TIC 2017-09-26 Item 2B - Contract Supplement #3 - Tukwila Urban Center Pedestrian-Bicycle Bridge with AKANA

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City of Tukwila Public Works Department - Bob Giberson, Director INFORMATIONAL MEMORANDUM TO: Transportation and Infrastructure Committe FROM: Bob Giberson, Public Works Director. BY: Peter Lau, Senior Program Manager CC: Mayor Ekberg DATE: September 22, 2017 SUBJECT: Tukwila Urban Center Pedestrian/Bicycle Bridge Project Project Number 90510403, Contract No. 16-092 Supplemental Agreement No. 3 with AKANA Allan Ekberg, Mayor ISSUE Authorize the Mayor to execute Supplemental Agreement No. 3 to Consultant Contract No, 16-092 with AKANA in the amount of $214,689.00. BACKGROUND AKANA's Contract No. 16-092, with Supplemental Agreements 1 and 2, provide construction management (CM) services for the Tukwila Urban Center (TUC) Pedestrian/Bicycle Bridge Project, including Lidar scanning of the fabricated steel arch bridge, recommendation of bridge structural acceptance, and material inspection and testing services at less cost than WSDOT's Material Laboratory. DISCUSSION The TUC Pedestrian/Bicycle Bridge Project has been delayed from physical completion mainly due to the steel bridge fabrication dispute between the construction contractor and its material fabricator. The construction contract expired on August 8, 2017, while the current estimated physical completion date is now November 22, 2017. The remaining funds from the consultant contract with AKANA is also running out due to the delay. In order to have continuous CM support from AKANA through the end of the construction project, Supplemental Agreement No. 3 is needed for their continuous construction engineering, inspection and material testing services. At the same time, the City has put the construction contractor on notice of $198,490,12 fora liquidated damage (LD) assessment. FISCAL IMPACT The 15% construction contingency was $942,835.59 and will cover AKANA's Supplemental Agreement No. 3. There have been $53,756.99 in Change Orders to date and AKANA's Supplement No. 2 for $36,480.00 is being drawn from contingency. Supplemental Agreement No. 3 for $214,689.00 was carefully reviewed and is reasonable for the scope of work. CM & CO Expenses AKANA Supplement No. 3 $ 214,689.00 AKANA Supplement No. 2 36,480.00 Change Orders No.1 to No. 5 53,756.99 Total: $304 925 99 15% Contingency $942,835.59 $942,835.59 RECOMMENDATION Council is being asked to approve Supplemental Agreement No. 3 with AKANA in the amount of $214,689.00 for the TUC Pedestrian/Bicycle Bridge Project, and consider this item on the Consent Agenda at the October 2, 2017 Regular Meeting. Attachments: AKANA's Supplemental Agreement No. 3 W:1PW Eng1PROJECTSW- RW & RS ProjectstTUC Ped Bicycle Bridge (90510403)1ConstmctionVt,100 - Contract Documents\CM ConsultantWKANA1Sup #3t1nto Memo For AKANA Sup #3, 9-19-17 Sm.Do0o 29