Simplify the following text for a Grade 6 native English-speaking person.
Original: The Ottauquechee River ( pronounced AWT-ah-KWEE-chee ) is a river , about 40 miles ( 65 km ) long , in eastern Vermont in the United States .
Simplified: The Ottauquechee River is a river in Vermont , in the eastern United States . It is a tributary to the Connecticut River , and is about 40 m long .