Water Line Extension Feasibility Study
Brief
A municipal client commissioned a feasibility study for the extension of water supply lines throughout the township. The township was rural and had significant topographical challenges such that the existing water system pressure was not sufficient to serve all areas. Therefore a multi-stage upgrade plan was created based on existing and proposed pressure zones.
process
LiDAR-based elevation data of 2-ft vertical resolution was the first element of the analysis, given the importance of topography in determining which households could be served. Two elevation limits were established (yellow and green contour isolines, above) and road segments were split at these elevations. The resulting road segments were summarized by length and number of houses to be served, and a large format print was produced for the client to accompany an engineering report.
Water distribution system Map Book
brief
A multi-township water authority commissioned the creation of hard-copy map books that could be kept in their service vehicles. A hard-copy product was desired so that it would not be affected by electrical or cell service outages as well as for cost considerations. Sample page (with identifying features removed) shown above; full product included a system-wide index map as well as a legend.
process
Aerial orthoimagery in State Plane coordinates was obtained from a state repository of spatial data, along with road names and route identifiers. Surface features such as hydrants, valves, and meters were field-surveyed to very high accuracy. Water line locations and attributes were obtained from georeferenced as-built CAD drawings and rectified with the more-accurate surveyed features.