# Relationship history for MSHA mine 4400057

Current hierarchy: **Long A Frank → Long Enterprises → Jamison Black Marble**

- 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:** Black Marble Stone Co-Div/Frazier Quarry Inc → Jamison Black Marble; 1950-01-01 to 1979-12-26; source msha-controller-operator-history
- **controller_controls_mine:** Frazier Quarry Inc → Jamison Black Marble; 1950-01-01 to 1979-12-26; source msha-controller-operator-history
- **controller_controls_operator:** Frazier Quarry Inc → Black Marble Stone Co-Div/Frazier Quarry Inc; 1950-01-01 to 1979-12-26; source msha-controller-operator-history
- **operator_operates_mine:** Long Enterprises → Jamison Black Marble; 1979-12-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Long A Frank → Jamison Black Marble; 1979-12-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Long A Frank → Long Enterprises; 1979-12-27 to current/open; source msha-controller-operator-history