# Relationship history for MSHA mine 4502602

Current hierarchy: **A & B Asphalt Inc → Country Gals Asphalt Inc → Anderson Pit & Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Sunnyside Asphalt Paving Company → Anderson Pit & Plant; 1978-12-01 to 1980-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Dalke Leo → Anderson Pit & Plant; 1978-12-01 to 1980-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Dalke Leo → Sunnyside Asphalt Paving Company; 1978-12-01 to 1980-07-14; source msha-controller-operator-history
- **operator_operates_mine:** Country Gals Asphalt Inc → Anderson Pit & Plant; 1980-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** A & B Asphalt Inc → Anderson Pit & Plant; 1980-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** A & B Asphalt Inc → Country Gals Asphalt Inc; 1980-07-15 to current/open; source msha-controller-operator-history