# Relationship history for MSHA mine 3606879

Current hierarchy: **Blaine E  Forbes → Neshannock Sand & Gravel Inc → REDMOND 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Grady W  Cooper → REDMOND PIT; 1950-01-01 to 1985-09-16; source msha-controller-operator-history
- **operator_operates_mine:** Cooper Brothers Inc → REDMOND PIT; 1979-01-01 to 1985-09-16; source msha-controller-operator-history
- **controller_controls_operator:** Grady W  Cooper → Cooper Brothers Inc; 1979-01-01 to 1985-09-16; source msha-controller-operator-history
- **operator_operates_mine:** Cooper Brothers Inc → REDMOND PIT; 1985-09-17 to 1998-09-09; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Santone → REDMOND PIT; 1985-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Santone → Cooper Brothers Inc; 1985-09-17 to 1998-09-09; source msha-controller-operator-history
- **controller_controls_mine:** Blaine E  Forbes et al → REDMOND PIT; 1989-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Neshannock Sand & Gravel Inc → REDMOND PIT; 1998-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blaine E  Forbes et al → Neshannock Sand & Gravel Inc; 1998-09-10 to current/open; source msha-controller-operator-history