I have very similar crossing, slightly larger in Dale County, Bear Creek, and after much debate hauled in # 4 crushed stone, 40 tons of the stuff. I should have placed a bottom fabric down first that is made for this application. Crossing works well for all my heavy rolling equipment. Be sure the crunched stone extends beyond normal water line 20 or 30 feet either side of the creek. Based upon photo the entire place floods several time a year. This massive amount of water needs to be able to move quickly "without disruption". After floods there will be a buildup of sand on the entrance road that a box blade will quickly handle. My creek project is 8 years old and has stood the test of many floods with minor work with box blade. ps do not dam the creek with stone the stone should be at the surface of existing dirt and creek bottom elevation. I used a D6 Cat to press the stone in place. Dry season project!