# Relationship history for MSHA mine 4300417

Current hierarchy: **Douglas R  Casella → CASELLA CONSTRUCTION  INC. → CLARENDON  QUARRY**

- 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:** Roger  Rowe → CLARENDON  QUARRY; 1985-03-01 to 1999-08-09; source msha-controller-operator-history
- **operator_operates_mine:** Rowe Sand & Gravel → CLARENDON  QUARRY; 1987-09-01 to 1996-10-21; source msha-controller-operator-history
- **controller_controls_operator:** Roger  Rowe → Rowe Sand & Gravel; 1987-09-01 to 1996-10-21; source msha-controller-operator-history
- **operator_operates_mine:** Sundown Sand & Gravel Inc → CLARENDON  QUARRY; 1996-10-22 to 1998-02-23; source msha-controller-operator-history
- **controller_controls_mine:** David  Wisell → CLARENDON  QUARRY; 1996-10-22 to 1998-02-23; source msha-controller-operator-history
- **controller_controls_operator:** David  Wisell → Sundown Sand & Gravel Inc; 1996-10-22 to 1998-02-23; source msha-controller-operator-history
- **operator_operates_mine:** Rowe Sand & Gravel → CLARENDON  QUARRY; 1998-02-24 to 1999-07-18; source msha-controller-operator-history
- **controller_controls_operator:** Roger  Rowe → Rowe Sand & Gravel; 1998-02-24 to 1999-07-18; source msha-controller-operator-history
- **controller_controls_mine:** Douglas R  Casella → CLARENDON  QUARRY; 1998-06-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Casella Construction  Inc. → CLARENDON  QUARRY; 1999-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas R  Casella → Casella Construction  Inc.; 1999-07-19 to current/open; source msha-controller-operator-history