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尽管生境保护工作减少,但系统的改善使美国国家海洋和大气管理署、邦纳维尔电力管理局、垦务局和陆军工程师团在10 a内仍需花费60多亿美元制定保护哥伦比亚河鲑鱼和硬头鳟的管理计划。
Despite the reduction in habitat protection efforts, improvements in the system have cost the U.S. National Oceanic and Atmospheric Administration, Bonneville Electricity Authority, Reclamation Bureau and Army Corps of Engineers more than $ 6 billion over 10 years to develop conservation programs for the Columbia River salmon and Hard trout management plan.