Simplify the following text for a Grade 4 native English-speaking person.
Original: It is located on the River Wye , close to its confluence with the River Severn , and close to the western end of the Severn Bridge on the M48 motorway .
Simplified: It is built beside the River Wye , close to where it joins with the River Severn . It is near the western end of the Severn Bridge on the M48 motorway .