# Relationship history for MSHA mine 1600974

Current hierarchy: **Carl  Fornea Jr → Fornea & Sons Trucking → Fornea & Sons Pit #2**

- 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

- **controller_controls_mine:** Spell Mavis M → Fornea & Sons Pit #2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Spell Trucking Inc → Fornea & Sons Pit #2; 1980-01-01 to 1981-11-10; source msha-controller-operator-history
- **controller_controls_operator:** Spell Mavis M → Spell Trucking Inc; 1980-01-01 to 1981-11-10; source msha-controller-operator-history
- **operator_operates_mine:** F & B Sand & Gravel Inc → Fornea & Sons Pit #2; 1981-11-11 to 1988-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Fornea John N Jr → Fornea & Sons Pit #2; 1981-11-11 to 1988-05-18; source msha-controller-operator-history
- **controller_controls_operator:** Fornea John N Jr → F & B Sand & Gravel Inc; 1981-11-11 to 1988-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Carl  Fornea Jr → Fornea & Sons Pit #2; 1987-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fornea & Sons Trucking → Fornea & Sons Pit #2; 1988-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl  Fornea Jr → Fornea & Sons Trucking; 1988-05-19 to current/open; source msha-controller-operator-history