Officials with the Army Corps of Engineers plan to release their updated plan for management of the Missouri River by the end of the month. A group of scientists – the Coalition to Protect the Missouri River – wants to keep the Corps from putting a spring rise of river levels into the master plan. The group is made up of people with agricultural, business, and navigational interests in the river. The U.S. Fish and Wildlife Service is using a biological opinion that supports the spring rise because the opinion says the rise will help endangered species.