Complex sentence: No firefighting dry or wet standpipes were designed for the eastern span replacement, although, the firefighting wet standpipes do exist on the original western suspension span visible on both the north-side upper and lower decks.
Split into simpler sentences: No firefighting dry or wet standpipes were designed for the eastern span replacement. Although, the firefighting wet standpipes do exist on the original western suspension span visible on both the north-side upper and lower decks.