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PRO
FESS
ION
AL
AWA
RDS
2018
APW
APublic Works Project of the Year A w a r d
Nomination Form
Deadline January 17, 2018(electronic submitttals only)
Project Name
Project Completion Date
Public Agency
Project Category Structures
Transportation Environment Historical Restoration/Preservation Disaster or Emergency Construction/Repair
Project Division Less than $5 Million
$5 Million, but less than $25 Million $25 Million–$75 Million More than $75 Million
Managing Agency
Name
Title
Agency/Organization
Address (if post o�ce box, include street address)
City State/Province Zip/Postal Code
Phone Fax
Primary Contractor
Name
Title
Agency/Organization
Address (if post o�ce box, include street address)
City State/Province Zip-Postal Code
Phone Fax
Primary Consultant
Name
Title
Agency/Organization
Address (if post o�ce box, include street address)
City State/Province Zip/Postal Code
Phone Fax
Continued...
Must be substantially completed (90%) and available for public use as of December 31, 20 1 7.
Jake Brockmoller
Connecting 28th/24th Avenue South
August 20, 2017
City of SeaTac
Project Manager
Ceccanti, Inc.
4116 Brookdale Road East
Tacoma WA 98446
253.888.2514
Roger Mason, PE (Previously with CH2M, currently with Parametrix)
Florendo Cabudol, Jr. PE
City Engineer
City of SeaTac
4800 South 188th Street
SeaTac WA 98188
206.973.4740
Senior Project Manager
CH2M
1100 112th Ave NE, Suite 500
Bellevue WA 98004
360.850.5322 (Roger Mason)/425-453-5000 (CH2M)
✔
✔
PRO
FESS
ION
AL
AWA
RDS
2018
APW
APublic Works Project of the Year Award
Supporting Data Form
Please address each of the following areas in your nomination, adhering to the sequence below when possible.
• Completion date contained in contract. Any time extensions granted should be addressed in the submittal.
• Construction schedule, management, and control techniques used. Use of alternative materials, practices of funding that demonstrates a commitment to sustainability.
• Safety performance including number of lost-time injuries per 1,000 man-hours worked and overall safety program employed during the construction phase.
• Environmental considerations including special steps taken to preserve and protect the environment,endangered species, etc., during the construction phase.
• Community relations—a summary of the e�orts by the agency, consultant and contractor to protect publiclives and property, minimize public inconvenience and improve relations.
• Unusual accomplishments under adverse conditions, including but not limited to, adverse weather, soil or site conditions, or other occurrences over which therewas no control.
• Additional considerations you would like to bring to the attention of the project review panel, such as innovations in technology and/or management applications during the project.
NOTE: Supporting documentation is limited to 20 pages, exclusive of photographs and nomination form. Photographs will be used for promotional purposes by the association. Submittal should include nomination form and supporting documentation form, and photographs. No letters of recommendation please. Simultaneous nomination of the same project in two categories is not permitted.
Nominated by: (Can only be nominated by managing public agency or APWA chapters.) Projects that involve or reside within two or more chapters locations can be co-nomiated. Each chapter will receive credit to submit a PACE nomination. All chapters must be identi�ed on the nomination form and before the nominations are judged.
Name
Title
Agency/Organization
Address (if post o�ce box, include street address)
City State/Province Zip/Postal Code
Phone Fax
Florendo Cabudol, Jr. PE
City Engineer
City of SeaTac
4800 South 188th Street
SeaTac WA 98188
206.973.4740 206.973.4809
2017 Entry | APWA Public Works Project of the Year Transportation ($5 Million, but less than $25 Million)
Prepared by:
City of SeaTac | Connecting 28th/24th Avenue South Project
PRO
FESS
ION
AL
AWA
RDS
2018
APW
APublic Works Project of the Year A w a r d
Nomination Form
Deadline January 17, 2018(electronic submitttals only)
Project Name
Project Completion Date
Public Agency
Project Category Structures
Transportation Environment Historical Restoration/Preservation Disaster or Emergency Construction/Repair
Project Division Less than $5 Million
$5 Million, but less than $25 Million $25 Million–$75 Million More than $75 Million
Managing Agency
Name
Title
Agency/Organization
Address (if post o�ce box, include street address)
City State/Province Zip/Postal Code
Phone Fax
Primary Contractor
Name
Title
Agency/Organization
Address (if post o�ce box, include street address)
City State/Province Zip-Postal Code
Phone Fax
Primary Consultant
Name
Title
Agency/Organization
Address (if post o�ce box, include street address)
City State/Province Zip/Postal Code
Phone Fax
Continued...
Must be substantially completed (90%) and available for public use as of December 31, 20 1 7.
Jake Brockmoller
Connecting 28th/24th Avenue South
August 20, 2017
City of SeaTac
Project Manager
Ceccanti, Inc.
4116 Brookdale Road East
Tacoma WA 98446
253.888.2514
Roger Mason, PE (Previously with CH2M, currently with Parametrix)
Florendo Cabudol, Jr. PE
City Engineer
City of SeaTac
4800 South 188th Street
SeaTac WA 98188
206.973.4740
Senior Project Manager
CH2M
1100 112th Ave NE, Suite 500
Bellevue WA 98004
360.850.5322 (Roger Mason)/425-453-5000 (CH2M)
✔
✔
PRO
FESS
ION
AL
AWA
RDS
2018
APW
APublic Works Project of the Year Award
Supporting Data Form
Please address each of the following areas in your nomination, adhering to the sequence below when possible.
• Completion date contained in contract. Any time extensions granted should be addressed in the submittal.
• Construction schedule, management, and control techniques used. Use of alternative materials, practices of funding that demonstrates a commitment to sustainability.
• Safety performance including number of lost-time injuries per 1,000 man-hours worked and overall safety program employed during the construction phase.
• Environmental considerations including special steps taken to preserve and protect the environment,endangered species, etc., during the construction phase.
• Community relations—a summary of the e�orts by the agency, consultant and contractor to protect publiclives and property, minimize public inconvenience and improve relations.
• Unusual accomplishments under adverse conditions, including but not limited to, adverse weather, soil or site conditions, or other occurrences over which therewas no control.
• Additional considerations you would like to bring to the attention of the project review panel, such as innovations in technology and/or management applications during the project.
NOTE: Supporting documentation is limited to 20 pages, exclusive of photographs and nomination form. Photographs will be used for promotional purposes by the association. Submittal should include nomination form and supporting documentation form, and photographs. No letters of recommendation please. Simultaneous nomination of the same project in two categories is not permitted.
Nominated by: (Can only be nominated by managing public agency or APWA chapters.) Projects that involve or reside within two or more chapters locations can be co-nomiated. Each chapter will receive credit to submit a PACE nomination. All chapters must be identi�ed on the nomination form and before the nominations are judged.
Name
Title
Agency/Organization
Address (if post o�ce box, include street address)
City State/Province Zip/Postal Code
Phone Fax
Florendo Cabudol, Jr. PE
City Engineer
City of SeaTac
4800 South 188th Street
SeaTac WA 98188
206.973.4740 206.973.4809
APWA Public Works Project of the Year
Transportation ($5 Million, but less than $25 Million)
- 1 -
Project Overview The City of SeaTac, in cooperation with the City of Des Moines, is proud to submit the Connecting 28th/24th Avenue South project for recognition as 2017 APWA Public Works Project of the Year. This project completes a principal arterial corridor for 28th/24th Avenue South from South 188th Street to South 216th Street and includes improvements and infrastructure that is forward compatible with WSDOT’s proposed SR 509 corridor improvements. It constructs a new five lane road through an undeveloped portion of the corridor and links the existing 28th Avenue South to the existing 24th Avenue South. Improvements include bicycle lanes, curb, gutter, sidewalk/shared use path, surface water infrastructure, street lighting, channelization, landscaping, and undergrounding of arterial utilities. The completion of this project not only accomplishes significant regional transportation goals, but also greatly improves pedestrian and vehicular safety, encourages economic development, enhances the environment, and promotes transit use. Completing the corridor involved three construction phases as shown in Exhibit 1. Phase 1 was a one-mile long segment constructed by the City of SeaTac in 2002; Phase 2 was a half-mile long segment constructed by the City of Des Moines from their northern City limits at South 208th Street to South 216th. In 2017, Phase 3 closed the gap and constructed the new roadway across the vacant and undeveloped area between Phases 1 and 2. Phase 3 is forward compatible with WSDOT’s future SR 509 interchange improvements.
"Good airport access is essential to providing efficient and cost effective freight mobility for track dependent air cargo business. The City of SeaTac’s Connecting 28th/24th Project will assist air cargo freight mobility at the sound end of the airport by providing an alternative to the often congested State Route 99/International Boulevard.” Mark Reis, Managing Director, Seattle-Tacoma International Airport
Exhibit 1. Project-overview showing all phases of the project to complete the corridor
APWA Public Works Project of the Year
Transportation ($5 Million, but less than $25 Million)
- 2 -
Background and Context The Connecting 28th/24th Avenue South Project is the largest capital improvement project that the City of SeaTac has ever undertaken. It’s located in SeaTac, King County, Washington. The project extends 26th Avenue South from approximately South 202nd Street south to South 208th Street (about 2,640 feet/0.5 mile), joining at the existing terminus of 24th Avenue South. The project completes a new principal arterial corridor connecting 28th Avenue South in SeaTac to 24th Avenue South in Des Moines. The Project facilitates access for industrial users, promotes economic development for properties adjacent to the new corridor, and connects residents of the surrounding neighborhoods in the cities of SeaTac and Des Moines to Sea-Tac International Airport, the Angle Lake Light Rail Station, Metro transit services and future development. Some of the benefits that the project will help create and promote are:
• Provides multi-modal access and connectivity to the Angle Lake Light Rail Station
• Moves more than 4 million annual tons of freight
• Creates access to approximately 200 acres of developable land
• Enhances regional economic development where over 20 years: o creation of up to 24,000 new jobs (12,667 family wage jobs)
o 1,345,000 square feet of logistics/warehouse/industrial
o 4,380,000 square feet of office and retail
o 1,600 residential units and several hotels
Complete Street. The 28th/24th Avenue South corridor is a Complete Street accommodating multiple modes including non-motorized use by residents, commuters and area businesses. A buffered 12 foot shared-use path for pedestrians/bikes on both sides of roadway provides safe and efficient connections to transit facilities including the future Angle Lake Light Rail Station and the RapidRide corridor on SR 99 (1/4 mile), and provides alternatives to SOV trips. The project also promotes better job- to- housing balance by providing opportunities for people to live close to their workplace.
“Improvements to this corridor are part of the Master Plan of the I-5/SR 509 Corridor Completion and Freight Improvement Project. This project is the missing link in the local roadway network and provides an additional alternative access to Seat-Tac International Airport, in turn helping to achieve the goals and objectives to the SR 509 Extension project.” Stacy Trussler, Director, WSDOT Urban Planning Office
APWA Public Works Project of the Year
Transportation ($5 Million, but less than $25 Million)
- 3 -
Response to Application Questions
1. Contract Completion Date April 26, 2016 – Council Approval for Construction Award May 16, 2016 – Award June 6, 2016 – Notice to Proceed
Contract completion scheduled for 310 working days from NTP – August 31, 2017 Project substantially complete August 20, 2017 with five executed contract Change Orders Open to Traffic – August 21, 2017
Schedule
The project was advertised on March 9, 2016 with Notice to Proceed (NTP) issued June 6, 2016. Construction activities began in June 2016 with substantial completion granted on August 20, 2017. The original contract required work to be completed within 310 working days.
2. Construction schedule, management, and control techniques used. Use of alternative materials, practices of funding that demonstrates a commitment to sustainability.
“When the SR509 Completion Project received funding in 2015, the City of SeaTac was finalizing plans for constructing the Connecting 28th/24th Avenue South arterial improvement project. To minimize impacts…the City of SeaTac quickly partnered with WSDOT to incorporate a bridge for the future SR509 and a tunnel for a future South Airport Access Expressway into their Connecting 28th/24th Avenue South project. This involved close coordination and development of an accelerated bridge and tunnel design…if the bridge and tunnel were not built in the arterial improvement project, then a 45 foot high embankment would have been constructed across the SR509 alignment…close coordination avoided significant costs and impacts…” Omar Jepperson, PE, SR 509 Project Manager, WSDOT
Visualization of proposed approach fills with Tunnel and SR 509 Bridge under 28th/24th Ave South
APWA Public Works Project of the Year
Transportation ($5 Million, but less than $25 Million)
- 4 -
Construction Management Processes and Techniques The project team employed many management control techniques throughout the delivery of this complex project, however the most significant and noteworthy was the approach used to address the project’s most significant and challenging risk – importing 300,000 cubic yards of fill material.
Following is a description of the processes and techniques the City, their partners, and contractors employed to develop innovative solutions and successfully overcome these challenges.
Early Earthwork/Soil Delivery Contract. Midway through the design phase of the project, the City initiated a Constructability/Value Engineering
workshop to evaluate the challenges and opportunities related to importing 300,000 cubic yards of material needed to construct the nearly 50-foot high roadway approach fills over the future SR 509 corridor. A key outcome of the workshop was a recommendation for an early earthwork contract to stockpile as much material as possible and have it in place for the subsequent roadway construction contract. The City recognized the potential for significant benefits, including cost and schedule savings for the project and moved forward.
Approach
Hauling 300,000 cubic yards of imported material through the City of SeaTac on heavily congested corridors (SR 99 (International Boulevard) and I-5) would be very disruptive to the travelling public as well as an environmental concern (dust, emissions, fuel consumption). In addition, the cost to truck the material in was extremely high (haul distances were at a minimum 30 miles one way).
From the beginning of the project, the team sought an innovative solution to this challenge. During the first year of design, the team looked for opportunities to obtain the necessary fill material on properties near or adjacent to the project. The search included discussions with neighboring Cities, the Port of Seattle, and private developers
looking to develop adjacent to the project. In early 2014, working closely with the City, the Port of Seattle, and Merlino Construction, a large quantity of material was identified near the project. The material was the result of a large grading operation as part of a contract between the Port of Seattle and Merlino Construction.
Once the opportunity was identified, the design team swung into action. Over a six week period the team prepared the design of an early earthwork construction package; obtained the necessary temporary construction easements from the Port of Seattle on land needed to stockpile the material; prepared grading, drainage and erosion control plans and specifications; prepared a robust material testing program; obtained necessary environmental permits and clearances; and negotiated a soil
delivery contract.
Soil placement and stockpile and compaction underway
Compacted stockpile with slope protection and erosion control
Imported glacial till being placed, compacted in stockpiles
APWA Public Works Project of the Year
Transportation ($5 Million, but less than $25 Million)
- 5 -
Grading plans were developed using InRoads Site Designer, which made modeling “what-if” scenarios simple as the team determined the optimum side slopes and stockpile shapes to fit in the most material possible while avoiding all existing utilities and easements. In addition to maximizing the available space to place material, one key goal was to place as much material as possible within the future roadway prism to minimize rework of the stockpiles during the actual roadway construction – a separate contract that was advertised and awarded later.
Between April and September of 2014, Merlino Construction delivered 218,000 cubic yards of material from the excavation site less than 1 mile from the embankment site, to the 28th/24th Avenue South project site. Trucks travelled along a more direct and lightly travelled route, avoiding the heavy congestion on SR 99 and I-5. City and consultant staff monitored placement of material, directed the material testing program and prepared written field reports summarizing each day's activities. Material testing was extremely
important as the future roadway and embankment would be within the future SR 509 interchange area. The City had already been discussing the possible inclusion of a bridge necessary to cross over the future SR 509 corridor. The well documented material testing program was key to addressing any concerns WSDOT may have about the quality of material placed within the bridge footing area.
Quantity of material placed was monitored using 3D scanning technology. The 3D scans also made as-builting of the stockpiles quick and efficient. The surveyed stockpiles could then be easily added into the project basemap for design of the remainder of the project.
The City acquired the excavated material for $1.50 per cubic yard, which included delivery to the site and the necessary compaction so the material could be stored until the roadway project was constructed. Since the material being excavated was close to the location of the Connecting 28th/24th Avenue South project, the City was able to purchase the material at a significant cost savings. This significant cost savings (approximately $2.7 million) created a special market condition, and SMC 3.31.120 (B)(2) and RCW 39.04.280 (1)(B) allowed the City to waive the competitive bidding requirements in this situation. Additionally, acquiring the fill material “now” reduced the project construction time, therefore saving additional costs during construction.
Costs for the material, in place and compacted, was less than a third of the original long haul estimate. Those savings allowed the City to pursue the inclusion of the SR 509 bridge and tunnel that was not originally in the scope of the Connecting 28th/24th Avenue South project – due in part to the uncertainty of the funding status of SR 509. By leveraging the savings, the City was able to secure complete funding for the SR 509 bridge undercrossing and South Access Tunnel as part of the 28th/24th project. Construction of the bridge and tunnel now, saved the City and State upwards of $2.5 million and avoided future construction impacts including partial tear-out of the new roadway.
Looking west at approach fill/stockpile - top is proposed roadway grade for 28th/24th
APWA Public Works Project of the Year
Transportation ($5 Million, but less than $25 Million)
- 6 -
The completion of the early earthwork/soil delivery phase of the project was a key milestone in the project and made it possible for the City to construct the first element of what will be WSDOT's nearly $900 million SR 509 Program.
Early Earthwork Highlights
The City was successful in achieving many sustainable benefits from the early soil delivery/stockpiling contract. Specifically, it allowed for:
• Re-use of nearby disposal material • Reduced and/or eliminated truck traffic and haul route impacts to the local
transportation network; • Saved approximately $2.7 million by having the material delivered, compacted
and completed in 2015 in advance of the roadway construction contract.
Practical Design and WSDOT Coordination: The original cross-section and configuration of SR 509 at the undercrossing of 28th/24th Avenue South was a 4 lane with full-width shoulders cross-section that included the main line and South Access ramps. It required a complex multi-span bridge/undercrossing structure. The City worked closely with WSDOT to employ Practical Design techniques to significantly reduce the cross-section and simplify the structures for SR 509. The result was a narrowed roadway cross-section that only required a single span bridge and a separate tunnel constructed from pre-cast pipe arches. This significantly reduced the cost of the bridge and tunnel and allowed it to be incorporated into the project and ultimately constructed as a part of the project.
The new roadway includes bridge and tunnel structures that accommodate the future SR 509 corridor. Extensive coordination and cooperation with WSDOT helped incorporate these elements to preserve the new roadway and keep it forward compatible with SR 509. Constructing the bridge and tunnel structures as part of this project also helped to save approximately $3 million in future SR 509 construction costs.
Pre-cast Arches to accelerate tunnel construction: The cost of constructing a bridge that could span both the SR 509 mainline and the South Access was considerable. Through close coordination with WSDOT and the City, an alternative was developed that lowered cost. CH2M engineers developed a ‘tunnel’ design utilizing a large diameter precast concrete culvert section. Known as a ‘Bebo section, the culvert reduced the span of the bridge over SR 509 to 140 feet - significantly less than the 200-foot long span. The culvert also saved time with rapid construction possible due to the precast segmental nature of the culvert.
Pillow Wall at Tunnel: To keep the project schedule moving forward, the Contractor, City, and WSDOT collaborated to develop a temporary shoring system using a geotextile ‘pillow’ wall that allowed the contractor to construct the south bridge abutment while maintaining necessary construction clearances to allow for the construction of the tunnel concurrent with the construction of the bridge abutment. This low-cost shoring alternative saved approximately three months in the construction schedule.
Pillow Wall shoring around abutment/Pier 1
APWA Public Works Project of the Year
Transportation ($5 Million, but less than $25 Million)
- 7 -
Construction of large diameter pipe HDPE under 40 feet of fill: A significant storm drain line crossed through the site conveying stormwater from a large basin east of the project site including runoff from I-5. To keep this storm drain system operational during construction it was necessary to construct the storm drain pipe as an early phase of construction. Design engineers proposed a large diameter (54”) continuously welded pipe which provided the necessary strength and leak protection to be placed under 45 feet of compacted fill. To accelerate installation the Contractor proposed bedding and anchoring the HDPE pipe in CDF. The pipe joints were field welded adjacent to the trench then the entire length of pipe was lowered into the trench.
Competitive Bids. Having the majority of the roadway embankment stockpiled on site eliminated a significant cost and schedule risk for bidders of the subsequent 24th/28th Avenue South project. The city benefited from a very competitive bid environment and process. Five bids were received by highly qualified contractors and opened on April 1, 2016, resulting in a low bid that was 13% below the Engineer’s Estimate.
Contractor Bid
Ceccanti, Inc. $12,298,620.33
Scarsella Bros., Inc. $12,674,265.12
Johansen Excavating, Inc. $13,657,904.73
Gary Merlino Construction Co., Inc. $15,252,358.68
MidMountain Contractors $15,341,544.96
Engineer’s Estimate $14,108,628.79
Commitment to Sustainability
The project incorporates many sustainability features consistent with the City’s commitment to sustainability.
Modal Measures: Project completes gap in bicycle lane or path.
Energy Measures: Replace or install Low Energy Lighting
Environmental Measures: Incorporates hardscaping or climate appropriate plantings. Use of drought tolerant landscape plantings and low maintenance ground cover for fill slopes. Pervious paving/pavers will be incorporated into mixed-use path and at planter strip locations. Incorporates Low Impact Drainage practices. Project reduces overall impervious surface by approximately 1.5 acres. Removes existing roadways and driveways; restoring them with infiltrating soils and native vegetation to eliminate stormwater runoff to DesMoines Creek from these areas and creates habitat more beneficial to wildlife.
Ceccanti crews lift 400 lf of 54 inch HDPE storm pipe and place in trench
APWA Public Works Project of the Year
Transportation ($5 Million, but less than $25 Million)
- 8 -
Recycling Measures: Project re-used/recycled over 200,000 cubic yards of soil material being disposed by a nearby construction contractor which reduced environmental impacts and disruption.
Other Measures: Project provides a 12-foot shared-use path for bikes and pedestrians on both sides of the proposed roadway providing a non-motorized connection to Transit (Angle Lake Light Rail Station and RapidRide), employment centers and housing.
3. Safety performance and overall safety program employed during construction
Safety Features during Construction. A continuous commitment to job site safety was an important value to every member of the team. The project had several potentially hazardous working conditions including working with a deep trench to install an 18-inch sanitary sewer main and a 54-inch HDPE storm drainage pipe, mass earthwork grading and embankment, tall retaining walls, bridge erection, and tunnel construction, and yet was completed with no lost time of work related to jobsite injuries.
The Contractor and the Construction Management (CM) Team prepared Health and Safety Plans. The Contractor (Ceccanti) acted as
the Safety Coordinator for the project and was responsible for implementing the written Safety Plan and verifying that all construction staff complied with the plan requirements that included the following: • Verify CM Team site personnel and subcontractor personnel read the comply with
the Safety Plan • Verify that team members have completed required training prior to field work • Conduct a Health and Safety orientation for all team members • Verify appropriate Personal Protective Equipment availability and use • Verify that project health and safety forms and permits are being used • Conduct incident investigations and report incidents • Provide safety/incident reports at weekly construction meetings • Maintain safety records and documentation for the project file • Develop communication plan for emergency services and first responders • Serve as the competent person for geotechnical drilling; earthmoving equipment
operation; excavation; work at height when fall protection, fall restraint or other protective systems are used; ladder use.
Fall Safety protection implemented for retaining wall construction
APWA Public Works Project of the Year
Transportation ($5 Million, but less than $25 Million)
- 9 -
4. Environmental considerations including special steps taken to preserve and protect the environment during the construction phase.
Special attention to environmental awareness was made throughout construction. Compliance with Washington Department of Ecology was discussed at every weekly meeting with the City of SeaTac, the Contractor, and other agencies including utility companies. The City collected monthly construction storm water discharge reports from the Contractor and these reports were stored on site and made available to the Department of Ecology inspector when requested. Concrete work was diligently monitored throughout the project to prevent it from entering the storm drainage system and/or Des Moines Creek.
Stormwater Control and Protection of Des Moines Creek. As part of the early earthworks contract, three temporary ponds were constructed to detain runoff from the stockpiled materials prior to entering the existing 204th Street pond and ultimately Des Moines Creek. Those same ponds were then used during the roadway construction to again detain construction stormwater prior to entering the 204th Street pond and Des Moines Creek. Throughout construction discharges were monitored to ensure that water quality was maintained, protecting Des Moines Creek. The City, Contractor, and regulatory agencies worked in close coordination to monitor construction storm water management throughout the course of construction. This cooperation by all involved resulted in zero non-compliant discharges to Des Moines Creek. Considering the volume of embankment material and disturbed area (13.5 acres), this was a significant positive environmental milestone for the project.
5. Community relations as evidenced by efforts by agency, consultant, and contractor to protect public lives and property, minimize public inconvenience and improve relations.
The City engaged in multiple outreach efforts to understand the impact on the adjacent property owners and to develop mitigation plans. Mitigation work included septic decommissioning, sanitary sewer connections, driveway restoration, undergrounding of overhead utilities, pedestrian lighting and sidewalks/shared use trail.
The City also worked with major employers and stakeholders along the project to understand their business and security needs during construction. Coordination with Federal Detention Center, Alaska Airlines, SeaTac Park and Fly, and Sound Transit was crucial in ensuring that their day-to-day operations were minimally impacted.
APWA Public Works Project of the Year
Transportation ($5 Million, but less than $25 Million)
- 10 -
Several methods used to communicate with residents, owners, and the travelling public included:
• Weekly Construction Meeting - invitee list was broadened to stakeholders that conduct business along the project corridor
• Electronic reader boards at key intersections • Email newsletters and email updates with project phase updates and detour
route modifications during construction • Created dedicated City webpage that were updated and maintained throughout
the construction period. • Met in person with multiple stakeholders from design throughout construction
to explain the project benefits and modify construction schedule/access to lessen impacts, educate and share resources.
• Held open house meetings
Managed Public Expectations and Communication. Lane and road closures impacting traffic circulation and access to local residences and businesses in the project area involved a continuous outreach plan with impacted parties to communicate and mitigate traffic and access impacts and soothe concerns. This was a priority for our Resident Engineer. The CM team anticipated and addressed these community concerns, and was proactive and responsive to the needs of the residents and travelling public. This approach included a project website, preparing project update flyers, and proactively meeting with citizens door-to-door to discuss concerns.
Right-of-Way (ROW) Acquisition and Overcoming Economic Hardships. The project required two full acquisitions from the Port of Seattle and several partial acquisitions from other property owners for needed ROW. No relocation of residents was needed. The City made all reasonable efforts to minimize the impacts to property owners due to the ROW acquisition and construction. The timing of these acquisitions occurred from 2014 to 2016. All acquisitions were completed successfully and without condemnation.
Celebrating Successes and Achievements. The City celebrated successes and accomplishments throughout the design and construction phases of the project. Formal events were organized including a Groundbreaking Ceremony to celebrate the beginning of construction; and a Ribbon Cutting Ceremony to celebrate the opening of the new underpass. These ceremonies were hosted by the City to express their appreciation to the community and neighbors, funding partners, political leadership and others involved for their support and achievements.
APWA Public Works Project of the Year
Transportation ($5 Million, but less than $25 Million)
- 11 -
Community gathers to hear officials express their appreciation and accomplishments at the Ribbon Cutting Ceremony in August 2017
City officials and funding partners gather for the Groundbreaking Ceremony on June 15, 2016 and formally begin construction.
APWA Public Works Project of the Year
Transportation ($5 Million, but less than $25 Million)
- 12 -
6. Unusual accomplishments under adverse conditions including, but not limited to adverse weather, soil or other site conditions, or other occurrences over which there is no control.
Unusual accomplishments under adverse conditions Sound Transit became an early partner in the project and committed $3.5 million of funding for traffic mitigation related to their proposed Angle Lake Light Rail Station located nearby at South 200th Street. The funding came with a commitment by the City to have 28th/24th construction complete within a year from opening of the Angle Lake Station in late 2016.
Meanwhile, the City commenced the design and continued developing funding partnerships with other agencies including FMSIB, POS, and finally TIB who awarded the City $6.8 million in November 2013 to close the funding gap and enable the City to begin construction – and keep their funding commitment/deadline with Sound Transit.
This segment of 28th/24th Avenue South intersects and crosses over the future SR 509 corridor – a proposed WSDOT project stalled for years due to lack of funding. At that time (2014) funding for SR 509 was still an unknown and regarded as being in the distant future. The City chose to move forward with the design of 28th/24th Avenue South and construct a project that was forward compatible with the future SR 509 but without the SR 509 bridge/undercrossing – rather a 50-foot tall embankment that would be excavated and removed later if/when SR 509 was funded and constructed.
The design progressed based on that assumption until, much to everyone’s surprise and pleasure, the 2015 legislature proposed the Connecting Washington legislation that funded SR 509. This created an
opportunity to incorporate the SR 509 undercrossing into the City’s project and avoid the tear out and disruption that would occur after
28th/24th Avenue South was completed and open to traffic.
With this new information, the City of SeaTac and WSDOT worked closely to develop an approach and funding strategy to incorporate the SR 509 Underpass Bridge and South Access Ramp Tunnel into the City’s upcoming construction project. This involved developing alternatives, cost estimates, fact sheets and information for elected officials, WSDOT and FHWA to communicate the benefits of building the bridge now, and not later as a part of SR 509. A Practical Design approach was used to optimize the SR 509 undercrossing bridge and tunnel, incorporating them into the City’s project for early construction. Ultimately the proposal received unanimous support from all stakeholders, including the legislature, and up to $6.3 million of state funding was
Fact sheet used to convey the opportunities and benefits of funding the SR 509 bridge as part of the 28th/24th Avenue South project
APWA Public Works Project of the Year
Transportation ($5 Million, but less than $25 Million)
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provided as part of the Connecting Washington and Puget Sound Gateway (SR 509) program to incorporate these improvements into the construction of the project.
The City and WSDOT proceeded with a joint effort to fast-track the SR 509 Bridge and Tunnel design and approval in 6 months. The City, WSDOT and CH2M delivered an accelerated bridge and tunnel design and incorporated them into the roadway construction package and awarded a construction contract to Ceccanti, Inc in May 2016. This approach resulted in more than $5 million of savings; it initiated construction of SR 509 improvements, and the City maintained their funding and schedule commitment to Sound Transit
7. Additional considerations you would like to bring to the attention of the project review panel, such as innovations in technology and/or management applications during the project.
Agency Coordination The City of SeaTac’s Connecting 28th/24th Project and City of Des Moines’ Transportation Gateway Project were implemented consistent with a partnership to develop a 5 lane multi-modal arterial corridor parallel to SR 99 and I-5 that supports a new south access to SeaTac International Airport, the Angle Lake Station as well as the surrounding PSRC regional urban growth center. The roadway infrastructure provided the capacity and linkages that attracted rapid development of the Des Moines Creek Business Park attracting major businesses, including the FAA offices opening on January 26, 2018 supporting 1,600 jobs. Over the next 20 years, these investments by Des Moines and SeaTac in this regional urban growth center is projected to:
• Support creation of 15,500 jobs • Support creation of 4.4 million square feet of development • Provide a Total Direct Economic Impact of $32.6 million
The following arterial segments of the City of Des Moines Transportation Gateway Project were recently completed in coordination with the Connecting 28th/24th Project to complete this parallel access alternative to SR 99:
• 24th Ave S. Improvements (S. 208th St to S. 216th St) received final acceptance by the City of Des Moines on 12/2/16. • S. 216th St Segment 1-A Improvements (SR99 S. to 24th Ave S.) achieved physical completion on 9/22/17.
"Some small cities in Washington have been aggressively pursuing grants to complete critical freight mobility projects in their communities. The cities of SeaTac and Des Moines join a small but mighty cadre of brave communities who know how to get freight moving. This project represents the first constructed element of the billion dollar Puget Sound Gateway program that will serve Washington’s two largest ports and their distribution networks.” Brian J. Ziegler, PE, Director, Freight Mobility Strategic Investment Board (FMSIB)
City of Des Moines S 216th Street Segment 1-Afacing west from SR99 with new FAA offices on formerly vacant Des Moines Creek Business Park site.
APWA Public Works Project of the Year
Transportation ($5 Million, but less than $25 Million)
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Funding Partnerships
The $24 million Connecting 28th/24th Avenue Sound project was the largest CIP project undertaken by the City of SeaTac, and was several years in the making. A project of this magnitude for a local agency requires strong leadership, partnerships and courage to achieve success. The City commenced the project development in 2012 with the preparation of a Pre-Design Study that evaluated alternatives, developed a preferred alternative (Underpass), budget level cost estimate, and a funding and implementation strategy. Using the results of the Study the City embarked on a funding and implementation strategy that involved partnership development with local, regional, state, and federal agencies.
The project qualified for the $2.5 million grant it received from the Freight Mobility Strategic Investment Board (FMSIB) in 2011. In addition, Sound Transit contributed $3.4 million to the project as mitigation for the development of the Angle Lake Light Rail Station. Additionally, the Port of Seattle and the City agreed to allocate $4 million of shared parking tax revenue to this project that mutually benefited both parties. The City also budgeted $5.5 million for the project.
With these partnerships in place, the City had secured $15.4 million of the $24 million needed to complete the project. In 2012 the City chose to advance the project design, environmental, and right-of-way acquisition work knowing there was a funding shortfall to address before the project could become reality.
"TIB is proud to be a partner in the completion of….SeaTac’s 28th/24th Ave South project…we applaud SeaTac’s success in constructing a tunnel for the SR 509 Gateway alignment so there will be no disruption in service during the construction of SR 509…. The corridor also completes improvements to the new Sound Transit Angle Lake Station. Transitioning from SeaTac to Des Moines, this corridor provides access to one of the last areas of developable land near SeaTac Airport and provides direct freight access to the Kent Valley.” Ashley Probart, Executive Director, Transportation Improvement Board
APWA Public Works Project of the Year
Transportation ($5 Million, but less than $25 Million)
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In November 2013 the City was successful in receiving the $6.8 million requested from TIB – and in March 2016 the City advertised the project for Construction. The City and its partners celebrated the on-time and on-budget completion of the project in a formal ribbon cutting ceremony in August 2017.
Funding Sources Phases
Total in Millions*
Freight Mobility Strategic Investment Board (FMSIB)
Construction $2,500,000
Transportation Improvement Board (TIB)
Right of Way, Construction, Construction Engineering $5,900,000
Sound Transit (Construction) Construction $3,400,000 Washington State Department of Transportation
Design, Construction
$4,900,000 Port of Seattle Right of Way $4,000,000 Franchise Utility Work Reimbursement
Construction $581,000
City of SeaTac Design, Construction Engineering) $3,500,000 Total (Construction Phase Only) $14,900,000
Total Project Cost $24,800,000
*Numbers were rounded
