Cleveland
McMillan Jacobs Associates/Wade Trim (Joint Venture)Client: Northeast Ohio Regional Sewer District
A major component of a program seeks to reduce the Cleveland area’s combined sewer overflow (CSO) discharges by nearly 4 billion gallons a year. The new tunnel and associated infrastructure system will control overflows, flooding, and pollution at 11 permitted CSO locations along Doan Brook, a major tributary to Lake Erie, and reduce CSO volumes by 350 million gallons each year. The system consists of 3.7 miles of tunnel through rock, ranging from 8.5 feet to 18 feet in diameter, routed through a major medical and cultural hub just east of downtown Cleveland. The project also includes five drop shafts, near-surface structures with consolidation sewers, and an emergency overflow basin.
Sammamish, Washington
HW LochnerClient: City of Sammamish
Innovative public engagement strategies helped achieve consensus to replace existing traffic signals with three roundabouts. Along with improving safety and access to the Seattle metro area, the one-mile arterial street improvement eliminated a blocked fish passage, opened a wildlife migration route, preserved established trees, and restored a key wetland. Sustainability priorities were achieved by eliminating 5,000 truckloads of fill material from city streets, replacing an area of engineered fill with a bridge, and reducing area impervious surfaces for more than 27,000 square feet to improve surface water runoff quality.
Fife, Washington
Jacobs
Client: Washington State Department of Transportation
Using an innovative concurrent design-build project delivery method, the project team designed a replacement structure for the 70th Avenue East Bridge over Interstate 5 and a new roundabout intersection with SR99. The project included an innovative roadway alignment that allowed for a single-span bridge with no median pier, eliminating the need for a median work zone and any temporary and permanent widening of I-5 to accommodate the new structure. The design also reduced permanent wetland impacts for more than two acres. The new bridge carries four lanes of traffic and completes a new link for the multiuse InterUrban Trail.
New York
AECOMClient: MTA-Long Island Rail Road
In the first major upgrade in 50 years to the iconic train station, the project team incorporated a more spacious east concourse and wayfinding upgrades, in addition to a new glass canopy entrance that provides direct access to the LIRR concourse. The 50-foot-high canopy incorporates pretensioned steel cables with a smooth, curved, glass enclosure. The innovative use of high-performance glass allows natural light to penetrate the concourses, increasing the station’s energy efficiency. The canopy is also furnished with an air curtain that promotes faster pedestrian traffic flow in and out of the station while maintaining overall efficient climate control.
Kalispell, Montana
KLJClient: City of Kalispell
An obsolete gravel pit overlapping a Superfund site has been transformed into a new economic-generating industrial rail park. As part of the $40 million project, the team relocated rail-served operations to the park from downtown, replaced the old rail line with a 1.6-mile linear park and trail, and created a new “complete street” and signaled intersection on U.S. Route 2. The project also includes new stormwater, lighting, and other infrastructure systems. By mitigating environmental impacts and reorganizing rail service, the project has already spurred an estimated $200 million worth of new housing, commercial, and lifestyle amenities across Kalispell’s core area.
Mukilteo, Washington
KPFFClient: WSDOT, Washington State Ferries Division
The new terminal improves safety for motorists, creates seamless connections with other transportation modes, and provides pedestrians with direct access to the ferry’s passenger deck. Inspired by traditional Native American longhouse architecture, the new facility also features movable passenger and vehicle loading bridges, berthing structures, a vehicle holding area, a six-bay transit center, a waterfront promenade, a public fishing pier, a city street, and an extension of State Route 525. By relocating ferry operations to a new terminal away from Mukilteo’s town center, the project team was able to utilize an innovative seismic system of concrete-filled steel tubes, developed at the University of Washington, which provides safeguards in the event of an earthquake, while building and site elevations accommodate projected rises in sea level.
Tulsa, Oklahoma
GarverClient: Oklahoma Department of Transportation
Engineering innovation was needed for a rare task to design a special project for Tulsa in the healing process of the 1921 Tulsa Race Massacre, which resulted in at least 176 deaths. To mark the 100-year anniversary of the massacre, the project team incorporated special structural elements, including a unique 22-foot soil nail wall adjacent to a major highway to combat landslides and a 20-foot-wide corridor with other retaining walls. Visitors can travel the pedestrian Pathway to Hope and view historic and artistic contributions before connecting with the John Hope Franklin Reconciliation Park.
Brodhead, Wisconsin
MSA Professional ServicesClient: City of Brodhead
Water quality trading (WQT) offers municipalities the ability to generate “credits” to meet U.S. EPA effluent standards and improve stream health. To help Brodhead reduce the amount of phosphorus entering the greater Sugar River watershed and Decatur Lake, the project team developed a strategy that included stabilizing more than 60 actively eroding streambanks along Searles Creek and working with local farmers to make sustainable changes to their manure management practices. Over time, these upgrades are expected to offset approximately 1,090 pounds of total phosphorus per year—substantially more than the 190 pounds that would have been achieved annually with a costly $4.2 million wastewater facility upgrade.
Livengood, Alaska
Shannon & WilsonClient: Alyeska Pipeline Service Company
The Lost Creek site is located on a steep slope with complex soil and thermal conditions caused by degrading permafrost. This resulted in continuous slope movement and posed the threat of a landslide that could disrupt the Trans-Alaska Pipeline System. The project team utilized emerging 3D thermal modeling and testing technologies to replace the pipeline’s vertical support structures. They also stabilized the slope using passive permafrost cooling and surface insulation. The solution promotes environmental sustainability by reducing waste and nearly eliminating wetland impacts, and is a good example for future stability mitigation of slopes at risk from permafrost degradation.
Kahalu’u, North Kona, Hawaii
Bowers + Kubota ConsultingClient: Kamehameha Schools
To make way for a new Hawaiian cultural educational program, the project removed a seven-story, 309-room hotel built in and over tide pools, close to wetlands and coral reefs, and on a parcel with 15 significant historic properties, including the remains of five ancient heiau—a traditional place of worship. To avoid disturbing the tide pools and nearby cultural sites, the hotel was removed in a controlled manner with the use of remote-controlled demolition robots and a high-reach excavator fitted with a concrete processor. Pollution-control devices such as silt curtains as well as archaeological, water quality, and wildlife monitors ensured that natural, historical, and cultural resources were protected throughout the construction.