It has been in the news today that the Russians bombed a key bridge into Bakhmut today, a bridge that was vital for sending in supply truck to Bakhmut to supply the Ukrainians fighting in that city. The media has heavily shown videos of the blown up bridge! I am not an engineer but I think the Ukrainians could readily make a workable bridge in that location. The water flow is like a creek level not a river level water flow. What one could do is get prefabricated concrete sewer pipe they are like three to four feet in diameter in America they come like eight feet long you put two at the max three rows of these concrete pipes like forty feet long then you dump modest size rocks and chunks of concrete over the concrete pipe to within like a foot of the road level which will disperse the load of the trucks as they pass over the bridge and you then top off the bridge with a foot and a half of crushed stone and gravel. Besides the delivery trucks dropping off the concrete pipes and rocks and other supplies at the site, six workmen could make a workable bridge on that site in ten hours!