This project contains data and code used to analyze the behavior of the collision risk model used by the U.S. Fish & Wildlife Service to predict the number of Bald and Golden eagles that will be killed at proposed wind energy facilities. These predicted fatalities determine the amount of off-site mitigation required to obtain a permit exempting the developer from legal enforcement for killing these protected species. The analyses quantify the interactions between pre-construction eagle surveys, inherent eagle activity, wind facility size, predicted fatalities, and costs.