This document summarizes research into modeling the surface roughness of graphite/epoxy composites cut using abrasive waterjet cutting. Experiments were conducted varying water pressure from 60-90 ksi, abrasive flow rate from 1-2 lb/min, and traverse speed from 20-60 in/min. Mathematical models for surface roughness at different cutting depths were developed using the experimental data. The models were verified to fit well for cuts up to a depth of 1/4 inches. Analysis found that higher water pressures resulted in greater abrasive disintegration, affecting surface quality. Comparisons were made between cutting 1 inch thick composites versus stacking four 1/4 inch layers, finding vibration impacted surface roughness.