# Relationship history for MSHA mine 3400610

Current hierarchy: **Kelly  Goddard → Goddard Concrete Company Inc-Sand Div → Jones Facility**

- 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:** Sand Products Corp → Jones Facility; 1950-01-01 to 1979-05-09; source msha-controller-operator-history
- **controller_controls_mine:** Katherine  Stanford → Jones Facility; 1950-01-01 to 1979-06-12; source msha-controller-operator-history
- **controller_controls_operator:** Katherine  Stanford → Sand Products Corp; 1950-01-01 to 1979-05-09; source msha-controller-operator-history
- **operator_operates_mine:** Goddard Concrete Company Inc-Sand Div → Jones Facility; 1979-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kelly  Goddard → Jones Facility; 1979-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kelly  Goddard → Goddard Concrete Company Inc-Sand Div; 1979-05-10 to current/open; source msha-controller-operator-history