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Email: info@thewassociates.com
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  • About Us
    • Corporate History
    • Professional Staff
  • Services
    • Land Surveying
    • Laser Scanning
    • Hydrographic Surveying
    • Remote Sensing
  • Market Sectors
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    • Energy
    • Environmental
    • Government
    • Industrial
    • Institutional
  • Careers
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Thew Logo
  • Home
  • About Us
    • Corporate History
    • Professional Staff
  • Services
    • Land Surveying
    • Laser Scanning
    • Hydrographic Surveying
    • Remote Sensing
  • Market Sectors
    • Commercial & Retail
    • Energy
    • Environmental
    • Government
    • Industrial
    • Institutional
  • Careers
  • Contact Us
Menu
  • Home
  • About Us
    • Corporate History
    • Professional Staff
  • Services
    • Land Surveying
    • Laser Scanning
    • Hydrographic Surveying
    • Remote Sensing
  • Market Sectors
    • Commercial & Retail
    • Energy
    • Environmental
    • Government
    • Industrial
    • Institutional
  • Careers
  • Contact Us

Water

Projects on the water present unique challenges to professional engineers, scientists, planners, and contractors. Thew Associates has extensive experience working in marine environments providing seamless topographic and utility mapping from upland surveys through transition zones and into deeper water. Working under the direction of a Certified Hydrographer, the Thew Associates hydrographic survey group has the requisite equipment and expertise to undertake a wide range of water based projects.

Hydrographic Services

GPS Positioning
  • Centimeter horizontal and vertical accuracies
  • Sample layout and location
  • Sampling vessel navigation
Sediment Sampling and Analysis
  • Vibracore and gravity core sample collection
  • Sub-bottom profiling
  • Chemical and geotechnical analysis (subcontracted)
Backscatter Data
  • Side Scan Sonar and Snippets
  • Seafloor imagery and classification
  • Object detection
  • Full Water Column
Sub Bottom Profiling
  • Identify and characterize seafloor strata
  • Buried object detection
  • Benthic habitat characterization
Marine Magnetometer Surveys
  • Magnetic object detection
  • Identifies submerged cables and pipelines
  • Archeological features
Acoustic Doppler Current Profiling (ADCP)
  • Velocity and Current Studies
  • Construction and remediation design data
  • Flow rate and direction determination
  • Hydraulic modeling support
  • Wave Height Studies And Monitoring
Bathymetry
  • Single- and multi-beam acoustic data collection
  • Slope monitoring
  • Dredge support services
    1. Pre- and post-dredge surface topography
    2. As-built surface topography
    3. Dredge volume calculations

Mark R. Williams, CH, PLS
315.386.2776
mwilliams@thewassociates.com

Mark R. Williams, CH, PLS
Envelope Phone

mwilliams@thewassociates.com

315.386.2776

Projects

bathymetric survey

Bathymetric Surveying for Pipe Trestle Upgrades at Greenridge Power Plant in Torrey, NY

Read More »

Little Falls Connector Project: Aerial LiDAR Data and Bathymetric Surveying

Read More »

Con Edison – Flushing Industrial Park – Sediment Remediation

Read More »

Boldt Castle and Yacht House

Read More »
bathymetric surveying,CNY Land Surveying

North Burdick Street Quarry

Read More »

Ingham Mills Hydroelectric Development

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Our Locations

Canton
6431 US Hwy 11
Canton, New York 13617

Utica
9478 River Road
Marcy, New York 13403

Syracuse
135 Old Cove Rd, Suite 210
Liverpool, New York 13090

Saranac Lake
589 AMA Way, Suite 211
Saranac Lake, New York 12983

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