Simplify the following text for a Grade 6 native English-speaking person.
Original: In 1980 the United States Congress designated 110 m of the river downstream from Walker Lake as the Kobuk Wild and Scenic River as part of the National Wild and Scenic Rivers System .
Simplified: In 1980 , 110 miles ( 177 km ) of the river were deemed the Kobuk WIld and Scenic River .