TIC 2018-05-14 Item 2D - Agreement - Memorandum of Agreement with Seattle City Light / City of Seattle for Underground Electrical Distribution System Cost Sharing (53rd Avenue South Project)

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oto igh City of Tukwila Public Works Department - Henry Hash, Director INFORMATIONAL MEMORANDUM TO: Transportation and Infrastructure Committee FROM: Henry Hash, Public Works Director i4 BY: Ryan Larson, Senior Program Manager CC: Mayor Allan Ekberg DATE: May 11, 2018 SUBJECT: 53rd Ave South - S 137th St to S 144th St Project No. 99410301 Memorandum of Agreement with Seattle City Light/City of Seattle Allan Ekberg, Mayor ISSUE Enter into an agreement with Seattle City Light/City of Seattle (SCL) for the construction cost sharing to underground the electrical distribution system as part of the 53rd Ave S Project. BACKGROUND The 53rd Ave S Project will construct roadway, drainage, sidewalks, illumination, water and sewer upgrades, and undergrounding of overhead utilities between South 137th Street and South 144th Street. The project design team worked with utility providers including Seattle City Light to incorporate their system requirements and design into the City's project. Negotiations between staff and SCL resulted in the attached Memorandum of Agreement (MOA) to cost share the undergrounding portion of the 53rd Ave S Project. ANALYSIS The costs to underground the electrical distribution system is proposed to be split; SCL will be responsible for 60% of the cost and Tukwila responsible for 40%. Costs for the aerial conversion are divided into two distinct types of work: civil Infrastructure costs and Underground Electrical System (UES) costs. Civil costs cover the work to install the physical infrastructure (e.g. vaults and conduit) while UES costs are for the work and materials to pull the cabling through the infrastructure and connect and energize the new system. Agency Civil Cost UES Costs Total SCL (60%) $ 412,823.40 $444,600.00 $857,423.40 Tukwila (40%) 275,215.60 296,400.00 571,615.60 Total $ 688,039.00 $741,000.00 $1.429.039.00 The costs above reflect the MOA language and the results from the actual contractor's bid. The final costs will be adjusted to reflect actual costs incurred during construction, but the share will be split with the 60%/40% cost share ratio. FINANCIAL IMPACT The total cost for underground is $1,429,039.00. Tukwila's share to underground the electrical system under this MOA is anticipated to be $571,615.60 based on the bid proposal and the UES costs projected by SCL. The anticipated reimbursement amount from SCL is $857,423.40. The cost sharing with SCL does not include all costs for the aerial conversion, only those specifically identified in the MOA as shared costs. Trenching and backfill costs within the right-of-way and all conversion work on private property are examples of work to be performed entirely at the City's expense and not part of this SCL MOA. RECOMMENDATION Council is being asked to authorize the Mayor to execute the Memorandum of Agreement with Seattle City Light for the 53rd Ave S Project and consider this item on the Consent Agenda at the May 21, 2018 Regular Meeting. Attachments: Memorandum of Agreement by and between the City of Seattle and City of Tukwila Page 3, 2017 CIP 19 W: PW EngIPROJECTSIA- RW 8 RS Projects153rd Ave S (90110301)1ConstructonlInfo Memo SCL MOA 051118 gl.docx