Complex sentence: At Ridgecrest, US70 merges with I-40 (exit65); at Swannanoa Gap, it crosses the Eastern Continental Divide (elevation) and enters McDowell County.
Split into simpler sentences: At Ridgecrest, US70 merges with I-40 (exit65). At Swannanoa Gap it crosses the Eastern Continental Divide (elevation) and enters McDowell County.