Complex sentence: It is the second longest floating bridge in the world at, whereas the longest is the Evergreen Point Floating Bridge just a few miles to the north on the same lake, built 23 years later.
Split into simpler sentences: It is the second longest floating bridge in the world, at. The longest, incidentally, is the Evergreen Point Floating Bridge just a few miles to the north on the same lake, built 23 years later.