Nome Navigation Improvements Nome, Alaska

For this project, the contractor tasked us with providing calibration methods and checks for the Trimble SiteVision system that was installed on their backhoe. SiteVision is a system for heavy equipment that incorporates Real Time Kinematic (RTK) GPS and other sensors to provide the operator with constant information on the position of the equipment and bucket with relation to the project design template. The system provided guidance during construction and was used for much of the daily QA surveys done by the Contractor. Our Company designed and installed a calibration course and verified the correct operation and calibration of the system.

We performed bathymetry and topographic surveys within the entire construction boundary. During the course of the project we provided Pre-Construction and Pre-Dredge surveys, Interim Progress Surveys, Post-Dredge, Post-Construction and Post-Excavation surveys. We were also tasked with conducting a Post-Storm Emergency Condition survey in response to a major storm that damaged parts of the project.

Control surveys of the area were conducted with conventional surveying and RTK and static GPS techniques. Topographic surveys of the breakwaters and construction areas were coducted with RTK GPS. From a skiff, our hydrographers used RTK GPS to provide the horizontal and vertical positioning and an Odom Hydrotrac depth sounder for the single beam bathymetry.

All of the surveys were compared to USACE design templates, and volumes of the materials placed were computed. Deliverables included all raw and processed data, AutoCAD drawings, cross sections and volume computations.

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