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HomeMy WebLinkAboutTIS 2023-04-03 Item 1F - Discussion - Underground Utilities for South 152nd Street Safe Routes to School ProjectCity of Tukwila Allan Ekberg, Mayor P tttic Works Deportrnerat - Hari Ponrreakonti J?frector/City Emirver INFORMATIONAL MEMORANDUM TO: Transportation and Infrastructure Services Committee FROM: Hari Ponnekanti, Public Works Director/City Engineer BY: Adam Cox, Transportation Project Manager CC: Mayor Ekberg DATE: March 31, 2023 SUBJECT: 5 152nd Street Safe Routes to School Project Project No. 91710303 ISSUE Discussion on undergrounding utilities for the 152nd St Safe Routes to School (SRTS) project. BACKGROUND The S 152nd Street SRTS project will design new curb, gutter, and sidewalks along the stretch of road between Tukwila International Boulevard and 42nd Avenue S. Additionally, improvements to the existing storm drainage system will be included to improve operation and water quality in the Gilliam Creek basin. ANALYSIS KPG-Psomas, Inc. (KPG) was selected to perform the design of the project in April 2022. The 30% plans and estimate (P&E) were submitted to the City in December 2022 and comments/review was submitted back to KPG to incorporate. The initial scope of work did not include undergrounding overhead utilities as the focus for the project was establishing pedestrian facilities, stormwater, and roadway improvements. During future discussions, undergrounding of overhead utility requirements/codes warrants further examination for this project. Undergrounding overhead utilities for this project would require additional funds of at least $3.2 million. In addition to the added design and construction costs, it is estimated that the construction start would be delayed a year due to the added scope of the undergrounding. The undergrounding could also double the calendar days to close out the project - not contract working days, but total time the contract is open due to pole removals, comm wire installation, and service conversion. FINANCIAL IMPACT The rough order of magnitude (ROM) provided by KPG for the additional design and construction to underground the overhead utilities is $3.2 million, borne by the general fund with minimal support from grants. Sound Transit is currently funding 100% the design of the pedestrian and roadway facilities. The City has also applied to the Washington State of Transportation (WSDOT) for SRTS funding. Unfortunately, we were not selected to receive funding, however, the project is first on the list to receive funding if additional funding becomes available or other awarded projects do not continue. RECOMMENDATION The Council is being asked to accept a deviation as described in TMC 11.28 for not requiring undergrounding overhead utilities on the project to allow the project to move forward toward the 60% design. Attachments: 2023 CIP, Page 4 S 152nd Utility Undergrounding Memorandum 89 CITY OF TUKWILA CAPITAL PROJECT SUMMARY 2023 to 2028 PROJECT: S 152nd St Safe Routes to School Project No. 91710303 DESCRIPTION: Install curb, gutter, and sidewalks on both sides of S 152nd St, including widening pavement width by three feet to construct an on -street parking lane as a buffer between the roadway and sidewalk on the north side. JUSTIFICATION: Enhance safety for students walking to Foster High School, Showalter Middle School, and Thorndyke Elementary School and encourage transportation choices for the neighborhood. STATUS: Design funded, construction pending SRTS grant funding. MAINT. IMPACT: New sidewalk and pavement will need to be maintained. COMMENT: Sound Transit System Access Fund Grant of $369k for design. Apply for SRTS grant in 2021 for construction. FINANCIAL Through Estimated (in $000's) 2021 2022 2023 2024 2025 2026 2027 2028 BEYOND TOTAL EXPENSES . Project Location _: rartrarr- >Ili • Iv Design 453 TE011 � � , � 4V ' LI 453 Land (R/W) .141) 15 _ - 15 Const. Mgmt. 400 �. fA*N 400 Construction 3,600 d1 3,600 TOTAL EXPENSES 0 453 4,015 0 0 0 0 0 0 4,468 FUND SOURCES �St IIIII wil �1Gls , �����911° S 160 S[ O Tukwila Pkwy t { Awarded Grant 369 369 Proposed Grant 3,200 - 3,200 Solid Waste Utility Tax 100 100 Surface Water Fund 84 84 103 Fund Balance 0 715 0 0 0 0 0 0 715 TOTAL SOURCES 0 453 4,015 0 0 0 0 0 0 4,468 2023 - 2028 Capital Improvement Program 4 90 . Project Location _: rartrarr- >Ili • Iv TE011 � � , � 4V ' LI II iinilin iI44. .141) _ - N �. fA*N laYM L tn d1 Ilk�1'50 �, 47 SI MI ''' .L' is S[ - rfm ri g ilk 15 �\ `�th0enre 01) sd /�� 1 �St IIIII wil �1Gls , �����911° S 160 S[ O Tukwila Pkwy t { 2023 - 2028 Capital Improvement Program 4 90 Memorandum To: Public Works Department, City of Tukwila Cyndy Knighton — Project Manager From: KPG Psomas Bryce Corrigan, PE Date: 5/17/2022 Re: S 152nd St Utility Undergrounding The City of Tukwila has selected KPG Psomas to perform design of non -motorized improvements along S 152nd St from Tukwila International Boulevard to 42nd Ave S, about 1,600 linear feet. The purpose of this memorandum is to provide a budget estimate for power and communication utility undergrounding with the project corridor. Figure 1 shows the project location highlighted in blue: gteirta ©Mgr Redevelopment • ▪ 4 :Sth St h. • • • . S'IEth St (n • N d • • 21 C (n . r S15ahSt • • • Nd • Sd"ncce • • • m • S 1S6th St o CC C � U � C Souihcent et S150...1,1$1/ Scullarer Blvd �— International Boulevard Light Rail Station 99) Future • Transit Oriented Development II (TOD) ,,,slit S 5 • • • ) • • Figure 1: Project Location Background Pursuant to City Code 11.28.010 the City's desire is to underground all overhead electrical power and communication wires. They City has consistently enforced this practice upon themselves as part Public Work's CIP projects where (per 13.08.085) the City desires to install any new utilities, street improvements (sidewalk, widening, etc) or change the grade of any roadway or alley. The boundary streets, Tukwila International Boulevard and 42nd Ave S both currently have the power and communication utilities underground. 3131 Elliott Avenue, Suite 400, Seattle, WA 98121 206.286.1640 www.kpg.com 91 Current S 152nd St Project At this time there is not utility undergrounding being proposed for the S 152nd St Corridor as part of the non -motorized connection project. The extent of utility work on this project is a new drainage system, utility pole relocations, and surface adjustment of structures for the various providers within the project limits. The City requested of KPG Psomas to prepare a budget amount that undergrounding S 152nd St would cost. Below is that discussion. First KPG PSomas evaluated the mean cost of the 53rd Project (2,100 linear feet) completed in 2019 which undergrounded Seattle City Light's power infrastructure and Comcast and Lumen (Century Link) communication infrastructure. That Project's undergrounding effort was completed for roughly $1,325 per linear foot, or $440/1inear foot/provider. Second, we added 130% cost increase to that total to account for inflation and various worldly events that have taken place since then. We then compared this escalated cost to current 2022 estimates and bid tabulations from project of similar size and scope. The escalation and comparison yielded a 2023 projected cost of roughly $1,725/1inear foot, or $575/1inear foot/provider (assuming three providers). We then applied that to the S 152nd St Project and an approximate construction cost to underground the utilities is $2,800,000. Engineering for this effort is approximately $415,000. The total effort for utility undergrounding of S 152nd St would be roughly $3,215,000. Please see the summary table below: Engineering + Final Design (15%) $ 414,000.00 RECOMMENDED BUDGET AMOUNT 53RD AVE S SCHEDULE C $ 3,215,000.00 2018 $ 2,010.00 Linear Feet 2100 No. Services 36 Total (avg of bidders) $ 2,781,966.00 $/Service $ 77,276.83 $/LF $ 1,325.00 2023 Inflation + Other Cost Impacts 130% Total in 2023 $ 3,616,555.80 Total $/Service in 2023 $ 100,459.88 Total $/LF in 2023 $ 1,722.17 use $ 1,725.00 S 152nd St Linear Feet 1600 No. Services 28 Budget Estimate $ 2,760,000.00 $/LF $ 1,725.00 $/Service $ 98,571.43 Engineering + Final Design (15%) $ 414,000.00 RECOMMENDED BUDGET AMOUNT Total, Eng+Const (Rounded) $ 3,215,000.00 $/LF $ 2,010.00 Est Total No Undergrounding $ 4,500,000.00 Est Total with Undergrounding $ 7,700,000.00 2 of 3 92