# Relationship history for MSHA mine 3002730

Current hierarchy: **Keith  Grimes → Sagaponack Sand & Gravel Corp → SAGAPONACK SAND & GRAVEL CORP.**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** John B  Tintle → SAGAPONACK SAND & GRAVEL CORP.; 1985-02-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wainscott Sand & Gravel Corp → SAGAPONACK SAND & GRAVEL CORP.; 1986-05-01 to 1988-06-19; source msha-controller-operator-history
- **controller_controls_operator:** John B  Tintle → Wainscott Sand & Gravel Corp; 1986-05-01 to 1988-06-19; source msha-controller-operator-history
- **operator_operates_mine:** Sagaponack Sand & Gravel Corp → SAGAPONACK SAND & GRAVEL CORP.; 1988-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Keith  Grimes → SAGAPONACK SAND & GRAVEL CORP.; 1988-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith  Grimes → Sagaponack Sand & Gravel Corp; 1988-06-20 to current/open; source msha-controller-operator-history