Across the Rio Grande

I enjoyed making the cactus bases for Fistful of Lead: Reloaded games the other week, so thought I'd carry on with my desert terrain scratch building efforts. In the rules there are a number of campaign scenarios, one of which features a river crossing by a renegade gang, who are attempting to escape the posse that are hot on their heels. I like the sound of this but don't have any river sections, apart from some winter ones that are not exactly suitable for the Mexican border. What I do have are some lasercut 2mm mdf river templates from East Riding Miniatures, which I will be using to create a 3' plus length of river 4'' wide, including a handy removable ford section. I may also ask Tony at ERM to cut me some bends to match the straight sections that I already have, so that it doesn't look too regular.