Really nice work, as a club we are allowed to do repairs on engineered bridges on our trails if they are only small like a bridge rail, decking, to get away from political involvement from are lands and forest Dept a bridge like the one in your pictures would be called a water crossing and would not have to be designed by a engineer which costs us big bucks, one of our main trails is a railway bed that was built back in the 60's but never was used, all the bridge abutments were built and in place for over a 100miles and were rated for 80+ ton, our department of Lands and Forest didn't think 80+ ton abutments would hold a snowmobile or ATV an insisted that a engineer would have to design a co-abutment to hold the weight of snowmobiles and ATV's, lol, somebodies buddy was get their pockets filled. this crap happens here a lot.