At the request of the U.S. Army Engineer Division, Pacific Ocean (POD), a numerical model wave response study of proposed improvements to Maalaea smali boat harbor was conducted by the U.S. Army Engineer Waterways Experiment Station's (USAEWES) Coastal and Hydraulics Laboratory (CHL). The study was conducted as a revision and extension of previous studies (Lillycrop et al. 1993, Thompson and Hadley 1 994b) to assess the wave response of various alternative modification plans for the harbor. This report - is focused on the determination of an optimal design plan which would provide the harbor with adequate protection from the incident wave climate. Information provided in earlier reports is referenced in this report, but generally not repeated.