This project estimates the naturally available and technically recoverable U.S. wave energy resources, using a 51-month Wavewatch III hindcast database developed especially for this study by the National Oceanic and Atmospheric Administration's (NOAA's) National Center for Environmental Protection. For total resource estimation, wave power density in terms of kilowatts per meter is aggregated across a unit diameter circle. This approach is fully consistent with accepted global practive and includes the resource made available by the lateral transfer of wave energy along wave crests, which enables wave diffraction to substantially resestablish wave power densities within a few kilometers of a linear array, even for fixed terminator devices.