Capabilities
Tidal Studies
One of the most important correctors for hydrographic data is tide and water levels. TerraSond installs and operates tide stations during remote survey operations to measure tide and water level. Data from the stations can be recorded locally or transmitted over telemetry or a NOAA GOES (Geostationary Operational Environmental Satellite) system for review and quality control. Datums are computed, tidal zoning is adjusted based on the measurements, and final zoning and tide reducers are collected prior to leaving the survey area.
Related Projects:
- NOAA Charting - Unimak Pass
- Unimak, Alaska
- TerraSond was contracted by NOAA to provide modern hydrographic survey data for updating the nautical charts north of Akun Island, Alaska, and also a portion of the Safety Fairway through Unimak Pass connecting the Bering Sea with the North Pacific Ocean.
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- 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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- Coal Facility Landing Site
- Cook Inlet, Alaska
- Our hydrographic surveyors provided multibeam bathymetry and collected marine geophysical and current data to aid in the development of a trestle and dock for the shipment of coal mined from a coal facility landing site in Cook Inlet, Alaska.
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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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- 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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- 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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- 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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- Wrangell Narrows Tide Stations
- Wrangell, Alaska
- We were tasked by the USACE - Alaska District to conduct tide surveys for the purpose of refining and adding continuity to the historical Tidal Datums located along the southern end of Wrangell Narrows, Alaska. The four selected tide stations provided vertical control datum for two USACE - Alaska District projects located within the vicinity of Mile 12 to Mile 21.
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- Conceptual Engineering Services
- Anchorage, Alaska
- We participated in a road design and construction plan for a bridge across Knik Arm, a branch of Cook Inlet near Anchorage, Alaska. Our office staff collected background information about land and sub-sea contours, inlet currents and ice, area biology and regulatory requirements to provide to our client.
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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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- Benthic Habitat Mapping
- TerraSond collected multibeam bathymetry and backscatter information to support the development of a habitat based method of estimating the number of rockfish and other ground fish near Nuka Bay and the Pye Islands in Alaska.
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