TIC 2018-03-26 Item 2B - Contract Amendment #2 - GIS Services for Water, Sanitary Sewer and Surface Water

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TASK 4.0 STa! i' Ail WATER GLS INVENT°?' Y 4.1 Field Review CONSULTANT will conduct an existing as-built/GIS review at the outset of the project to identify key field conditions that may impact the field mapping including safety, traffic and access issues. The procedures required to complete the field survey will be determined and safety risks will be analyzed. Structures requiring subconsultant assistance for traffic control to survey will be identified and will be scheduled to be completed with other structures requiring traffic control. Coordinate with traffic control subconsultant. Prepare traffic control plans when needed. 42 Data Collection CONSULTANT will field survey the location and collect attributes for up to 350 Storm Drain Features and their accompanying pipes. Structure sizes and depths, pipe sizes and invert elevations, etc. will be measured in the field so that necessary database attribute information can be completed. Field measurement data will be collected electronically in the field, which will update the GIS database electronically from the field. Additionally, hard copy structure cards will be completed in the field with the same measurements so that a quality control check of the information collected electronically in the field can be performed. CONSULTANT estimates that the miscellaneous GIS updates that thus far have been requested by CLIENT can be completed within the allocated budget. In addition, as budget allows CLIENT will provide CONSULTANT additional CIP project plan sets to be need to be incorporated in to the GIS database. The CONSULTANT will use CLIENT provided GIS database structure. 4.3 Storm Water As -Built Research CONSULTANT will review research on existing utility information, provided by CLIENT, for inclusion in the mapping. Where possible CONSULTANT will use provided as -built records to prepare and pre -enter attribute information to be field verified. This will make the field effort more efficient. 4.4 Geodatabase Preparation CONSULTANT will utilize its field surveyed information, and the as -built research to update the CLIENT's existing Geodatabase GIS files. The CONSULTANT will include metadata for the Geodatabase updates. Deliverables: Electronic copy of the updated Geodatabase City of Tukwila Sanitary Sewer and Surface Water GIS Inventory and Update Scope of Services March 12, 2018 49