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Steelhead Installs Trimble System

Steelhead Constructors Incorporated contracted Measutronics Corporation to install a positioning and guidance system for the 14-inch cutterhead dredge Circle Hill during a three-month maintenance dredging project in the Quileute River. The project was completed the last week of February.

Measutronics installed a system that aided the dredge operators in positioning the dredge, showed real-time cutterhead elevation and cut and fill depths, and provided daily real-time report data for the cutterhead position and depths.

Two Trimble MS132 submeter GPS receivers along with two integrated beacon GPS antennae provided vessel heading and sub-meter positioning. An AGI MD900 Clinometer was installed on the ladder to provide the change in position of the cutterhead relative to water surface elevation. A Valeport 740 tide gauge was installed to record the water surface elevation at five-minute intervals. Two Freewave radio transceivers provided telemetry from the tide gauge to the dredge.

Trimble’s HydroPro Navigation software was installed on the client’s laptop on the dredge to provide the operators the plan view, profile view and text displays of the dredge and cutterhead in relation to design alignments, design cross sections and actual elevation.

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