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e -' -< rJJ a ll. a '" ll. rJJ I f- u. a UJ '" -< ll. ~ f- ;:: UJ I f- Z a z a ;:: u ir f- rJJ UJ '" UJ I f- a f- ei rJJ '!l f- UJ UJ I rJJ rJJ I f- Z a o UJ z :;c f- Z a u -< f- -< o u. a UJ '" ::> rJJ g U rJJ o '" a UJ rJJ ::> e SOUTH FLORIDA WATER MANGEMENT DISTRICT GENERAL ENGINEERING SERVICES platforms, and miscellaneous lifting beams and rigs. He has been responsible for the evaluation of crane construction installation; television studio lighting support grid, and evaluation and specification of restorations for a 1923 ele\"ated water tower considered a local historical landmark. He has also been responsible for the design of several steel buildings ranging in size and complexity for a nuclear power plant project. Relevant Experience 01/1998 - Present, Senior Lead Structural Engineer, Shaw Environmental & Infrastructure, Inc. Responsible for the bridges, depressed highway sections, miscellaneous supporting stmctures, and the design of expanded polystyrenc (EPS) block filled structures. Responsibilitics also include project management, providing construction support services for client projects, business de\"elopment and prcparing technical portions of design engineering and constmction support proposals. The following is a summary of key projects: Project Manager & Senior Lead Structural Engineer, 1-90/1-93 Interchange 1-93 Southbound, Central Artery/Tunnel (CA/T) Project, Massachusetts Highway Department, Boston, MA, $16,682,709.25, 11/1993 - Present. As a Task Leader/Senior Lcad Structural Engineer, hc is responsible for the construction phasc scrviccs of 10 miscellaneous bridges, six depressed highway sections (boats), transition structures, and temporary bridges along with a stormwater pumphouse for the I\[assachusetts Highway Department associated \vith Constmction Contracts C09C I, C09C4 and C09C2 of the Central Artery/Tunnel Project. He is also responsible for the design of eight expanded polystyrene (EPS) block filled structures, ranging from 90 fcet to 450 feet long. A zero balance method is used to determine the amount of EPS for each stmcture. The EPS is designed to withstand all vertical loads and lateral loads, including wind and seismic. 1-\S a Task Leader/Senior Lead Structural Engineer, he was responsible for supervising the final design of 12 miscellaneous bridges and transition structures for the Massachusetts Highway Department associated with I SHAW ENVIRONMENTAL, INC. 06C122006T Design Contract D009C of the Central Artery Project. \,rork includes: The design of six multi-span bulb-tee, prestressed, precast concrete stringer bridges ranging from 90 ft to 440 ft long. 1. Developing the structural geometry for those portions of the interchange that transition between surface roachvay and tunnels. These concrete transitions follow the roadway geometry, both horizontally and \"ertically, including superelevations to provide a structure with safety walks, and earth retaining walls. The complexity of these structures range from a single ramp to two mainline ramps and five merging ramps. 2. Design of the Albany Street and Ramp Q interchange bridge \vhich combines a 2-lane city street and a \vide I-lane interchange ramp. The geometry of this 2-span bridge includes 2 diverging, diametrically opposing cllLTed horizontal alignments resulting in a common span to the north and 2 separate spans to the south that form a "Y" in plan. Three designs were developed, a cast-in-place postensioned concrete box girder superstructure, a steel box girder with a dapped end superstructure and a stcel tloor beam superstructure. The tloor beam superstructure was constructed. 3. The design of eight expanded polystyrene (EPS) block filled structures, ranging from 90 foot to 450 foot long. A zero balance method is used to determine the amount of EPS for each structure. The EPS is desif:,rned to \vithstand all \"erticalloads and lateral loads, including wind and seismic. He was responsible for the design of numerous temporary bridges for this project, including the superstructure design of the Interim Viaduct of Albany Street (IV AS). This is a 20-span, approximately 1800-ft- long viaduct with spans that range from 53 ft to 104 ft. [t is a steel girder, concrete filled, steel deck composite design. .Also, was responsible for constmction phase services for this viaduct. Accomplishments: Developed and produced 100% drawings for IV AS in a span of 10 weeks from Notice to Proceed (NTP) that resulted in less than 1% contractor claims against the $12-million construction budget. ERIC W JOHNSTON D