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Home My WebLink AboutTIS 2025-07-28 Item 1J - Report - 2025 Annual Bridge ReportINFORMATIONAL MEMORANDUM TO: Transportation and Infrastructure Services Committee FROM: Jen Tetatzin, Public Works Director BY: Adam Cox, Interim Traffic Engineer CC: Mayor Thomas McLeod DATE: July 25, 2025 SUBJECT: Annual Bridge Inspections and Repairs Update Project No. 70010402 2024 Presentation on the State of the City’s Bridges ISSUE Provide the Transportation and Infrastructure Services Committee with information about the status of the City’s bridge inspection program and inventory, showing the overall condition of the City’s bridges after completion of the 2024 inspections. BACKGROUND The Federal Highway Administration (FHWA) and Washington State Department of Transportation (WSDOT) require regularly scheduled inspections of all the City’s vehicle-carrying bridge structures. The City extends this effort to include its pedestrian bridges. This requirement allows for continuity in reporting nationally, a standardized method of risk assessment, as well as the opportunity to identify and potentially fund bridges in need of replacement and rehabilitation. ANALYSIS The City currently owns 24 bridges (16 traffic bearing and 8 pedestrians). Of those, two are jointly owned jurisdictional bridges with shared ownership between the City of Renton (Grady Way) and the City of Kent (S 196th/200). The discussion will focus on why the City inspects its bridges, where the City stands with respect to the state and the country, and recommendations for additional steps that can be taken to address known issues. There were no new key findings or major concerns observed during the 2024 inspections. The following structures were inspected in 2024: Bridge Number Bridge Name Date Inspected Tukwila 05 Southcenter Blvd over the Green River 8/15/2024 Tukwila 14 42nd Ave S Bridge 4/30/2024 Tukwila 15 Pacific Highway over the Duwamish River 8/22/2024 Tukwila 17 Foster Golf Trail 4/30/2024 Tukwila 18 Green River Trail 8/15/2024 Tukwila 20 Interurban Trail 9/19/2024 Tukwila 21 Starfire over the Green River 8/22/2024 Tukwila 22 Fort Dent Trail 9/19/2024 Tukwila 25 Green River Ped Trail 9/19/2024 141 Annual Bridge Inspection Report July 25, 2025 Page 2 The Federal Highway Administration (FHWA) has utilized the sufficiency rating (SR) for the National Bridge Inventory (NBI) to inventory the over 600,000 bridges in the United States since 1995. In 2024, the FHWA removed the SR for the inventory and switched to the Specifications for the National Bridge Inventory (SNBI). The new inventory method can track multiple elements of bridges and provide a more accurate evaluation of a bridge’s overall assessment. This allows the FHWA to have a better understanding of the conditions of all bridges throughout the US. FISCAL IMPACT The cost encumbered for King County to perform the 2024 inspections was $23,000.00. RECOMMENDATION None. Information only. Attachment: 2024 Annual Bridge Inspection Report 2024 City of Tukwila Bridge Inspection Cover Letter Map of Tukwila’s Bridges Annual Bridge Repair & Maintenance CIP page 142 Forward The Bridge Inspection Report , dated July 2025, is published by the City of Tukwila Public Works Department, and the information contained herein is the best available at the time of publication. It is to be used as an information tool for planning and maintenance activities, and reflects the general condition of the City's bridges. The repairs indicated are summarized from the more details bridge inspection reports for brevity. Background The Federal Highway Administration(FHWA ) issued the National Bridge Inspection Standards (NBIS) in 1971. These standards established a comprehensive inspection for all bridges in the federal highway system. Minimum qualifications were set forth for bridge inspectors. Specific types and frequencies of inspections for bridges were established, and the reporting of certain standard information about each bridge was required. In 1978, these requirements were extended to all public bridges carrying vehicular traffic. A National Bridge Inspection Program has been in place ever since, and state and local agencies have performed bridge inspection in accordance with these guidelines. Inspections for the City of Tukwila's bridges are conducted every two years unless conditions warrant additional inspections or frequencies as dictated by the NBIS. iii 143 Bridge Number Name Year BuiltDeck OverallSuperstructure OverallSubstructure OverallWSDOT Bridge IDADTNext ADT ReqdLast Inspection Next Inspection DateUBIT RequiredLast UBIT InspectionNext UBIT Insp ReqdFracture CriticalSpecial NotesTukwila 01Macadam Road1997 6 6 7 08674200 3,600 2024 4/26/2023 2025N--N Tukwila 02Frank Zepp1968 667 08561400 36,000 2022 4/26/2023 2025Y2021 2025 N Tukwila 03Lois T Newton1973 677 08544400 18,900 2021 4/6/2023 2025Y2023 2029 NTukwila 05South-center Blvd1994 666 0014269D 10,616 2026 8/15/2024 2026Y2020 2026N Tukwila 06Foster 56th Ave1985 7 7 6 08166200 2,850 2024 4/6/2023 2025Y2023 2029 N Bridge Rail fixed on the north sideTukwila 0751st Ave South1996 6 5 6 08634500 4,600 2024 4/26/2023 2025N--N Tukwila 08Grady Way1986 7 6 7 08543600 26,000 2024 4/13/2023 2025Y2019 2025 N Jointly owned with City of Renton Tukwila 09E Marginal Way1989 6 7 7 08110200 13,000 2024 4/5/2023 2025Y2023 2029 N Tukwila 11BAR Airport Way1952 4 5 6 08001800 40,000 2024 4/11/2023 2025N--NTukwila 12BAR BNSF1945 5 5 6 08002500 40,000 2021 4/5/2023 2025Y2023 2027 NTukwila 13Beacon Ave S1971 7 6 6 7996800 500 2020* 4/25/2023 2025N2017 2019Y Tukwila 1442nd Ave S1949 554 08651500 10,300 2026 4/30/2024 2025Y2023 2025Y90% Plans and Estimate were reviewed in December 2024Tukwila 15Pacific Hwy 2000 676 08651500 22,406 2025 8/22/2024 2026Y2020 2026 NTukwila 16S 119th 1965 5 5 6 08104300 NA NA 4/17/2023 2025N--NTukwila 17Foster Golf Course1987 7 7 7 08584100 NA NA 4/30/2024 2029N--NBridge Quick Reference Data Summaryiv144 Bridge Number Name Year BuiltDeck OverallSuperstructure OverallSubstructure OverallWSDOT Bridge IDADTNext ADT ReqdLast Inspection Next Inspection DateUBIT RequiredLast UBIT InspectionNext UBIT Insp ReqdFracture CriticalSpecial NotesBridge Quick Reference Data SummaryTukwila 18Green River Ped & Utility1983 7 5 6 08584200 NA NA 8/15/2024 2026N--NTukwila 19Inter-urban Trail2006 8 8 8 08742500 NA NA 8/18/2022 2026N--NTukwila 20180th Street Trail2001 8 7 5 08742600 NA NA 9/19/2024 2026NYTukwila 21Fort Dent Road1975 6 6608328300 1,150 2025 8/22/2024 2026Y2024 2030 NTukwila 22Fort Dent Trail2002 6 7 7 8718400 NA NA 9/19/2024 2026N--NTukwila 24Klickitat2012 7 7 8 08853600 14,024 2023 4/13/2023 2025N--NTukwila25TUC PedBridge2018 8 8 8 8919000 - - 9/192024 2026N--NTukwila26Riverton Creek Ped2021 8 8 8 8931100 NA - 8/16/2022 2027N--N4001196-200th1998 5 6 7 08712100 17,406 2023 4/7/2023 2025Y2021 2027 N Jointly owned with City of KentNOTES:Deck Overall, Superstructure Overall, and Substructure Overall are based on a 1 - 9 scale that encompasses the condidtion and defecnces observed of the components during the regular scheduled inspection. The descriptions are:N - NOT APPLICABLE9 - EXCELLENT CONDITION8 - VERY GOOD CONDITION - no problems noted.7 - GOOD CONDITION - some minor problems.6 - SATISFACTORY CONDITION - structural elements show some minor deterioration.5 - FAIR CONDITION - all primary structural elements are sound but may have minor section loss, cracking, spalling or scour.4 - POOR CONDITION - advanced section loss, deterioration, spalling or scour.3 - SERIOUS CONDITION - loss of section, deterioration, spalling or scour have seriously affected primary structural components. Local failures are possible. Fatigue cracks in steel or shear cracks in concrete may be present.2 - CRITICAL CONDITION - advanced deterioration of primary structural elements. Fatigue cracks in steel or shear cracks in concrete may be present or scour may have removed substructure support. Unless closely monitored it may be necessary to close the bridge until corrective action is taken.1 - "IMMINENT" FAILURE CONDITION - major deterioration or section loss present in critical structural components or obvious vertical or horizontal movement affecting structure stability. Bridge is closed to traffic but corrective action may put back in light service.0 - FAILED CONDITION - out of service - beyond corrective action.UBIT - Under Bridge Inspection Truck. This indicates the bridge needs special equipment in order to reach portions of the structure for inspection.ADT - Average Daily Trafficiv145 Table of Contents Executive Summary ii Forward iii Quick Reference Data Summary iv Bridges Recommended for Replacement/Rehabilitation 1 Bridges Recommended for Major Maintenance 2 Posted Bridges 3 Bridges Recommended for Rail Retrofit 4 Bridge Repair Recommendations 5 ADT (Average Daily Traffic)6 Bridges Maintenance and Repair History 7 i146 Executive Summary The City currently has ownership of 24 bridges (16 traffic bearing and 8 pedestrian). Of those, two are jointly owned jurisdictional bridges with shared ownership between the City of Renton (Grady Way) and the City of Kent (S 196th/200). The different types of bridge configuration vary from steel truss, pre-cast concrete girders, cast-in-place concrete girders, steel girder, wood girder, and steel tied arch spans. The City owned bridges follow the National Bridge Inspection Standards (NBIS). The collected information is maintained in the National Bridge Inventory (NBI) database which is maintained be the Federal Highway Administration (FHWA), which enables state-level and national-level analyses and reporting, supports Federal funding programs, and facilitates the identification of freight and defense-critical corridors and connectors. By having a complete and thorough inventory, an accurate report can be made to the Congress on the number, condition, and performance of the Nation’s bridges. WSDOT uses a state owned data collection system, BridgeWorks, where the City owned bridge inspection information is uploaded after each inspection. WSDOT processes the information and submits the bridge infomation to the FHWA for the entire state. ii 147 Bridge NumberBridge Name Location ReasonTukwila 1442nd Ave South*Allentown (42nd Ave) Deteriorating Structural Condition of the steel superstructureBridges Recommended for Replacement or RehabilitationNote: See individual bridge reports in Public Works for detailed repair work. * The City has been awarded three grants from PSRC, Move Ahead Washington, and the Local Bridge Program1148 Bridge NumberBridge NameLocationReasonTukwila 12Boeing Access Road over BNRRBoeing Access Road Replacing concrete deck as part of the BAR overlayTukwila 16South 119th Pedestrian Bridge119th St (Allentown)Painting/Epoxy of entire structure with possible rot repair as encountered. Tukwila 18Green River Pedestrian and UtilityInterurban Trail near 180thRehabilitation of structure coating and timber rot repair and replacementBridges Recommended for Major Maintenance2149 Bridge NumberBridge NameLocationReasonTukwila 03Lois T Newton (Strander Blvd) SouthcenterBridge is posted for reduced weight for single vehicle three axle ladder fire trucks.Tukwila 1442nd Ave SouthAllentown Bridge is posted for reduced truck speed and posted for reduced loading on AASHTO Type 3 trucks and 6 and 7 axle vehicles.Posted BridgesNote: See individual bridge reports in Public Works for detailed repair work.3150 Bridge NumberBridge NameLocationReasonTukwila 1MacadamMacadam RoadProvide Guardrail, terminal and transitions that meet current standardsTukwila 2Frank Zepp180th StreetProvide bridge rail that meet current standardsTukwila 3Lois T NewtonStander BoulevardProvide bridge rail, guardrail, terminal and transitions that meet current standardsTukwila 6Foster 56th Ave South56th Avenue SouthProvide bridge rail, guardrail, terminal and transitions that meet current standardsTukwila 8Grady WayGrady WayProvide Guardrail, terminal and transitions that meet current standardsTukwila 9East Marginal WayEast Marginal WayProvide bridge rail, guardrail, terminal and transitions that meet current standardsTukwila 11Boeing Access Road - Airport WayBoeing Access RoadProvide bridge rail, guardrail, terminal and transitions that meet current standardsTukwila 13Beacon Ave SouthVictor StreetProvide bridge rail, guardrail, terminal and transitions that meet current standardsTukwila 1442nd Avenue South42nd Avenue SouthProvide Guardrail, terminal and transitions that meet current standardsBridges Recommended for Rail RetrofitNote: See individual bridge reports in Public Works for detailed repair work.4151 Bridge Number Name Year Built Structure ID ADT Next ADT Reqd (5 yr Cycle) Tukwila 01 Macadam Road 1997 08674200 3,600 2026 Tukwila 02 Frank Zepp 1968 08561400 36,000 2027 Tukwila 03 Lois T Newton 1973 08544400 18,900 2027 Tukwila 05 South-center Blvd 1994 0014269D 10,616 2026 Tukwila 06 Foster 56th Ave 1985 08166200 2,850 2026 Tukwila 07 51st Ave South 1996 08634500 4,600 2026 Tukwila 08 Grady Way 1986 08543600 26,000 2026 Tukwila 09 E Marginal Way 1989 08110200 13,000 2026 Tukwila 11 BAR Airport Way 1952 08001800 40,000 2026 Tukwila 12 BAR BNSF 1945 08002500 40,000 2027 Tukwila 13 Beacon Ave S 1971 7996800 550 2027 Tukwila 14 42nd Ave S 1949 08651500 10,300 2026 Tukwila 15 Pacific Hwy 2000 08651500 22,406 2027 Tukwila 21 Fort Dent Road 1975 08328300 1,150 2025 Tukwila 24 Klickitat 2012 08853600 14,024 2026 4001 196-200th 1998 08712100 17,406 2024 Bridge Average Daily Traffic (ADT) 6152 PRIORITY CODE 'A'PRIORITY CODE 'B'PRIORITY CODE 'C'PRIORITY CODE 'M' Bridge Number Bridge Name Location Repair Recommendations Priority Inspection Date Tukwila 1 Macadam Macadam 1. No repairs recommended at this time.NA 4/26/2023 Tukwila 2 Frank Zepp 180th Street 1. No repairs recommended at this time.NA 4/26/2023 Tukwila 3 Lois Newton Strander Blvd 1. Post height clearance for Green River Trail C 4/6/2023 Tukwila 5 South center Blvd SC Blvd 1. Replace missing block spacer on guardrail post 2. Fix broken light above pile 2c 3. Trim the trees on the north side of the bridge. C B B 8/15/2024 Tukwila 6 Foster 56th Ave S 56th Ave S 1. Fill scour void under SE wingwall 2. Replace expansion joint material 3. Repair damaged guardrail terminal end 4. Replace delineator sign on NE corner B B B C 4/6/2023 Tukwila 7 51st Ave S 51st Ave S 1. Apply deck sealer to prevent ponding water to leak in to the box girders 2. Repair spalls at north expansion joint 3. Investigate waterline in box girder 4. Repair northwest rail terminal 5. Remove trees at Pier 2 B B A B B 4/26/2023 Tukwila 8 (Renton-Tukwila Joint Ownership) Grady Way Grady Way 1. Repair vertical sliding surfaces on columns 2. Repair damage bridge rail (spalling and delamination's) 3. Clean plugged Drains at NW approach 4. Repair pedestrian fencing 5. Clear out material between bearings at Abutment 1 6. Repair metal bridge rail at NW approach 7. Remove vegetation on retaining wall 8. Clear sidewalk debris B B B B B B C C 4/13/2023 Tukwila 9 E Marginal Way E Marginal Way 1. Replace compression seals at expansion joints 2. Develop scour plan 3. Secure access hatch at south side 4. Empty box girder B C A B 4/5/2023 Tukwila 11 BAR Airport Way Boeing Access Road 1. Repair bridge rail damage 2. Roughen approach slabs 3. Replace delineator sign B C B 4/11/2023 Tukwila 12 BAR BNSF Boeing access road 1. Repair the southeast approach rail. 2. Clean bridge deck and sidewalk 3. Repair failed overlay 4. Tighten loose anchor bolts 5. Monitor spalling on girder B C B B B 4/5/2023 Tukwila 13 Beacon Ave South At Victor Street 1. Repair interior lighting.B 4/25/2023 Tukwila 14 42nd Ave S 42nd Ave S 1. Clean out open joints over floor beams thoroughly and fill with a flexible sealant, priority 1 due to corrosion at top flanges of floor beams from leaking joints. 2. Rework the sliding plate expansion joint so it is smooth with sidewalk and patch spalls near panel points, seal open cracks. 3. Replace missing guard rail and terminal at SW comer, replace damaged rail at SE comer, reset NW rail and posts to bring rail up to standard height. 4. Thoroughly pressure wash clean truss of all dirt/algae/guano, prepare surface, paint bridge to encapsulate pack rust and protect truss members. Add bird deterrent at all panel points, upper and lower chords. 5. Replace steel sliding plate expansion joints with either a strip seal with steel header or modular joint to eliminate water intrusion onto steel bearings. 6. Recommend design seismic retrofit steel collar and construct around bearing columns, anchored to cap, then fill tight with epoxy. 7. FRP wrap columns 4 A-C. Reinforce west wingwall. Add quarry spall along abutment 4 and under span 3 to retain fill and discourage transient activity. 8. Replace missing riprap along banks and in front of piers. 9. Recommend raising portals and sways due to the high volume of truck traffic and existing damage to sway members. 10. Replace sliding plates with elastomeric dynamic isolation bearings. 11. Chip any delaminated concrete from exposed rebar, clean and seal exposed bar and patch spalls. Sack honeycombed areas throughout soffit. Shotblast deck surface, patch spalled areas and apply epoxy overlay. 12. Replace broken gas pipe couplers. 13. Unclog deck drains B B B B B B B B B B B B C C 4/30/2024 Tukwila 15 Pacific Hwy Pacific/TIB at Duwamish 1. Repair scour along Green River Trail 2. Arrest channel erosion along the south bank 3. Repair the approach guardrails at the southwest, southeast, and northeast ends 4. Apply epoxy overlay on the bridge deck 5. Spot paint at slice locations to extend paint life 6. Trim brush growing along Ped trail A A B C B B 8/22/2024 Tukwila 16 S 119th Pedestrian S 119th Street 1. Repair warped and twisted deck planks, deck has non-skid coating but timber is still weathered 2. Major rehabilitation or replacement in near future 3. Special inspection requested to inspect the underside of the superstructure 4. Replace areas of top boards 5. Replace bearings at 1A 4A B A A A B 4/17/2023 Tukwila 17 Foster Golf Course Foster GC 1. Monitor bearing movement at Abutment 1 at 2029 inspection 2. Remove blackberry bushes under the bridge 3. Repair leaky irrigation line M C B 4/30/2024 Tukwila 18 Green River Interurban trail near 180th 1. Straighten utility pipe alignment 2. Repair chord patching material debonding 3. Repair and replace rotting timber pedestrian rail 4. Paint entire superstructure 5. Perform in-depth inspection C B B B B 8/15/2024 Tukwila 19 Interurban Trail Interurban Trail 1. No repairs noted NA 8/18/2022 Tukwila 20 180th Ped Interurban trail at 180th 1. Monitor leaching cracks in abutment and retaining walls at the 2026 inspection 2. Remove debris from bearing seat 3. Repair approach settlement 4. Repair broken conduit splices M C B B 9/19/2024 Tukwila 21 Fort Dent Road Fort Dent Road 1. Trim vegetation overhanging along sidewalk 2. Repair/replace wire cover plate at the NE approach 3. Post clearance at trail undercrossing under Span 3 4. Apply epoxy overlay to deck surface C C C B 8/22/2024 Tukwila 22 Fort Dent Trail Interurban trail 1. Trim overgrowing vegetation at approaches 2. Replace missing safety chains at corners of bridge 3. Replace popped bolts at diagonal bracing 4. Smooth out approach pathway at approach header 5. Rope access inspection C C B B B 9/19/2024 Tukwila 24 Klickitat Drive Klickitat Drive 1. No repairs noted NA 4/13/2023 Tukwila 25 Tuk Urban Ped Bridge Green River Trail 1. Align Ped rail in Span 3 B 9/19/2024 Tukwila 26 Riverton Creek Ped Green River Trail 1. No repairs noted NA 8/16/2022 4001 (Kent-Tukwila Joint Ownership)196-200th 196th Street 1. Repair joints and seals 2. Clean deck drains B B 4/7/2023 Note: See individual bridge reports in Public Works for detailed repair work.Bridge Repair RecommendationsHighest Priority - Structural integrity and safety involved.Regular Priority - General bridge structural repair work not requiring immediate response.Low Priority - General minor maintenance or other work to be accomplished as time and funding allow.Monitor - The repair or item described needs to be monitored at the rate indicated in the Repair Recommendations. 5 153 Bridge Number Bridge Name Year Amount Repair/Maintenance Tukwila 2 Frank Zepp 2015 $2.6M Paint steel, deck overlay, replace deck joint, seismic protection Tukwila 6 Foster 56th Ave S 2023 $52k Bridge rail repair Tukwila 6 Foster 56th Ave S 2022 $4.5K Scour report and plan of action performed Tukwila 8 Grady Way 2015 $350K Seismic protection Tukwila 11 Boeing Access Road - Airport Way 2021 $1.6M Siesmic Retro Fit Tukwila 12 Boeing Access Road BNRR 2019 $10M Siesmic Retrofit and deck repair Tukwila 13 Beacon Ave South 2015 $1.1M Replace bridge deck and paint steel Tukwila 14 42nd Avenue South 1994 * Paint Truss Tukwila 14 42nd Avenue South 2017 $17K 42nd Ave S Bridge Structural Assessment Tukwila 14 42nd Avenue South 2020 $39K In-depth inspection beyond the King County inspections Tukwila 16 S 119th St 2015 $100K Paint and timber repair Tukwila 18 Green River 2007 $100K Paint and timber repair Tukwila 18 Green River 2008 $126K Paint and timber repair 4001 196th/200th 2019 $500K Approach Slab repair 4001 196th/200th 2023 $5k Replace center crash barrier 2010 - 2024 Bridges Maintenance and Repair History * Unable to verify cost as project cost data is typical kept for 6 years and project was performed before the City's current project tracking system 7154 Road Services Division Department of Local Services 201 South Jackson Street KSC-TR-0313 Seattle, WA 98104-3856 kingcounty.gov/en/dept/local-services/ January 14, 2025 Adam Cox Transportation Project Manager City of Tukwila 6300 Southcenter Blvd Tukwila, WA 98188 RE: 2024 Inspection of City of Tukwila Bridges Dear Mr. Cox: King County bridge engineers inspect the bridges owned by the City of Tukwila in accordance with agreements between the City of Tukwila and King County Department of Local Services. The bridge inspections for calendar year 2024 were conducted as follows: Routine Inspections: April 30, 2024 Foster Golf Course Pedestrian Bridge No. TUKxPx17 August 15, 2024 SC Blvd. Green River Bridge No. TUKxNx05 Tukwila International Blvd. Bridge No. TUKxNx15 Fort Dent Park Bridge No. TUKxNx21 Green River Ped & Utility Bridge No. TUKxPx18 August 22, 2024 180th Pedestrian Bridge No. TUKxPx20 Fort Dent Trail Bridge No. TUKxPx22 Tukwila Urban Center Pedestrian Bridge No. TUKxPx25 Under Bridge Inspection Truck (UBIT) Inspections: August 20, 2024 Tukwila International Blvd Bridge No. TUKxNx15 Fort Dent Park Bridge No. TUKxNx21 Interim Inspections: April 30, 2024 42nd Avenue South Bridge No. TUKxNx14 Enclosed are the reports from the bridge inspection and the actions recommended to maintain these structures. We submit the data in the report to Washington State Department of Transportation (WSDOT), in accordance with state and federal laws to inform them of the bridge condition and to assure the bridge has been inspected on a timely basis. This information is incorporated into state and federal databases. Bridge inspection reports are divided into three primary sections: Condition/Appraisal Ratings, BMS Elements, and Notes/Repairs/Resources; these sections are briefly explained below: Docusign Envelope ID: DF58196B-9B65-4A6D-800F-C7EADFB35838 155 Adam Cox January 14, 2025 Page 2 1. The first section “Condition/Appraisal Ratings” consists of collections of fields that depict ratings for a variety of bridge related components, including the bridge as a whole. Generally, these ratings depict the current or inherent overall condition of each of these components from 8 (best) to 0 (worst); however, several fields have different or adjusted rating scales. Explanations of these codes and ratings are found in the Washington State Bridge Inspection Manual (WSBIM) [Available online at: https://wsdot.wa.gov/engineering-standards/all-manuals-and-standards/manuals/bridge-inspection- manual]. 2. The second section of the report, Bridge Management System (BMS) Elements, quantifies each of the primary bridge elements and rates them, breaking down the condition of each component into categories that indicate how widespread a component is deteriorated. Generally, Condition State CS1 is best and CS4 is worst. 3. The third section consists of three parts: Notes, Repairs, and Inspection Resources Required. The Notes section is comprised of information that provides details of the numbered fields in the first two sections. The Repairs section includes recommended actions identified from the bridge inspection, prioritized between 1 - High priority, and 3 - Low priority. The Resources Required section indicates any special equipment or tools used to inspect the bridge. You may notice that the bridge inspection reports appear slightly different than that of previous years, particularly in Section 1. As you may be aware, the Specifications for the National Bridge Inventory (SNBI) was adopted in 2022 and brings significant changes in bridge inspection reporting requirements. In total, there are 174 changes including 54 new fields, 100 modified fields, and 20 existing fields to be discontinued. These reporting metrics will be fully in effect in 2026. In order to make these changes across all assets, we are incorporating the 4-year plan suggested by FHWA and adopted by WSDOT. King County has been implementing the changes according to this plan since the start of 2023; however, there are upcoming changes that require input / action from the asset owner and is unable to be done solely by our inspection team. Here’s what we’ll be needing from your agency to effectively fill out a complete inspection report: 1. Historical Significance (SNBI Item ID B.CL.04): a. If applicable: i. Year structure entered historical register. ii. Which registers the bridges are on. b. Any bridges in consideration to be placed on a register. 2. Seismic Vulnerability (SNBI Item ID B.AP.05): a. Cities should have their own policies for determining whether a bridge has been designed or retrofitted for seismic countermeasures. We can send examples of what qualifies as a seismic countermeasure under King County design, if you wish to adopt our policy. Alternatively, you can refer to the FHWA Seismic Retrofitting Manual for assessment guidance. 3. Scour Vulnerability (SNBI Item ID B.AP.03): a. Scour evaluations are required for all bridges over water, regardless of scour condition code. 4. Scour POAs (SNBI Item ID B.AP.04) a. A Scour Plan of Action needs to be developed for all scour critical bridges. This form can be completed without the need for a scour engineer. 5. Overtopping Likelihood (SNBI Item ID B.AP.02): a. If the City can provide overtopping likelihood or historical information, it would greatly assist in filling out this field accurately. Our inspection team can produce a rating, but it will take significantly more work (research, historical data, etc.). Docusign Envelope ID: DF58196B-9B65-4A6D-800F-C7EADFB35838 156 Adam Cox January 14, 2025 Page 3 6. AADT/AADTT counts (SNBI Item IDs B.H.09 / B.H.10 / B.H.11): a. All roadway bridges report AADT and AADTT every 4 years – it would be optimal to get updated counts scheduled prior to the next inspection cycle so they can be reported when the routines inspections are due. 7. Roadside hardware crash test documentation (SNBI Item IDs B.RH.01 / B.RH.02) a. If the City is using roadside hardware that is non-standard or proprietary, we need crash test documentation for it. This applies to both the bridge rails and transition rail. 8. Bypass detour length (SNBI Item ID B.H.17) a. Since our team is not always familiar with city road and traffic restrictions, it is not always feasible for us to accurately calculate the detour length. If it becomes necessary for the city to close a bridge, a detour plan should be available. i. The detour length is defined as the total distance for a vehicle to return to the original route. ii. The detour route cannot have weight restrictions lower than the applicable bridge or any vertical clearance limits under 14’-3” or lower than the applicable bridge (whichever is lower). 9. Load Rating a. Anytime the City updates a load rating for a bridge, it is required for us to update the bridge file with the new rating and to keep a copy in the bridge records. b. Load ratings may need to be revisited if condition ratings change. c. WA-105 Load Rating Update: New WSDOT guidance has updated load rating requirements with a new state legal truck. The State has provided a preliminary review of the existing load ratings of local agency structures and provided a list of structures that may require an updated load rating by 2026. Both the design memorandum and preliminary review list with your agency’s affected structures are attached. Attached is a form fillable excel file with the applicable options for each field and a collection of excerpts from the WSBIM for reference for how these topics need to be coded on the inspection reports. While this information is not due until 2027, if we are able to obtain this information sooner, we are able to update these reports along with their scheduled routine inspections. We know that this is a lot of information and some of it can be quite complicated – if it would be helpful, our team would be happy to schedule some time to discuss specifics with you directly. I hope this letter helps you in reviewing these inspection reports. We recommend the City of Tukwila bridges continue to be routinely inspected on a 24-month schedule. Our next scheduled bridge inspection in the City of Tukwila will be in the spring of 2025. Please call Henry Jin at 206-263-7988 if you need any additional information. We appreciate assisting your city with bridge engineering and inspection services. Sincerely, Larry Jaramillo, P.E. Managing Engineer Bridge and Structural Design Unit Docusign Envelope ID: DF58196B-9B65-4A6D-800F-C7EADFB35838 157 Adam Cox January 14, 2025 Page 4 Enclosures: 1. Form Fillable SNBI Input Spreadsheet: SNBI_FourYearDataPlan – CITY.xlsx 2. Selected Excerpt from WSBIM 2024: SNBI Pages from WSBIMCoding.pdf 3. City of Tukwila Recommended Actions Matrix: 2024 REPAIRS TUKWILA.pdf 4. WSDOT Design Memorandum 2024-05: 2024-05-BDM-Memo.pdf 5. Preliminary Review to Load rate for WA-105 List: Preliminary Review WA-105 – Tukwila.pdf 6. City of Tukwila 2024 Bridge Inspection Reports – OneDrive Link cc: Rey Sugui, Program Analyst, Road Services Division (RSD), Department of Local Services (DLS) Jessy Jose, Supervising Engineer, Bridge and Structural Design Unit, RSD, DLS Henry Jin, Engineer III, Bridge and Structural Design Unit, RSD, DLS Justin Chan, Engineer III, Bridge and Structural Design Unit, RSD, DLS Docusign Envelope ID: DF58196B-9B65-4A6D-800F-C7EADFB35838 158 159 CITY OF TUKWILA CAPITAL PROJECT SUMMARY 2025 to 2030 PROJECT:Annual Bridge Inspections and Repairs Project #70010402 Project Manager Adam Cox Department Arterial Streets DESCRIPTION: JUSTIFICATION: STATUS: MAINTENANCE IMPACT: COMMENT: FINANCIAL (in thousands) 2025 2026 2027 2028 2029 2030 Beyond TOTAL Project Costs Project Mgmt (Staff Time/Cost) 2$ 2$ 2$ 2$ 2$ 2$ 2$ 14$ Construction 100$ 220$ 230$ 235$ 240$ 240$ 240$ 1,505$ Total Project Costs 102$ 222$ 232$ 237$ 242$ 242$ 242$ 1,519$ Project Funding Fund Balance 102$ 222$ 232$ 237$ 242$ 242$ -$ 1,277$ Total Project Funding 102$ 222$ 232$ 237$ 242$ 242$ -$ 1,277$ Ongoing program of bi-annual inspections, repairs, painting and rehabilitation of the 26 City vehicle and pedestrian bridges. Federally required program identifies safety or repair needs in the early stages to minimize hazards and costs. The number of bridge inspections necessary each year can vary year to year. Inspection frequencies vary from bridge to bridge and King County has provided some inspection services. Construction projects will be determined from inspection reports and noted deficiencies/problems. N/A Ongoing project, only one year actuals are shown in the first column. 2025 - 2026 Biennial Budget City of Tukwila, Washington 43160