The first one looks a tad overexposed but I like the balanced composition. Second is very nice but might be improved if the background were more out of focus: use a wider aperture to lessen the depth of field and separate it from the stalks of grass in the foreground. The third one kept my interest just long enough to figure out what it is becasue the composition is good and the patterns are interesting, tho I quickly dismissed it becasue I have no interest in dirty bridge underpinnings, but thats just me. The last one has interesting patterns also but I think the bridge in the background could be cropped out to emphasize the subject and eliminate clutter, and it looks like the pic needs to be leveled. I hope this is helpful. JSD