As part of Boston Water and Sewer Commission's (BWSC's) Citywide Catch Basin Inspection, Cleaning and Preventative Maintenance Program, Camp Dresser & McKee (CDM) has developed an application and data management program to support field-collection and data integration with BWSC's existing Geographical Information System (GIS) and Computerized Maintenance Management System (CMMS), CASSWORKS by The RJN Group. The project required mobilizing crews to capture spatial and attribute information on approximately 33,300 catch basins, and ultimately integrating this data through a front-end GIS maintenance/editor and into a tiled GIS. In order to maximize efficiency and data quality, CDM developed a mobile computing solution that resulted in a total efficiency savings of approximately 58%, approximately 9% savings for catch basins inspections, 100% savings for data collection, and 100% savings for the catch basin mapping. This paper discusses the customized ArcView application that was developed to assist the field crews as well as the integration strategy used to transfer data to BWSC's GIS and Oracle systems. Includes tables, figures.