E2 has developed software applications that enable clients to view in a variety of formats the impacts of decisions in the presence of a multitude of inputs, alternatives, and uncertainties defining a wide range of cost, benefit, and risk endpoints. 

Cost-Benefit-Risk Analysis. E2 has developed a decision support software for the St. Paul District of the Army Corps of Engineers to assess engineering alternatives developed to minimize/eliminate the adverse effects of severe out-draft conditions at Lock and Dam 3 on the Upper Mississippi River. The adverse effects included risks of injury, disablement, and fatality of workers and risks of pool drawdown and shutdown of Prairie Island Nuclear plant. The decision support system was developed as a software tool with easy-to-use graphic-user-interface and uncertainty propagation. It was successfully used as the decision support tool by the Corps managers and engineers.

Data Visualization and Decision Support System. E2 has developed a data visualization and decision support tool for the implementation of an Adaptive Environmental Management Plan for the Columbia River Channel Improvement Project for Portland District of Army Corps of Engineers. The tool has been designed to track physical parameters (temperature, salinity, and water depth) at various locations within the Columbia River Estuary during channel deepening and compare them with parameter-specific decision criteria to ensure that the existing fish and crab habitats in the Columbia River Estuary are unaffected.

Resource Hydrograph Generation. In order to protect a number of ecological resources (e.g.,  walleye, muskellunge, surface feeding ducks, sedge meadow) in several reservoirs of the Upper Mississippi River System, E2 developed a habitat suitability-based stage and flow hydrograph generation model. The model can be used to determine a range of biweekly stage heights and river flows for each reservoir and resource which would ensure adequate protection of the resource in the reservoir. The model was developed for the Reservoir Operations Plan Evaluation (ROPE) Study.