Gravel chub silt and debris. They are more often found in areas with limited macrophytes and larger root aquatic plants, algae and moss. Because of their need of a specialized clean habitats, the gravel chub is especially vulnerable to various forms of pollution, especially from agriculture practices that create erosion and excessive silt. In past sampling surveys the gravel chub had been found as far north in the Upper Iowa River as Le Roy, Minnesota, but because of excessive amounts of sewage, pesticides and sedimentation of rocks and sand, this is no longer the case. The presence of gravel chubs in a
Mike Gravel Washington, D.C. Short on campaign cash, he took public transportation to get to his announcement. (Gravel called for public financing of elections.) Other principal Gravel positions were the FairTax, withdrawal of U.S. troops from Iraq within 120 days, a single payer national health care system, and term limits. In particular, he had opposed the Iraq War from the beginning, and in 2006 Gravel said that U.S. troops in Iraq, as in Vietnam, had "died in vain". He also favored a regional peace initiative, as well as reparation payments for Iraqis. Gravel also called for a "U.S. corporate withdrawal from Iraq",