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TASK 11.0 OJECT DESC <br />IPTION, DELUVLRA <br />LES AND ASSUMPTJ <br />�F <br />NS <br />1.1 Project Description <br />The City of Tukwila (CLIENT) is requesting professional services from David Evans and Associates, Inc. <br />(CONSULTANT) to inventory and update the Sanitary Sewer and Surface Water Geographic Information <br />System (GIS). <br />The major features of the project include: <br />Sanitary Sewer <br />• Sewer Manholes <br />• Sewer Pipes <br />• Sewer Pump Stations <br />Surface Water <br />• Catch Basin <br />• Pipes and Ditches <br />• Stormwater Pump Stations <br />• Stormwater Detention Ponds <br />• Drain Points <br />1,2 Project Deliverables Furnished by CONSULTANT <br />CONSULTANT shall deliver the following documents and products to CLIENT as part of this agreement: <br />• Electronic copy of the updated GIS Geodatabase. <br />• Structure and Site Photos. <br />• Structure Data Sheets. <br />CLIENT will have the opportunity to review each of the deliverables. CLIENT review documents will be <br />returned with subsequent revision, illustrating that each review comment has been addressed as stated, <br />or how/why it was not addressed. <br />1.3 Responsibilities and Services Provided by CLIENT <br />CLIENT will: <br />• Provide electronic copy of the existing GIS Geodatabase that is to be updated. <br />• Provide existing as -built plans, horizontal and vertical monument information, GIS maps and <br />data, and other available mapping information. <br />• Review all submittals made to the CLIENT within 15 working days, or as agreed, and return them <br />to CONSULTANT with consolidated written comments regarding changes or revisions needed. <br />1.4 Project Assumptions <br />• Mapping accuracy requirement for object locations is "mapping grade" (+/- 3 feet). Objects will <br />be mapped to "survey grade" accuracy (+/- 0.10 feet) throughout the project unless dense <br />vegetation or forested areas prevent the use of survey grade GPS equipment. <br />• Horizontal datum will be NAD 83/91. <br />• Vertical datum will be NAVD 88. <br />• The project duration is assumed to be six (6) months. <br />City of Tukwila <br />Sanitary Sewer and Surface Water GIS Inventory and Update <br />Scope of Services <br />March 12, 2018 <br />46 <br />