At 16 feet of lift, pretty much any 1/2HP or greater pump should do the job for you. However, due to the iron oxide contaminated water, the pumps may not last as long as they would under normal water conditions.
Zoeller, StormPro and Pro Series pumps are some of our top brands and based on the water table in your area, I would say to stick with a 1/2HP if you're in a low-medium water table area and a 3/4HP only if your in a high water table area that experiences a lot of potential flooding.