# Relationship history for MSHA mine 1601153

Current hierarchy: **Gulotta Brent → Brent'S Sand & Gravel → BRENT'S S & G**

- 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:** Herb'S Sand & Gravel → BRENT'S S & G; 1988-01-01 to 1991-02-06; source msha-controller-operator-history
- **controller_controls_mine:** Anthony Herbert → BRENT'S S & G; 1988-01-01 to 1991-02-06; source msha-controller-operator-history
- **controller_controls_operator:** Anthony Herbert → Herb'S Sand & Gravel; 1988-01-01 to 1991-02-06; source msha-controller-operator-history
- **operator_operates_mine:** J & M Sand & Gravel → BRENT'S S & G; 1991-02-07 to 1992-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Buckels Moses → BRENT'S S & G; 1991-02-07 to 1992-05-14; source msha-controller-operator-history
- **controller_controls_operator:** Buckels Moses → J & M Sand & Gravel; 1991-02-07 to 1992-05-14; source msha-controller-operator-history
- **operator_operates_mine:** Brent'S Sand & Gravel → BRENT'S S & G; 1992-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gulotta Brent → BRENT'S S & G; 1992-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gulotta Brent → Brent'S Sand & Gravel; 1992-05-15 to current/open; source msha-controller-operator-history