# Relationship history for MSHA mine 3002713

Current hierarchy: **Scolaro Mario A → Super Sand & Gravel Inc → Super Sand & Gravel Incorporated**

- 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:** F & M Construction Inc → Super Sand & Gravel Incorporated; 1986-03-01 to 1987-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Quitadamo Frank → Super Sand & Gravel Incorporated; 1986-03-01 to 1987-04-06; source msha-controller-operator-history
- **controller_controls_operator:** Quitadamo Frank → F & M Construction Inc; 1986-03-01 to 1987-04-06; source msha-controller-operator-history
- **operator_operates_mine:** Super Sand & Gravel Inc → Super Sand & Gravel Incorporated; 1987-04-07 to 1992-05-06; source msha-controller-operator-history
- **controller_controls_mine:** Bernardini Mario → Super Sand & Gravel Incorporated; 1987-04-07 to 1992-05-06; source msha-controller-operator-history
- **controller_controls_operator:** Bernardini Mario → Super Sand & Gravel Inc; 1987-04-07 to 1992-05-06; source msha-controller-operator-history
- **operator_operates_mine:** Super Sand & Gravel Inc → Super Sand & Gravel Incorporated; 1992-05-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Scolaro Mario A → Super Sand & Gravel Incorporated; 1992-05-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scolaro Mario A → Super Sand & Gravel Inc; 1992-05-07 to current/open; source msha-controller-operator-history