I see that Google maps has some excellent close-up pictures via Street View (or, River View, perhaps?), should anybody be tempted to model the viaduct.
https://www.google.com/maps/@53.2685165,-8.0402137,3a,72.2y,132.46h,94.58t/data=!3m6!1e1!3m4!1sk-T_DN_zJuA8-wnf2QF2lg!2e0!7i13312!8i6656