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FORM A <br />Contract No_ 1 0 -022 -1 6 (- <br />Supp1emer it No_ 2 O <br /> <br />City of: Tukwila Request Number: TK -016 Date: 08/23/2016 <br />Problem Description: The South 119th St Pedestrian Bridge is constructed of timber glue laminated <br />girders. These girders have localized rot and splits caused by exposure to the weather and moisture <br />infiltration due to failure of the paint system. In addition, the bare timber plank bridge deck is weathered <br />and has worn unevenly causing it to become slippery when wet and presents tripping hazards. <br />Nature of Request: Remove and repair rot on the tops of the girders and laminate new wood where <br />necessary. Clean and fill the open cracks with epoxy. Tukwila has a conceptual set of plans prepared by <br />an Engineering Consultant and has met with King County Bridge Maintenance on site to discuss the <br />repair. A plan was developed to remove and repair the girder top rot by a combination of the <br />following methods: full width removal and timber replacement; and cleaning out localized rot <br />pockets and filling with epoxy catalyzed putty. In addition, the deck will be cleaned, leveled, and <br />covered with an epoxy to seal the timber and to provide a substrate to adhere non -slip aggregate. <br />Location: North Tukwila in the Allentown area at S 119th St over the Duwamish River. <br />Attachments: Scope of Work Engineering Design <br />City Priority: Medium <br />Special scheduling requirements: There are no current special scheduling requirements related to public <br />use of the facility. However, it is necessary to complete the work and utilize favorable weather conditions <br />for correction of the deficiencies on the structure. <br />City Project Manager- Telephone Number: Steve Carstens, P.E., 206 - 431 -2446 <br />Authorized By: Robin Tischmak Date: 08/23/2016 <br />FORM B <br />ARMS Project #: EBS Project #: Work Order #: Form B Sent to City Date: 08/23/2016 <br />Recommended Action: Remove rotten materials and replace, and fill with epoxy and wood filler. Deep <br />rot is unknown; process may change depending upon conditions. Cost estimate details: labor - $24,260, <br />equipment - $5,240, materials - $9,820. <br />Proposed Schedule: 9/6/16 - 9/16/16 <br />County Project Manager: Ross Pettit <br />Cost Estimate: $39,320.00 <br />Authorized By (City - $500): <br />Date: <br />CITY OF TUKWILA <br />Mayor, Allan Ekberg <br />,/ 57L0or z eie /614/Ay-,S <br />