek Stone Company Inc → VADEN QUARRY; 1981-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert Jefferson  McKinney → Jacob'S Creek Stone Company Inc; 1981-10-01 to current/open; source msha-controller-operator-history