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City of Tukwila <br />Public Works Department - Bob Giberson, Director <br />INFORMATIONAL MEMORANDUM <br />TO: Transportation and Infrastructure Committee <br />FROM: Robin Tischmak, Acting Public Works Director <br />By: Mike Cusick, Senior Program Manager <br />CC: Mayor Ekberg <br />DATE: October 6, 2017 <br />SUBJECT: CBD Sanitary Sewer Rehabilitation <br />City Project No. 91140203, Contract No. 16-054 <br />Supplemental Agreement No. 3 <br />ISSUE <br />Approve Supplemental Agreement No. 3 with RH2 Engineering, Inc. (RH2). <br />Allan Ekberg, Mayor <br />BACKGROUND <br />RH2 is the consultant for the 2016 CBD Sanitary Sewer Rehabilitation Project with Contract No.16-054. <br />The consultant is designing the CBD Sanitary Sewer Rehabilitation Program for repair and relining of <br />the remaining sanitary sewer pipe in the CBD (Commercial Business District). <br />DISCUSSION <br />This Supplemental Agreement will revise the construction documents to include the use of ultraviolet <br />(UV) cured in place pipe lining (CIPP) as an option to steam cured felt liner. The use of UV CIPP liner <br />will increase the number of contractors that do CIPP pipe relining and this may result in better bid <br />pricing. The time for the consultant to complete the project will be extended to January 31, 2018. <br />The original contract and Supplemental Agreement No. 1 (time only) and No. 2 were under $40,000, <br />but with Supplemental Agreement No. 3, the total contract will now be $41,382.28 and requires Council <br />approval. <br />FINANCIAL IMPACT <br />The 2017 design budget for the CBD Sanitary Sewer Rehabilitation Project is $45,000.00 <br />Agreement Budget for 2017 <br />2016 CBD Sanitary Sewer Rehabilitation $ 31,386.35 $45,000.00 <br />2017 Supplemental Agreement No. 2 5,006.50 <br />2017 Supplemental Agreement No. 3 4,989.43 <br />TOTAL $ 41.382.28 $ 45,000.00 <br />RECOMMENDATION <br />Council is being asked to approve Supplemental Agreement No. 3 to Contract No. 16-054 with RH2 <br />Engineering, Inc. for the CBD Sanitary Sewer Rehabilitation Project in the amount of $4,989.43 and <br />consider this item on the Consent Agenda at the October 16, 2017 Regular Meeting. <br />Attachment: 2017 C I P Pg. 81 <br />Supplemental Agreement No. 3 <br />W:1PW Eng1PROJECTSIA- SW Projects1CBD Sewer Rehabilitation (91140203)11nro Memo CBD RH2 Sup 3 100617.docx <br />