What part of the country are you in? Any frost/ice/spring floods? Would love to build something like that but too timid.....
I really hate to be a wet blanket. Where did you come up with the design? Just because it "looks good", it dose not follow that it will not collapse. I will not offer how I would do it, because bridge building is way out of my field.
Nice looking bridge. I was looking at the picture of tyour tractor and wondered, where are the headlights?
The second set of photos you posted really show how sturdy this bridge is. I believe you will have no problem driving your tractor across it.How much time do you have vested in this project?
Well Buggyman,...I too am ignorant of bridge-building skills,....but IMHO I'd say you did a darn nice job of it. Sounds like you're deep enough for footings in KY and structurally sound enough for your own needs.
Nice design and just about what I need over the main inlet to my lake (pond), but I might just be tempted to increase the 4 x 4's to 6 x 6's for my 3520 Cab with a 73" bucket (clay, gravel etc, heavy),.....But I'm thinking out loud here and only meant to compliment you on a nice job,..your girlfriend gets a hand also for her fine input !!!
CHEERS !
. . . tug