# Relationship history for MSHA mine 0102562

Current hierarchy: **Dal Porto Sam-H F Harvey & James M Jordan → Tuskegee Sand & Gravel Inc → Franklin Pit**

- 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:** Tuskegee Sand & Gravel Inc → Franklin Pit; 1983-06-01 to 1983-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Dal Porto Sam & H F Harvey → Franklin Pit; 1983-06-01 to 1983-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Dal Porto Sam & H F Harvey → Tuskegee Sand & Gravel Inc; 1983-06-01 to 1983-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Tuskegee Sand & Gravel Inc → Franklin Pit; 1983-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dal Porto Sam-H F Harvey & James M Jordan → Franklin Pit; 1983-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dal Porto Sam-H F Harvey & James M Jordan → Tuskegee Sand & Gravel Inc; 1983-11-01 to current/open; source msha-controller-operator-history