Page 10: of Marine Technology Magazine (July 2012)

The Case The Case Tetra Tech/Marine Map- ping Group has the proven capability to design, inte-grate, conduct, and docu-ment complex hydrographic, geophysical, and oceano-graphic surveys, using myr- iad technologies and sensors optimized for the task, with precision navigation and po- sitioning in any environment (depths from 1 to 5,000m). The Company The Company Tetra Tech is a provider of consulting, engineering, program management, construction, and technical services; a diverse company, including individuals with expertise in science, research, engineering, construction, and informa-tion technology. Its strength is in collectively providing in- tegrated services?delivering the best solutions to meet our clients? needs. The company supports government and com- mercial clients by providing innovative solutions to complex problems focused on water, environment, energy, infrastruc- ture, and natural resources. With more than 13,000 employees worldwide, Tetra Tech?s capabilities span the entire project life cycle. Our Hydrographic and Geophysical survey services include complete system integration, real-time data process- ing and analysis, and display of geospatial data. Applications for our surveys include dredging, marine facilities design,  sh habitat analysis, cultural resource/debris mapping, sediment investigations, geologic fault mapping, and other marine-re- lated activities. Our work spans marine, estuarine, riverine, and wetland environments on all three coasts, the Great Lakes, and inland river systems in the United States and abroad. The Tech The Tech Tetra Tech/Marine Mapping Group performs high-accuracy bathymetric surveys using single- and multi-beam echo sound- ing systems designed to evaluate bottom features in marine, coastal, and other environments. These evaluations include dam facilities, such as surveys of forebay and tailrace areas and dam structures to analyze volumes, sediment transport, scour, and general conditions. These surveys are normally conducted using a combination of differential global positioning systems (DGPS) or real-time kinetic (RTK) GPS, inertial-aided posi- tioning, and navigation post-processing, to ensure the most ac- curate surveys possible. Among Tetra Tech?s surveying equip- ment is the RESON SeaBat 7125, one of the highest resolution multibeam sonar commercially available, installed on our own vessels or vessels of opportunity worldwide. Tetra Tech also owns and operates the most advanced processing and data vi- sualization and analysis tools which provide the most complete information possible. Testing Capabilities Testing Capabilities * Mapping in 2-D and 3-D: Tetra Tech has expertise in the collection and manipulation of bathymetric survey data to provide 2- and 3-dimensional mapping * Laser Scanner Surveys: Tetra Tech has adapted a 2-D laser line scanner (LiDAR) to conduct surveys from dynamic plat- forms such as boats and vehicles to collect data for condition surveys, inspections, and time series comparisons. * LiDAR Processing: Vessel-mounted LiDAR processing begins with the initial review of data to ensure that there are no gaps in coverage. Once calibration is con rmed, the data are submitted to automated classi cation routines that  lter and iteratively generate bare earth models. * Side-Scan Sonar Surveys: To provide high-quality imagery and to augment the multibeam sonar data, Tetra Tech scien- tists deploy a high-resolution digital side-scan sonar tow sh capable of covering hundreds of feet on each side of a moving survey vessel to digitally map sea oor topography and locate targets of interest or navigational risks Magnetometer Surveys. 19803 North Creek 19803 North Creek Pkwy, Bothell, WA Pkwy, Bothell, WA Tel: 360-434-7390 Tel: 360-434-7390 Email: Brian.Williams@ Email: [email protected] tetratech.com Website: Website: www.tetratech.com www.tetratech.com CEOCEO: Dan L. Batrack Vice President Vice President: Ronald J. Chu Marketing Director Marketing Director: Michael A. Bieber Engeneering Director Engeneering Director: William R. Brownlie Number of Employees Number of Employees: 13000 Annual Sales Annual Sales: $2.2bTETRA TECH CES/MARINE MAPPING GROUPTETRA TECH CES/MARINE MAPPING GROUPWith 13,000 employees worldwide, Tetra Tech/ Marine Mappingis well outÞ tted for most any projectJuly/August 2012 10 MTRMTR #6 (1-17).indd 10MTR #6 (1-17).indd 108/1/2012 10:42:50 AM8/1/2012 10:42:50 AM