Funding Application. Project Information. Contact Information. Project Description. 1 of 11. April 18th, :12 PM

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1 1 of 11 Funding Application Competition Application Type Status Submitted: Prepopulated with screening form? Regional FHWA Corridors Serving Centers submitted April 18th, :12 PM No Project Information 1. Project Title SeaTac Access SR 509 Stage 1 from I-5 to 28th/24th 2. Regional Transportation Plan ID Sponsoring Agency WSDOT 4. Cosponsors Port of Seattle 5. Does the sponsoring agency have "Certification Acceptance" status from WSDOT? Yes 6. If not, which agency will serve as your CA sponsor? N/A Contact Information 1. Contact name Craig Stone 2. Contact phone (206) Contact StoneC@wsdot.wa.gov Project Description 1. Project Scope SeaTac Access is the first stage of SR 509 Corridor Completion as envisioned in Regional Transportation Plan project It provides independent utility from future Stage 2 as it connects the recently completed 28th Avenue South/24th Avenue South corridor into Interstate 5 and prepares the corridor for connection into Sea-Tac Airport as shown in Exhibit 1. A four-lane limited access connection is constructed to and from the south on Interstate 5 with ramps to 28th/24th Avenue South as shown in Exhibit Project Justification, Need, or Purpose The project provides regional connectivity into the south end of the SeaTac Regional Growth Center. Traffic volumes from growth of the Airport and development in the RGC are reduced on S. 188th Street, International Boulevard and S. 200th Street, where neighborhood impacts have long been a concern. The Corridor is prepared for the final Stage 2 project to be constructed beginning in Construction is coordinated with Link Light Rail following a parallel route in this area. The project further supports the Angle Lake District Station Area

2 parallel route in this area. The project further supports the Angle Lake District Station Area 2 of 11 Plan, one of three distinct communities where the City of SeaTac plans to focus urban growth. Variable rate tolling that varies by time of day, with higher rates during the peak periods will help to ensure efficient traffic flow through pricing and generate revenue to support project costs. Provides connection from I-5 to new 28/24th Avenue South arterial, a new principal arterial road corridor between South 188th Street in SeaTac and South 216th Street in Des Moines that will help relieve congestion on International Boulevard (SR99). The $14 million construction project was jointly funded by the City, the Port of Seattle, Sound Transit, the State of Washington Department of Transportation, Freight Mobility Strategic Improvement Board, and The Transportation Improvement Board. The new road will also provide access from the south to both Sea-Tac International Airport, the newly opened Sound Transit Angle Lake Light Rail Station and its 1000-plus stall parking garage. In addition, the new road provides access to businesses in the Des Moines Creek Business Park and opens access to large tracts of property for development. Local officials estimate that over 4 million square feet of new development can be facilitated due to the completion of this principal arterial road corridor. More than 1.5 million square feet of mixed use commercial and residential development is currently under the master plan. Over the next 20 years, this corridor will help support development resulting in approximately 15,500 jobs and a projected total direct economic impact of $32,6 Million for the City of SeaTac. The Connecting Washington budget provided full funding for the WSDOT share of the Puget Sound Gateway Program, but the legislature prioritized funding based in part on a commitment by local agencies to raise $130 million toward the total program (SR 509 and SR 167 corridors). To meet the legislature s expected local contribution, agencies with the greatest project benefit have committed their own funds for grant match and need to raise additional funding from grants. All match and grant funding offsets the legislature s local participation target without reducing Connecting Washington funding. Grant funding is intended to contain direct local agency contributions within a feasible level to ensure a successful partnership, one that can gain the approval of each local council/commission. The Gateway local funding partnership includes sixteen cities, two counties and two port districts. As of the date of application, these local agency partners have committed more than $72 million toward match. Project Location 1. Project Location Connection Between I-5 and 28th Avenue South/24th Avenue South 2. Please identify the county(ies) in which the project is located. King 3. Crossroad/landmark nearest the beginning of the project I-5 in the South 4. Crossroad/landmark nearest the end of the project 28th/24th Avenue South in the North 5. Map and project graphics Exhibit_1_-_SeaTac_Access_Vicinity_Map.pdf, Exhibit_2_-_SeaTac_Access_Project_Map.pdf, Exhibit_3_-_SeaTac_Access_Travel_Time_Paths.pdf Plan Consistency 1. Is the project specifically identified in a local comprehensive plan? Yes 2. If yes, please indicate the (1) plan name, (2) relevant section(s), and (3) page number where it can be found. SeaTac Access (SR 509 extension Stage 1) is called out in the SeaTac Comprehensive Plan Policy 4.2C, page T-12 and Map 4.1, page T-11. Policy 2.1A designates Angle Lake Station Area as one of three distinct communities where SeaTac plans to focus the majority of commercial and residential growth. 3. If no, please describe how the project is consistent with the applicable local comprehensive plan, including specific local policies and provisions the project supports. In addition, please describe how the project is consistent with a transit agency plan or state plan, if applicable. N/A Federal Functional Classification

3 1. Functional class name 32 Proposed Principal Arterial - Expressway 3 of 11 Support for Centers 1. Describe the relationship of the project to the center(s) it is intended to support. For example, is it located within a designated regional, countywide or local center, or is it located along a corridor connecting to one of these areas? The project directly connects the SeaTac Regional Growth Center to the regional highway system. The south half of the Regional Growth Center is under developed, but well positioned for airport related commercial and increased housing density. Traffic access and nonmotorized access are constrained by limited arterial connectivity and gaps in sidewalk and bike lane connectivity. Bicycle infrastructure is minimal. Transit access greatly improved in recent years with opening of the Angle Lake Link Light Rail Station. Improved connectivity to the regional transportation system positions the Angle Lake Station Area plan for development. The project improves nonmotorized access at connections to surface streets, but nonmotorized travel is prohibited on SeaTac Access itself. Sidewalks and a shared use trail were already constructed with WSDOT project funds at the future SeaTac Access/28th Avenue S interchange. WSDOT is also paying for connection of the Lake to Sound Trail to Des Moines City Center with Puget Sound Gateway funds. Criteria: Benefit to Regional Growth or Manufacturing/Industrial Center 1. Describe how this project will benefit or support the housing and employment development in a regional growth center(s) and/or employment growth in a manufacturing/industrial center(s). Does it support multiple centers? Please provide a citation of the relevant policies and/or specific project references in a subarea plan or in the comprehensive plan. The extension of the new SR 509 alignment from I-5 to the recently completed 28th/24th Avenue S corridor provides benefits to both the residential and employment growth of the SeaTac Regional Growth Center (RGC) by improving accessibility to Sea-Tac International Airport to support growth, and mitigating traffic volumes and congestion along International Avenue (SR 99) to promote desired infill and redevelopment. The growth experienced by Sea-Tac Airport has been significant. About 46.9 million air passengers passed through the airport in 2017, a 2.6% increase from the previous year, and projections suggest that by 2027 this will grow to 56 million passengers annually, and to 66 million by This growth will require significant increases in the capacity of transportation networks servicing the Airport, with improvements in access from the north and south. As activity at the Airport is strongly linked with businesses in the SeaTac RGC. According to the 2013 PSRC Regional Centers Monitoring Report, about 12,886 employees work in the MIC. A majority of these employees are related to the Airport. Longitudinal Employer-Household Dynamics data from the US Census for 2015 indicates that almost 56% of the employment in the RGC is associated with Transportation and Warehousing, with an additional 21% in Accommodation and Food Services. Future growth will provide more employment in these industries for the community. However, the City of SeaTac is also interested in providing a more balanced, sustainable approach for long-term growth. The design of International Boulevard and the large block structure in the downtown supports a more auto-oriented urban structure, with surface parking lots that are inefficient, low-intensity land uses for a major center. The local light rail station and the potential for significant traffic diversion from International Boulevard and other local streets provide the opportunity to develop denser residential and commercial infill projects that are walkable and oriented towards transit. This is a core principle of the SeaTac City Center Plan, and considers that well-planned high-intensity commercial uses (office/retail) on International Boulevard and high-amenity mixed-use and residential projects in other areas of the Center will benefit from transit links and reduced traffic congestion due to travelers moving to and from the airport. (See Goal 1 of the City of SeaTac City Center Plan, and its associated policies.) The City of SeaTac has noted the SR 509 Completion Project as part of the Transportation Element of the Comprehensive Plan. Policies 4.2C and 4.2F state that the City will support and work with WSDOT, the Port of Seattle, and other partners on funding and constructing Phase 1 of the SR 509 project by 2025 and Phase 2 by The SR 509 Completion Project is also listed in the Transportation Master Plan under MP-043, as a project managed by WSDOT. 2. Describe how the project provides or benefits a range of travel modes to users traveling to/from centers, or if it provides a missing mode. The project effectively mitigates growth of freight and general traffic associated with

4 The project effectively mitigates growth of freight and general traffic associated with densification of the SeaTac Regional Growth Center because the direct connection to the regional highway system reduces traffic impacts on the local neighborhoods. 4 of 11 The project greatly improves station area access to Link Light Rail. Current station access follows S. 200th Street through a residentially developed area where growing traffic has long been a concern. The connection of the project into the local system occurs just south of Angle Lake station. The future extension of Link Light Rail parallels the project right of way and construction coordination between WSDOT and Sound Transit is ongoing. Right of Way acquisition is coordinated to expedite both projects. Nonmotorized access along the project does not offer utility because of the direct connection into Interstate 5, however, nonmotorized mitigation is transferred into a new north-south regional shared use path called the Lake to Sound Trail, implemented through a separate project under design by King County with WSDOT project funding. 3. Describe how the project will benefit a variety of user groups, including commuters, residents, and/or commercial users. Growth in the SeaTac Regional Growth Center and Angle Lake Station Area place significant burden on S. 200th Street to provide access to Interstate 5. The project reassigns commercial and commuter traffic producing a 22 percent reduction in traffic volume on S. 200th Street in 2025 compared to no build. This allows growth in the Regional Center to occur with reduced impacts on the local neighborhood, resulting in significant social justice benefits as discussed in question 4 below. The residents surrounding S. 200th Street have expressed concern about traffic growth and pedestrian safety for decades. Access to Link Light Rail to and from the south is a recent and growing need. The Station represents a primary point of transit accessibility to the local area and South King County/Pierce County region. When Light Rail is extended south, development of the Station Area will fill in the demand to transit access to serve the growing center. Recent development of the Des Moines Industrial Park and opening of the regional FAA headquarters simultaneously increased commuter traffic and neighborhood impacts. The project reorients truck and commute trips from the new industrial park onto the regional system instead of multiple local arterials. 4. Describe how the project will benefit minority and low-income populations as identified in the President s Order for Environmental Justice, seniors, people with disabilities, those located in highly impacted communities, and/or areas experiencing high levels of unemployment or chronic underemployment; please be specific and provide data where applicable. The project would shift freight traffic from S. 200th Street in SeaTac to the new SR 509 facility, which would relieve local traffic congestion. This would benefit residents who live in the neighborhoods within 0.5 mile of the section of S. 200th Street that will experience improved traffic congestion because of the project (the project area). We conducted a demographic analysis of these neighborhoods and determined that populations identified in the President s Order for Environmental Justice (people who identify as minority and individuals with incomes below the federal poverty level), seniors, and people with disabilities live in these neighborhoods. We also identified highly impacted communities and communities experiencing high unemployment within the project area. According to EJScreen, an online database provided by the U.S. Environmental Agency, there are three census block groups within the project area that have substantial minority populations: 74 percent, 58 percent, and 84 percent. This is much more than King County, where 36 percent identify as minority. Much of the project area is within a census tract that has a substantial percentage of individuals with incomes below the poverty level (34 percent). This is more than triple that of King County (10.7 percent). There are fewer seniors defined by the U.S. Census Bureau as individuals age 65 years and older in the project area than in King County (12.2 percent), but one census block group has more than 14 percent seniors. Most census tracts within the project area have at least 11 percent of individuals living with a disability. This is more than King County (9.6 percent). The Puget Sound Clean Air Agency defines highly impacted communities as geographic locations characterized by degraded air quality, whose residents face economic or historic barriers to participation in clean air decisions and solutions. More than 40 percent of the project area is considered highly impacted by the Puget Sound Clean Air Agency Three census block groups have unemployed civilian populations well above King County (5.5 percent) unemployment rates: 10 percent, percent, and percent. In addition, an analysis of the Puget Sound Regional Council s Opportunity Index, a composite measure of five key elements of opportunity at the census tract level, indicated the project area is

5 five key elements of opportunity at the census tract level, indicated the project area is considered low opportunity. 5. Describe how the project will support the establishment of new jobs/businesses or the retention of existing jobs/businesses including those in the industry clusters identified in the adopted regional economic strategy. The project will support opportunities to recruit and retain businesses in the area by providing a direct airport route to and from the south via I-5, providing additional road capacity for improved access. This can be essential in reducing travel times into and out of the Airport for passengers and air cargo, and supporting ongoing growth in air traffic. As Sea-Tac International Airport is a critical amenity for national and international air travel, key economic activities in the area are directly related to the support of these functions. Air Transportation is a critical component in the Transportation & Logistics category, with both passenger and cargo services as important components of this sector. Ongoing expansion efforts, such as the North Satellite Modernization Project, the proposed International Arrivals Facility, and the Central Terminal Renovation Project, all are directed towards increasing capacity to meet future growth needs, which will require comparable improvements in transportation access. This growth will also result in a significant increase in employment and support businesses in the area. The Airport and businesses in the area also provide services that support the Tourism sector, with significant activity in Accommodation and Food Services related to hotels and restaurants within and outside of the Airport. Retaining and developing local employment in these industries would be supported by ongoing growth at the Airport. Although these businesses are not directly situated in the industries comprising this cluster, they do provide key services for tourists and other visitors to the region. There are broader implications for future change in local employment and businesses as well. The development of I-5 access ramps at 28th/24th Avenue S will provide support for infill and redevelopment opportunities in the SeaTac City Center, primarily along International Boulevard, as well as areas in north Des Moines in Des Moines Creek Business Park. This has already resulted in growth in Transportation & Logistics firms in Des Moines. Increased intensities of commercial development in the SeaTac City Center would also be supported, which could result in further growth and a diversification of the economic base of the SeaTac RGC. Criteria: System Continuity/Long-Term Benefit and Sustainability 1. Describe how this project supports a long-term strategy to maximize the efficiency of the corridor, including TDM and activities and ITS improvements that use advanced technologies or innovative approaches to improve traffic flow. Describe the problem and how this project will remedy it. SeaTac Access and the future Stage 2 of the SR 509 corridor will employ tolling that varies by time of day, with higher rates during the peak periods helping to ensure efficient traffic flow through pricing. Tolling will employ detection technology to avoid traffic delays from manual cash toll collection. In addition to more direct access, reducing travel distance by a quarter mile from 2 to 1.75 miles, SeaTac Access will provide substantial travel times savings, specifically during the peak periods as shown in Exhibit 3. Based on forecast Synchro intersection modeling results in 2025 for the project area, the SeaTac Access improvement will result in a reduction in travel time in the AM Peak for trips travelling from I-5 South of Sea-Tac to Sea-Tac on S. 200th Street from 8.8 minutes to 8.4 minutes while trips using the SeaTac Access improvement will see travel times reduced to 3.2 minutes. Southbound during the AM Peak on the same route, travel times will increase slightly on S. 200th Street as some projected trips will continue to use S. 200th Street as the free alternative to tolling on SeaTac Access. Travel times will increase from 4.6 minutes to 4.8 minutes, however SeaTac Access will provide a travel time savings of 54 percent reducing trip time to 2.5 minutes. During the PM Peak the greatest reduction in travel time will be for trips traveling South from Sea-Tac to I-5. Average travel times on the current S. 200th Street route will reduce from 7.3 minutes to 6.1 minutes with the improvement while trips on SeaTac Access will be 3.6 minutes. Trips going northbound during the PM peak will see no change in travel time on S. 200th Street remaining at 5.2 minutes while trips on SeaTac Access will be 2.8 minutes. 2. Describe how this project provides a logical segment that links to a regional growth or manufacturing/industrial center. The new alignment of SR 509 between SR 99 and SR 509 has been designated as a Critical Urban Freight Corridor in Washington State, which is part of the National Highway Freight Network (NHFN). Those new alignments are recognized as having national significance for freight movement through such designations. NHFN network was established under FAST Act to strategically direct federal resources, and used to determine funding eligibility for the INFRA Grant program. Additional information can be found in Appendix A of 2017 State Freight System Plan: 5 of 11

6 The project connects the Growth Center, Station Area and airport area to the region. SeaTac Access is required to complete a future planned connection into the Sea-Tac International Airport drives. The recently developed 28th/24th Avenue South corridor forms the spine of the southern portion of the SeaTac Regional growth center. Growth in the Center and Station Area need improved access to 28th/24th Avenue to encourage development while reducing impacts on existing neighborhoods. 3. Describe how the project fills in a missing link or removes barriers to/from a center. State Route 509 south is a primary missing link in the regional highway system. The current project makes the connection of the SR 509 corridor into Interstate 5, preparing the route for closure of the final gap. In the meantime, SeaTac Access provides independent utility by connecting the SeaTac Regional Growth Center and Angle Lake Station Area into the regional highway system. Growth of the Center and Station area will be both enhanced and mitigated. 4. Describe how this project will relieve pressure or remove a bottleneck on the regional transportation system and how this will positively impact overall system performance. One of the primary beneficiaries of the SeaTac Access project will be freight traffic moving to and from I-5 to Sea-Tac Airport and surrounding distribution facilities. Based on forecast dynamic traffic assignment model results for 2025, without the SeaTac Access improvement South 200th Street, which serves as the primary connection to I-5, will handle approximately 1,300 vehicles during the three-hour peak periods in the peak directions and 5,600 vehicles eastbound and 3,900 vehicles westbound over a 24-hour weekday. Approximately 15 percent of vehicles travelling the corridor are commercial trucks. With the Sea-Tac Access improvement volumes on S. 200th Street reduce by 15 percent in the eastbound direction and 23 percent in the westbound direction during the AM peak period and during the PM peak periods stay the same eastbound but go down by 53 percent in the westbound direction. During a full weekday, overall volumes in both directions will decrease by 22 percent with the SeaTac Access project. Significant reductions in traffic on S. 200th will greatly improve travel time reliability, improve safety, reduce emissions, and offer improved access to the Angle Lake Link Light Rail station for the local and regional community. 5. Describe how this project addresses safety and security. The study area for determining safety impacts of this project include those trips destined to and from I-5 and connecting the south end of Sea-Tac Airport and nearby Regional Growth Center via S. 200th Street. The following are the most recent five-year crash statistics for the nearby section of I-5 (Milepost 150 to ) and S. 200th Street, between I-5 and 28th Avenue S. For the period of five-year analysis period ( ), there were a total of 289 accidents on this section of I-5. The predominant accident type was rear end collisions (49 percent of total), followed by sideswipes (25 percent), other collisions (14 percent) collisions with fixed objects (10 percent), and overturned vehicles (2 percent). There was one fatality (2017) and one serious injury (2017) on this segment of I-5 over the five-year period. While total accident rates at this location were relatively steady between 2013 and 2016, this section of I-5 saw a doubling of accidents from 2016 to 2017 (47 to 94 incidents). Of the 94 accidents in 2017, 47 percent of these were rear-end collisions. Next highest were sideswipe collisions (22 percent), fixed object collisions (14 percent), and other collisions (13 percent). There was a total of 75 accidents on S. 200th Street, between the I-5 interchange and 28th Avenue S. for the five-year analysis period ( ). The predominant accident type was other collisions (32 percent of the total), opposite collisions (20 percent), sideswipe collisions (19 percent), rear end collisions (16 percent), collisions with fixed objects (11 percent), and overturned vehicles (2 percent). There were no fatalities and one incident in 2016 with a serious injury on this segment of S. 200th Street over the five-year period. The S. 200th Street traffic signal at 32nd Avenue S was installed historically due to safety concerns. The reduction in future traffic volumes on S. 200th Street provide significant local benefits. This segment of S. 200th Street has seen a progressive increase of the number incidents in the last three years. There were 12 incidents in 2015, 19 in 2016, and 23 in Of the 23 accidents in 2017, there were six sideswipe collisions and six other type of collisions, five rear end and opposite collisions, one collision with a fixed object. The Sea-Tac access project will likely lead to an improvement in safety for trips traveling on S. 200th Street as many trips that used to travel this route will likely divert to the new limited access roadway connection. While S. 200th Street is seeing a recent uptick in incidents, reduced congestion and lower volumes will reduce the risk of collisions on this arterial. 6. Describe how the project provides opportunities for active transportation that can lead to public health benefits. Nonmotorized access is prohibited on the SeaTac Access mainline because it is an access 6 of 11

7 Nonmotorized access is prohibited on the SeaTac Access mainline because it is an access restricted expressway and connects directly into Interstate 5, where nonmotorized travel is also prohibited. The project previously paid for a shared use pathway at the intersection of the project with 26th Avenue S. Additional pedestrian and bicycle improvements for the SeaTac Access project are constructed under a separate initiative to complete The Lake to Sound Trail from Burien to Des Moines. WSDOT is funding a portion of that facility through the SeaTac Access project and the trail is being implemented through a partnership with King County Parks. Air Quality and Climate Change: Element Selection 1. Please select one or more elements in the list below that are included in the project s scope of work, and provide the requested information in the pages to follow. Roadway Improvement Air Quality and Climate Change: Roadway Improvement 1. What is the length of the project? Approximately 2.5 miles 2. What is the average daily traffic before and after the project? 7,800 vehicles per day 3. What is the average speed before and after the project? Average speeds on the SeaTac Access improvement are forecasted to be 37.6 mph compared to 19.8 mph using the current comparable routes on I-5 and 200th Street. Current congestion levels on I-5, specifically during the peak periods, is the primary contributor to lower overall average speeds. In addition to improved, and direct highway access, the SeaTac Access improvement will have tolling which will help to limit congestion and travel time delays on the facility and maintain higher average speeds. 4. What is the average daily transit ridership along the corridor? N/A 5. How many daily peak period transit trips serve the corridor? N/A 6. What is the expected increase in transit speed due to the BAT/HOV lanes? N/A 7. What is the expected increase in transit ridership due to the BAT/HOV lanes? N/A 8. What is the percentage of freight truck traffic on the facility? 15 percent 9. Will the project result in shorter trips and reduced VMT? If so, please explain. The project will result in shorter trips and reduced VMT due to the new limited access connection to I-5. The direct connection will reduce trip lengths by 0.32 miles, thereby reducing VMT and air pollutant emissions from vehicle exhaust. Approximately 15% of vehicles using this connection are heavy diesel trucks, and the shortened trips will result in a significant reduction of greenhouse gases, diesel particulate, and other criteria air pollutant emissions. The shortened travel distance will result in a reduction of 2,496 VMT, as compared to the no build scenario. Using the values in the PSRC project level emissions evaluation tool, this would result in air pollutant emissions reductions of 1,261 kg/day of CO2, 7.2 kg/day of CO, 0.15 kg/day of PM2.5, 3.0 kg/day of NOX, and 0.4 kg/day of VOC. 10. Please describe the source of the project data provided above (e.g., Environmental Impact Statement, EPA/DOE data, traffic study, survey, previous projects, etc.). The volume and truck percent estimates were obtained from Synchro traffic modeling for the Puget Sound Gateway Program. The reduced trip distance was estimated from project maps. The VMT and emissions savings were calculated using the PSRC project level emissions evaluation tool, assuming a project opening year of 2026, 15% trucks, and the volume and trip length described in the previous section. This conclusion is consistent with the environmental consequences presented in the SR 509 NEPA Re-evaluation competed in January The Transportation Technical Report includes details about freight routes, and the analysis shows that travel times for freight traffic will be reduced along all the roadways analyzed as part of the overall project. Improved truck travel times and lower delays result in localized reductions of pollutant emissions, specifically exposure to diesel particulate matter in the immediate project vicinity. The Air Quality 7 of 11

8 exposure to diesel particulate matter in the immediate project vicinity. The Air Quality Technical Report shows that regional air emissions decrease by 1 to 3 percent as compared to the no build scenario, depending on the specific pollutant. 8 of 11 PSRC Funding Request 1. What is the PSRC funding source being requested? STP 2. Has this project received PSRC funds previously? Yes 3. If yes, please provide the project's PSRC TIP ID Previously received non-construction funds through TIP ID WDOUM-6. Currently in the TIP as WDNW Phase Year Alternate Year Amount construction $4,500, Total Request: $4,500, Total Estimated Project Cost and Schedule PE Funding Source Secured/Unsecured Amount State Gas Tax Secured $14,400, Expected year of completion for this phase: 2022 ROW Funding Source Secured/Unsecured Amount $14,400, State Gas Tax Secured $42,800, Local Secured $2,000, Expected year of completion for this phase: 2020 Construction Funding Source Secured/Unsecured Amount $44,800, Local Secured $500, State Gas Tax Secured $170,900, STP Unsecured $4,500, Expected year of completion for this phase: 2026 Other $175,900, Funding Source Secured/Unsecured Amount State Gas Tax Secured $38,200, Expected year of completion for this phase: 2026 Summary 1. Estimated project completion date $38,200,000.00

9 March Total project cost $273,300, of 11 Funding Documentation 1. Documents Exhibit_4_-_WSDOT_Funding_Support_Details.pdf, Exhibit_5_- _WSDOT_LEAP_Funding_Support.pdf, Exhibit_6_-_SeaTac_Funding_Support.pdf, Exhibit_7_- _Des_Moines_Funding_Support.pdf, Exhibit_8_-_Des_Moines_Budget_Details.pdf Please describe the secure or reasonably expected funds identified in the supporting documentation. For funds that are reasonably expected, an explanation of procedural steps with milestone dates for completion which will be taken to secure the funds for the project or program should also be included. WSDOT funding is secured in the Connecting Washington budget LEAP Transportation Document 2015 NL-1, June 28, 2015 (Exhibit 4, Exhibit 5). Local funding commitments have been confirmed at the senior management level and funding commitment letters will be filed with the application. The City of SeaTac will contribute right of way in kind valued at $2 million or more (Exhibit 6). The City of Des Moines has committed $500,000 to the SeaTac Access project (Exhibit 7) from sales and B&O tax revenue (Exhibit 8). The Connecting Washington budget provided full funding for the WSDOT share of the Puget Sound Gateway Program, but the legislature prioritized funding based in part on a commitment by local agencies to raise $130 million toward the total program (SR 509 and SR 167 corridors). To meet the legislature s expected local contribution, agencies with the greatest project benefit have committed their own funds for grant match and need to raise additional funding from grants. All match and grant funding offsets the legislature s local participation target without reducing Connecting Washington funding. Grant funding is intended to contain direct local agency contributions within a feasible level to ensure a successful partnership, one that can gain the approval of each local council/commission. The Gateway local funding partnership includes sixteen cities, two counties and two port districts. As of the date of application, these local agency partners have committed more than $72 million toward match. Project Readiness: PE 1. Are you requesting funds for ONLY a planning study or preliminary engineering? No 2. Is preliminary engineering complete? No 3. What was the date of completion (month and year)? N/A 4. Have preliminary plans been submitted to WSDOT for approval? No 5. Are there any other PE/Design milestones associated with the project? Please identify and provide dates of completion. You may also use this space to explain any dates above. N/A 6. When are preliminary plans expected to be complete? 30% design will be complete by Fall of 2018 and preliminary plans to be completed and approved by WSDOT June Project Readiness: NEPA 1. What is the current or anticipated level of environmental documentation under the National Environmental Policy Act (NEPA) for this project? Environmental Impact statement (EIS) 2. Has the NEPA documentation been approved? Yes 3. Please provide the date of NEPA approval, or the anticipated date of completion (month and year). January 2018 Project Readiness: Right of Way

10 1. Will Right of Way be required for this project? Yes 2. How many parcels do you need? The project requires 77 parcels. WSDOT previously acquired 49 parcels leaving 26 parcels remaining to be acquired. Right of Way acquisition is coordinated with Sound Transit, which needs part of 18 of the remaining parcels. Sound Transit is acquiring those parcels and deeding portions to WSDOT through a land exchange agreement. 3. What is the zoning in the project area? Parcels are zoned CB-C, community business in an urban center, UM, urban medium density residential, UH, urban high density residential. Some parcels already acquired for the project carry no City of SeaTac zoning. 4. Discuss the extent to which your schedule reflects the possibility of condemnation and the actions needed to pursue this. Our project schedule and budget plan for the potential of condemnation and associated potential delay and cost. 5. Does your agency have experience in conducting right of way acquisitions of similar size and complexity? Yes 6. If not, when do you expect a consultant to be selected, under contract, and ready to start (month and year)? N/A 7. In the box below, please identify all relevant right of way milestones, including the current status and estimated completion date of each. Currently preparing appraisals and starting to make offers on parcels. Right of way completion planned for November 2020 Project Readiness: Construction 1. Are funds being requested for construction? Yes 2. Do you have an engineer's estimate? Yes 3. Engineers estimate document Exhibit_9_-_SeaTac_Access_Engineers_Estimate.pdf 4. Identify the environmental permits needed for the project and when they are scheduled to be acquired. WSDOT Obtained: Section 404 Nationwide Permit (NWP) USACE Section 401 WQ Certification or Letter of Verification (LOV) Ecology ESA - USFW Section WDAHP Interchange Justification Report Project HPA Programmatic Statewide HPA Design Builder Obtained: Section 402 NPDES Construction Stormwater General Permit Ecology Noise Permit/Work Hour Variance Local Agency WSDOT Signal Permit(s) ramp meters, interchange ramp terminals Other permits/approvals (potential): o UST removal Ecology o Monument Removal/Setting DNR o Monitoring well Removal/Setting Ecology o Critical Area Review Local Agency o ROW/Street Use Local Agency o Clearing and Grading Local Agency o Trade Permits Local Agency 5. Are Plans, Specifications & Estimates (PS&E) approved? No 6. Please provide the date of approval, or the date when PS&E is scheduled to be submitted for approval (month and year). Design-Build Request for Proposal (RFP) planned advertisement date is November of When is the project scheduled to go to ad (month and year)? 10 of 11

11 Design-Build Request for Proposal planned advertisement date is November of of 11 Other Considerations 1. Describe any additional aspects of your project not requested in the evaluation criteria that could be relevant to the final project recommendation and decisionmaking process. SeaTac Access is part of a local funding partnership between sixteen cities, two counties and two port districts to complete the Puget Sound Gateway Program. The Program closes major continuity gaps in the regional transportation system. These gaps are incomplete highway segments that create regional inefficiencies in traffic flow and freight delivery, inefficiencies that reduce the value of billions in prior investment. We have accepted the cost of those inefficiencies in delay, air quality, safety and economic competitiveness for decades. The requested grant has direct benefit to local cities, counties and Ports and to the entire region. 2. Describe any innovative components included in your project: these could include design elements, cost saving measures, or other innovations. Project uses practical design review to ensure balance between project scope and budget and design-build contracting to control costs and risks. 3. Describe the process that your agency uses to determine the benefits of projects; this could include formal cost-benefit analysis, practical design, or some other process by which the benefits of projects are determined. WSDOT implements a practical design process that focuses on providing maximum benefit to the system, promoting freedom to innovate and develop tailored solutions based on the specific project purpose and need. Through this process WSDOT has developed a project in coordination with stakeholders that provides a phased solution, the SeaTac Access is phase 1 which provides a new segment of roadway and interim half-diamond connection, preceding a future high-speed access controlled connection to the airport. The initial phase provides a much-needed connection to the airport to match near-term traffic forecasts, which is compatible with future expansion to a future high-speed facility. The four-lane SR 509 roadway section (two-lanes NB and two-lanes SB) in the SeaTac Access to the interim half-diamond connection is tailored to provide capacity for anticipated traffic demand, and also minimize the footprint by providing lane width and shoulders that are appropriate for a four-lane facility 4. Final documents N/A

12 SeaTac Access (SR 509 Stage 1) Vicinity Map

13 SeaTac Access (SR 509 Stage 1) Project Map

14 Future Project Extension B Travel Time Paths 1. A-B via SeaTac Access 2. A-B via I-5, S 200th St 3. B-A via SeaTac Access 4. B-A via S 200th St, I-5 Path 1 and 3 SeaTac Access Path 2 and 4 Existing conditions A

15 Puget Sound Gateway Funding as enacted by the 2017 Legislature $20m

16 LEAP Transportation Document 2015 NL-1 as developed June 28, 2015 Connecting Washington Projects Highway Improvements Program (I) (Dollars In Thousands) Rte Project Project Title Leg Dist Total Connecting Washington Account - State 2,000 9,400 19, , ,000 97, ,400 I-90, Spokane Area - Corridor Improvements 0 4,000 22, ,600 18,800 53, L I-90/Barker Road to Harvard Road ,600 18,800 26,400 Connecting Washington Account - State 090 L I-90/Medical Lake & Geiger Interchanges Connecting Washington Account - State ,600 18,800 26, ,000 22, , ,000 22, ,600 I-90, Western Washington - Improvements 7,000 46,000 22, , L I-90/Front Street IJR , ,300 Connecting Washington Account - State 0 2, , L I-90/Eastside Restripe Shoulders 05, 41, 48 7,000 43,700 22, ,200 Connecting Washington Account - State 7,000 43,700 22, ,200 US 101/104/112, Olympic Peninsula/SW WA - Improvements 0 5, , L US 101/Lynch Road Intersection , ,000 Improvements Connecting Washington Account - State 0 5, ,000 SR 167, Tacoma to Puyallup - New Freeway 2,500 57, , , , , , ,000 1,875, M00600R SR 167/SR 509 Puget Sound Gateway 25, 27, 30, 3 2,500 57, , , , , , ,000 1,875,500 Connecting Washington Account - Local ,000 60, ,000 Connecting Washington Account - State 2,500 57, , , , , ,000 20,000 1,565,500 Unspecified - Tolls , ,000 Version: 15NLRBAR Page 6

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19 CITY OF DES MOINES CAPITAL IMPROVEMENT PLAN (Amount in Thousands) Puget Sound Gateway - SR509 Extension 319 Summary Project Description: S 236th Lane CIP Category: Transportation Capital Project Managing Department: Public Works The financial commitment provided by Des Moines will go towards meeting the local contribution mandated by the Washington State Legislature when the Connecting Washington Transportation package was passed, and is intended to fully meet our match contribution, relative to the net benefits of the SR 509 project. Justification/Benefits: The City of Des Moines supports the Puget Sound Gateway Program including the SR 509 Extension project in King County. This new freeway will provide an added corridor in our area, as well as provide congestion relief on the City s arterial roadways. PROJECT SCOPE ANNUAL ALLOCATION Project to Scheduled Plan Plan Plan Plan Plan Plan Expenditures Total Date Year Year Year Year Year Year Year Budget 12/31/ Design - Land & Right of Way - Construction Contingency - Total Expenditures Project to Scheduled Plan Plan Plan Plan Plan Plan Funding Sources Total Date Year Year Year Year Year Year Year Budget 12/31/ One Time Sales & B&O Tax Total Funding OPERATING IMPACT ANNUAL OPERATING IMPACT Operating Impact 6 Year Total Revenue Expenses Net Impact

20 I-5/SR 509 Gateway Phase 1 Summary of Quantities and Cost Estimate WORKING COPY THIS COLUMN IS SOURCE OF ALL UNIT PRICES QUANTITY STD ITEMUNIT ITEM TOTAL Unit Cost PREPARATION 0025 ACRE CLEARING AND GRUBBING $107,000 $5, L.S. REMOVAL OF STRUCTURE AND OBSTRUCTION $920,445 $ GRADING 310 C.Y. ROADWAY EXCAVATION INCL. HAUL $4,443,670 $ , TON GRAVEL BORROW INCL. HAUL $7,389,091 $ , C.Y EMBANKMENT COMPACTION $671,363 $ , STORM SEWER & DRAINAGE L.S. STORM SEWER & DRAINAGE ESTIMATE $2,058,402 $ L.S. 200TH CULVERT $0 $ STRUCTURE S.F. PRESTRESSED CONCRETE GIRDER - SIMPLE SPAN $0 $ S.F PRESTRESSED CONCRETE GIRDER - MULTI SPAN $0 $ S.F PS CONC. GIRDER WIDENING $2,948,400 $ , S.F SPLICED PT GIRDER $4,224,150 $ , EACH SEISMIC RETROFIT $0 $ S.F. THREE SIDED PRECAST CULVERT $17,772,480 $ , S.F. PRESTRESSED SLAB W/ SOLDIER/SECANT PILE WALL ABUTMENTS $0 $ S.F. SOLDIER/SECANT PILE WALL ABUTMENTS $0 $ S.F. POST-TENSIONED CONCRETE BOX GIRDER $0 $ S.F. [reserve for new item] $0 $ S.F. STEEL PLATE GIRDER BRIDGE $0 $ S.F. STEEL BOX GIRDER BRIDGE $0 $ S.F. TEMPORARY ACCESS BRIDGE $0 $ CY GRAVEL BACKFILL FOR SEW, INCL. HAUL $189,098 $ , S.F SEW (MSE WALL) $633,875 $ , S.F. SOLDIER PILE WITH TIE BACK RETAINING WALL $9,648,900 $ , S.F. NOISE WALL $343,200 $ , SURFACING 5100 TON CRUSHED SURFACING BASE COURSE $553,630 $ , ASPHALT TREATED BASE 5334 EST. ANTI-STRIPPING ADDITIVE $29,600 $ CEMENT CONCRETE PAVEMENT 5625 C.Y. CEMENT CONC. PAVEMENT $5,438,250 $ , EACH COROSION RESISTANT DOWEL BAR $687,760 $ , HOT MIX ASPHALT 5767 TON HMA CL. 1/2 IN. PG $2,072,000 $ , CALC JOB MIX COMPLIANCE PRICE ADJUSTMENT $62,160 $ CALC COMPACTION PRICE ADJUSTMENT $41,440 $ EROSION CONTROL AND PLANTING - ACRE WETLAND BUFFER $793,000 $130, ACRE ROADSIDE RESTORATION $3,640,000 $130, TRAFFIC 6763 L.F. SINGLE SLOPE CONCRETE BARRIER $293,760 $ , L.F. PRECAST CONC. BARRIER TYPE 4 $115,819 $ , L.F. CAST IN PLACE CONC. BARRIER TYPE 4 $0 $ L.F. BEAM GUARDRAIL TYPE 31 $122,500 $ , L.F. PLASTIC LINE $79,383 $ , L.F. PLASTIC WIDE LINE $36,105 $ , L.F. PLASTIC STOP LINE $1,204 $ L.S. PERMANENT SIGNING $2,771,940 $ L.S. ILLUMINATION SYSTEM $1,595,000 $ L.S. TRAFFIC SIGNAL SYSTEM $400,000 $250, L.F. CHAIN LINK FENCE TYPE 3 $129,980 $ , L.F. CHAIN LINK FENCE TYPE 4 $4,512 $ EACH PLASTIC HOV LANE SYMBOL $0 $ L.S. TEMPORARY ITS SYSTEM $337,500 $ L.S. PERMANENT ITS SYSTEM $2,250,000 $ EACH RAMP METER $200,000 $100, TRAFFIC MANAGEMENT $0 - TOLL COLLECTION SYSTEMS EST Toll System $0 - OTHER ITEMS L.F. COVERED ROADWAY STAND PIPE (DI Pipe for water main 8 in.) $99,000 $ EST AGREEMENTS (Utilities, etc.) $0 $ EST TRAIL RELOCATION $0 $ TON EXC., HANDLE, HAUL, DISPOSAL OF CONTAM. MAT'L $1,714,256 $ , L.F. SINGLE SLOPE CONCRETE BARRIER RET. WALL $2,476,800 $ , L.F. TEMPORARY BARRIER $609,900 $ , [reserved for new items] $0 - [reserved for new items] $0 - [reserved for new items] $0 - [reserved for new items] $0 - Column Subtotals $77,905,573 $77,905,573 Base Item Total Missing Bid Items (% of Base Item Total) $ 11,685,836 15% Water Pollution Control /TESC (% of Base Item Total) $ 3,116,223 4% Maintenance of Traffic (% of Base Item Total) $ 5,453,390 7% $ 98,161,022 Subtotal 1 MOBILIZATION (% of Subtotal1) $ 9,816, % $ 107,977,125 Subtotal 2 SR509_Estimate_PostCEVP_ _4Sea-TacAcc.xlsx 4/17/2018

21 I-5/SR 509 Gateway Phase 1 Summary of Quantities and Cost Estimate WORKING COPY THIS COLUMN IS SOURCE OF ALL UNIT PRICES DB Engineering and Quality (% of Subtotal 2) $ 11,877, % DB Contract Administration (% of Subtotal 2) $ 5,398, % DB Engineering Mobilization (% DB Engineering and DB Contract Admin) $ 1,727, % Base DB Contract $ 126,981,098 Subtotal 3 Sales Tax (% of Subtotal3) $ 12,698, % Construction Engr and Insp (% of Subtotal3) $ 8,888, % Sound Transit Admin.&Inspection (% of Subtotal3 for EARLY elements) $ - 7.0% Standard Contingency (% of Subtotal3) $ 3,809, % HQ/NW Region DPS (10% of Construction Engineering) $ 888,868 10% $ 26,285,087 Subtotal 4 DB Contract Subtotal (subtotal 3 + subtotal 4, Before Escalation) $ 153,266,186 Risk $ 9,502, % Escalation $ 38,010, % DB Contract Total $ 200,778,703 Stipends $1 M each, assuming two contract package) $ 2,000,000 $4,000,000 Incentives Environmental ($1 M/ each) $ 1,000,000 $2,000,000 Pavement Smoothness ( $6000 / new lane mile * 20 miles) $ 40,000 $120,000 Washington State Patrol $ 125,000 $250,000 WSDOT CN Owner - Toll System PE & CN $ - Utility Engineering (8 % of Utility Agreement and Relocations) $ 516,267 $774,400 Utility Agreement/Relocations $ 6,453,333 $9,680,000 $ 10,134,600 Subtotal - Other Risk + Escalation (Other total) $ 3,141, % Other - Total $ 13,276,326 Lake to Sound Trail $ - $0.0 28th - 24th Ave S (Under construction, budget purpose ) $ - $0.0 Preliminary Engineering (10% of Subtotal 3) $ 12,698, % HQ / NW Region DPS (10% of 1/3 of Preliminary Engineering) PMO TOLL DIVISION DPS (4% Preliminary Engineering ) $ 12,698,110 PE Subtotal Risk + Escalation (PE) $ 1,688, % PE - Total $ 14,386,958 Right of Way $ 34,847,275 Risk + Escalation (RW) $ 9,921, % RW - Total $ 44,768,294 Project Total Preliminary Engineering & Management: $ 14,386,958 $ 14,386,958 Right of Way: $ 44,768,294 $ 44,768,294 Construction (DB contract + Other + L2S Trail + 28th/24th Ave S): $ 214,055,029 $ 214,055,029 TOTAL FUNDING NEED: $ 273,210,282 $ 273,210,282 SR509_Estimate_PostCEVP_ _4Sea-TacAcc.xlsx 4/17/2018