Single Beam Sonar Surveys
Single beam sonar is the simplest of depth measurement systems we use. It is also the most portable, least expensive and often the best choice for surveys.
We maintain a huge inventory of depth sounders and transducers. Many of the transducers are built into the hulls of our vessels or kept for spares and vessels of opportunity. We have several methods for the collection and processing of single beam survey data.
Related Projects:
- NOAA Charting - Alabama, Louisiana and Mississippi
- Gulf of Mexico
- We were contracted by the U.S. Department of Commerce, National Oceanic and Atmospheric Administration (NOAA) to provide sidescan, single beam, and multibeam sonar services for Debris Mapping of the Alabama Fairways and Perdido Bay in the Gulf of Mexico.
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- Nome Navigation Improvements
- Nome, Alaska
- We were contracted by a large construction company to establish a control network and to provide progress checks for hydrographic and topographic surveys for the U.S. Army Corps of Engineers (USACE) - Alaska District in Nome, Alaska. Our surveying services were used to support the design project for a new harbor and entrance. Included in the project was also a large breakwater extending offshore.
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- NOAA - Alaska IDIQ Contract for Hydrographic Surveys and Related Services
- Various Locations, Alaska
- Since 1998, we have supplied the U.S. Department of Commerce, National Oceanic and Atmospheric Administration (NOAA) with hydrographic data of 100% bottom coverage with shallow-water multibeam sonar systems.
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- USACE - Alaska IDIQ Contract for Hydrographic Surveys and Related Services
- Various Locations, Alaska
- Since 1995, we have provided the U.S. Army Corps of Engineers (USACE) - Alaska District with hydrographic, topographic, and Global Positioning System (GPS) control surveys; aerial photography; LiDAR mapping; and tide studies on over five hundred projects throughout Alaska.
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- Bethel Bank Stabilization
- Bethel, Alaska
- TerraSond provided surveying and Global Positioning System (GPS) control surveys for the Bethel Bank Stabilization project; a project that has involved city, state and federal agencies for the past twenty years.
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- NOAA Charting - Upper Cook Inlet
- Cook Inlet, Alaska
- NOAA contracted us to supply hydrographic surveying data for 54.3 square miles of Cook Inlet, Alaska. Afterward, 3,898 lineal miles of multibeam surveys, and 55 lineal miles of side scan sonar surveys were added to the contract.
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- NOAA - Nationwide IDIQ Contract for Hydrographic Surveys and Related Services
- Various Locations, U.S.A
- We understand NOAA's requirements and have the trained staff and equipment to perform their vital surveys. This 5-year term contract supports NOAA's nautical charting mission in Alaska, the Gulf of Mexico, and all other navigable waters of the U.S., including the East Coast, Pacific, Great Lakes, and U.S. territories.
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- Post Hurricane Ike Emergency Call-out Clearance Surveys
- Various Locations, Texas
- Working closely with the U.S. Army Corps of Engineers (USACE) - Galveston District, along with NOAA's National Weather Service and other agencies, we developed a plan of action before Hurricane Ike hit the Texas coastline.
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- Submarine Transmission Cable Installation
- Cook Inlet, Alaska
- We provided surveying and positioning services to support a 138-kilovolt (kV) submarine cable installation project. These services included a desk-top study, a pre-lay marine survey, a post-lay survey, Global Positioning System (GPS) control survey, and other support services during construction.
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- Kivalina Village Relocation
- Kivalina, Alaska
- We were contracted by the U.S. Army Corps of Engineers (USACE) - Alaska District to provide surveying services for the relocation of the village of Kivalina, Alaska. Services included aerial photography, topographic and hydrographic surveys, and support for field measurements of the existing town-site. The resulting services produced a storm surge analysis for possible relocation of the village.
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- Homer Spit Beach Condition Surveys
- Homer, Alaska
- Tasked by the U.S. Army Corps of Engineers (USACE) - Alaska District, TerraSond conducted beach condition surveys on the Homer Spit in Alaska. Ground topographic surveys were performed using Real-Time Kinematic (RTK) Global Positioning System (GPS) control methods.
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- NOAA Charting - Tongass Narrows
- Ketchikan, Alaska
- We surveyed 1,666 lineal miles of sea floor with multibeam sonars and verified 92 miles of shoreline using National Geodetic Survey (NGS) Remote Sensor Data (RSD). As a result of the hydrographic surveys, 50 separate items were investigated and mapped.
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- Navigation Channel Dredging - Knik Arm Shoal
- Cook Inlet, Alaska
- We provided USACE Class I dredge payment surveys that included a pre-dredge survey, 13 project condition surveys, and a post-dredge survey for the construction of a navigation channel along the southern flank of Knik Arm Shoal.
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- NOAA Charting - Kasaan Bay
- Kasaan Bay, Alaska
- NOAA contracted us to provide hydrographic surveying and support services in Kasaan Bay, Alaska. This survey was comprised of two Task Orders for multibeam surveying, shoreline verification, shoreline buffer, and Automated Wreck and Obstruction Information System (AWOIS) investigations on 13 sites.
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- Subsea Fiber Optic Cable System
- Northwest, U.S.A.
- In 2008, Alaska Communications System (ACS) installed a 2900 km submarine fiber optic cable across the Gulf of Alaska connecting Oregon and Alaska.
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- USACE - Texas IDIQ Contract for Hydrographic Surveys and Related Services
- Various Locations, Texas
- Since 2003, TerraSond has provided and continues to provide hydrographic surveys and related support services for the Galveston District of the U.S. Army Corps of Engineers (USACE).
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- NOAA Charting - Port Clarence and Nome
- Norton Sound, Alaska
- NOAA tasked us with providing hydrographic surveying and support services for the Approaches to Nome and Port Clarence in the Norton Sound along the Bering Sea, Alaska.
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- Surveys in Support of Mine Development
- Southwestern, Alaska
- Our surveyors used Static GPS to standardize project control on over 4,500 square miles of remote Alaska to support the development of a mineral mining operation. This project required a variety of surveying capabilities and technologies.
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- Hydroelectric Turbine Sites for Alternative Energy Project
- Yukon River, Alaska
- Our staff conducted a geophysical reconnaissance of the Yukon River in Alaska to identify a safe and potentially productive installation site for an in-stream hydrokinetic turbine. This information enabled the client to better understand the resource available to the community for power production and to establish a cost and engineering strategy for future build out.
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- Dredging Surveys and Volume Computations
- Port of Anchorage, Alaska
- We were contracted by a dredging firm to conduct independent bathymetric surveys and compute dredge quantities for the U.S. Army Corps of Engineers (USACE) - Alaska District's Port of Anchorage project. The annual dredging cost for the Port of Anchorage is approximately $10 million.
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