It is interesting that you kept the color above the gate? Why is that so since you basically changed the whole picture to sepia tones. unless you intention is to grab someone's eye to the different color tone?
The first 4 photos were really taken very well, especially the shot with the 45 degree lines under the bridge. Maybe a few of my personnel comments. For the flower shot, although the intention is to create a soft feel to the photo, maybe the crispness of the center batch of flowers would have added some stronger lines to the photo, giving it more depth and feel.
For the Anderson Bridge shot, I just wonder what the feel would be like if the photo was really centered straight down the middle, as yours is captured slightly off to the left. It might have been better, but I might be wrong.
Great frames and Great combination of colour and sepia. Hope to see more of your photos.
Cheers,
Tantor