Lets look closer at the development of Elgin bridge that was originally known as 'Thompson" when a wooden drawbridge, constructed in 1823. A more sturdy effort was erected in 1850 (?) which then was replaced in 1926 (completion) by the Elgin bridge we know today. it was subject to superficial changes, and road widening, but looks much the same as we know it today.
So here are some photos to illustrate this development.