INVENTORY, ASSESSMENT AND PRIORITIZATION OF MS4 OUTFALLS FOR REPAIR

This paper will describe the use of innovative data collection technologies to successfully reduce the time required for completion of data collection and how these technologies minimized errors and greatly improved the analysis and reporting of the results. In addition, the paper will illustrate how the collaborative approach of “in-house” and consultant expertise resulted in the development of assessment methodologies that simplified prioritization of District of Columbia Municipal Separate Storm Sewer System (MS4) outfalls for repair. Using these technologies and approaches, nearly 700 structures were inspected in three months, and resulted in a defensible CIP for repairing the most critical of the outfall structures. The approach described in this paper is easily customized for use in the inspections of any critical stormwater or wastewater infrastructure.