USACE - Alaska IDIQ Contract for Hydrographic Surveys and Related Services Various Locations, Alaska

Our hydrographers use multibeam and/or singlebeam data collection systems for all USACE hydrographic surveys. Water levels are determined using manual observations, recording and/or telemetry tide gauges and Real-Time Kinematic (RTK) GPS. Data is collected with HYPACK, Reson 6042, QPS QINSy or Triton ISIS. We use a variety of our own survey vessels and lease larger vessels for other project-specific work.

Most condition surveys and all dredge support surveys require the computation of volumes. Many of the volume computations involve templates with multiple over-depth computations. We developed and use a "Vertical Grid" method of computing and displaying volumes that is preferred by the Alaska District over cross sections for many projects.

Many of the projects we peform are on short notice (e.g., emergency hydrographic surveys) or in remote and difficult conditions (e.g., mid-winter surveys of Upper Cook Inlet, mid-winter surveys of the Homer Spit, and mid-winter surveys of St. Paul Harbor in the Pribilof Islands).

Other tasks under this contract have been the analysis of historical surveys to determine shoaling trends in Upper Cook Inlet, tracking large vessels across Knik Arm Shoal in Upper Cook Inlet, collecting survey data for modeling efforts, establishing new tide stations to NOAA standards and creating digital base sheets for most of the USACE hydrographic projects in Alaska.

Completed projects are delivered with bound reports, plotted drawings and digital data on CD or DVD. Reports include a general discussion of control found and set, general conditions found, photos from the site, reports from local users, interviews with harbormasters and documentation of hydrographic, tide, topographic and control data.

Back to top