Mid-West GIS will begin Phase III of the Storm Sewer GPS mapping project for the City of Portage, Indiana next week. This project includes Survey Grade GPS data collection as well as a detailed inventory of the attributes of the system. Invert elevations are also collected to determine flow direction used for flow analysis by the City. It is estimated approximately 6,000 points will be collected by the end of the project, with 4,200 already completed.