The State of Oregon has employed the use of porous asphalt concrete surfaces (E and F-mixes) since the 1970s. The use of porous mixes has increased substantially in the past five years. Previously, no work had been done to evaluate whether the quality control/quality assurance (QC/QA) procedures used for dense-graded mixes were appropriate for open-graded mixes. This study consisted of a literature review, expert survey, and field survey of selected projects to determine the relative importance of the constituents (e.g., asphalt content, gradation, voids, moisture content) on the long-term performance of the pavement. The overall objective achieved by this study was the development of a basis for an improved QC/QA specification for porous pavements in Oregon. Specific objectives achieved include: 1) evaluation of experiences of others to control quality of open-graded mixes, 2) conducted a field survey of selected projects in Oregon to determine what factors most affect pavement performance, 3) recommended modifications to existing specifications which would include pay adjustments, and 4) developed a plan for implementing the resulting recommendations. This study found that the factors to be controlled during the production of porous pavements include asphalt content, gradation, and moisture content.