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'-"Jork Tasks: TASK 6,1. IDENTIFY ELEMENTS TO BE INCLUDED IN THE CITY'S MODEL WY A will work closely with the City's staff to develop working maps of proposed modeled pipelines and nodes. The model will include all distribution system pipelines, to preserve a one-to-one correspondence with the GIS, and to facilitate future model updates. WY A will work with City staff to identify those pipelines and specific areas of the City's water system which require special attention. WY A will also work closely with City staff to develop a nodal and pipeline naming convention which will meet both existing and future needs, and to build a model that exchanges new information easily with the City's GIS. TASK 6.2, IMPORT WATER SYSTEM SHAPEFILE INTO HYDRAULIC MODEL After the nodal and pipeline naming conventions are established, WY A will work with City staff to generate a shapefile of City's water distribution system facilities (pump stations, tanks, wells and control valves) and pipeline infrastructure. WY A and City staff will also confirm and update any pipelines and/or facilities that have not have been included in the GIS database. WY A will populate the elevation database using U.S.G.S. digital elevation maps (DEM), which will allow WYA to directly extract attribute data from the elevation contour shapefiles of the City and allocate them to their corresponding junction in the model. If required, the model elevations will be converted to North American Vertical Datum, 1988. As part of this task, WY A will also confirm whether the translation of the network from the GIS geodatabase into the recommended software is complete and accurate. WY A will utilize software tools to check that the network is correctly constructed, and to identify and automatically correct any network topology problems (e.g., disconnected nodes) and data flaws (e.g., duplicated pipes or nodes) that may have arisen from the original model development. These software tools will be used to identify: overlapping or duplicate nodes, pipe-split candidates, crossing or intersecting pipes, orphan pipes, duplicate pipes, disconnected nodes. WY A will utilize these tools to confirm that the model topology is consistent with the City's existing system map files. TASK 6.3, DEVELOP AND ALLOCATE EXISTING DEMANDS INTO HYDRAULIC MODEL The City currently has existing meter/consumption data coupled to service address and a revenue class designation. Although consumption data also includes unique meter identifiers, these meter identifiers are not consistent with meter identifiers used in GIS. Therefore, service address will be used to geocode meter/consumption data to a GIS-based street map of the City's water service area. WY A will use this data, in conjunction with a special GIS street file map, to produce a meter/consumption GIS file containing the City's existing water demands and revenue class designation. WY A will review data that cannot be geo-coded to determine and correct obvious errors (misspelled street names, etc.). For other missing data, WY A will use a variety of techniques to determine whether the demands can be assigned. WY A will also request City assistance in resolving data discrepancies between billing data and GIS street files. WY A will provide billing database corrections to the City for its future use. Once the meter/consumption GIS file of the City's existing water demands is developed, WY A will then use the modeling software's allocation module to automatically allocate meter/consumption data to individual junctions in the hydraulic model. The allocation module determines the demand at each junction by identifying and summing all the meter/consumption data located within an associated service area. The meter/consumption data will be allocated to October 22, 2009 7