Western Water and American Food Security Act of 2015

[AI summary unavailable — showing source text] Western Water and American Food Security Act of 2015 Defines: (1) "Delta" as the Sacramento-San Joaquin Delta and the Suisun Marsh; and (2) "negative impact on the long-term survival" as an appreciable reduction in the likelihood of the survival of a listed species in the wild by reducing the reproduction, numbers, or distribution of that species. TITLE I--ADJUSTING DELTA SMELT MANAGEMENT BASED ON INCREASED REAL-TIME MONITORING AND UPDATED SCIENCE Requires the U.S. Fish and Wildlife Service (USFWS), by October 1, 2016, and at least every five years thereafter, to cooperate with federal, California, and local agencies to use updated scientific and commercial data to modify the calculation of incidental take levels for adult and larval/juvenile Delta smelt in the biological opinion for the Central Valley Project (CVP) and the State Water Project (SWP) issued by the USFWS on December 15, 2008. Directs the USFWS to implement and make appropriate amendments to the reasonable and prudent alternative described in that smelt biological opinion. Requires the Department of the Interior to make all significant decisions in writing under the smelt opinion and any successor …