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QC-ing the QC Equipment

Posted by Dillon Hogan on April 03, 2018

All Systems Go

At Brennan, we utilize hydrographic survey systems to measure progress on all of our dredging projects. These systems typically include a positioning system, such as RTK-GPS, and a multi-beam echo-sounder. The Real Time Kinematic, Global Positioning System, or RTK-GPS, is a precise satellite navigation tool, whereas an echo-sounder is a sonar device for measuring depth. Combining the two allows us to achieve very accurate measurements on the location of the river bottom. We take the data points created during these measurements and create a 3-dimensional model using Hypack® software. By running a survey before we dredge, and then one afterward, we can create two models and compare them to one another. The difference between the two models is the total volume of in-situ yardage that we have removed. Typically, we are paid by the in-situ volume of sediment (in cubic yards) that we remove so it is very important that these measurements are extremely accurate. Therefore, establishing quality control checks on the equipment before we survey is an extremely important step in achieving accurate measurements.

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Waterway Infrastructure from the Eyes of Those Who Build It

Posted by Mark Binsfeld on March 22, 2018

There is a lot of buzz around the president’s infrastructure plan lately. It is clear that everyone wants better infrastructure, regardless to which party an individual may belong. The biggest challenge to getting what everyone wants is funding, and making matters more difficult, the allocation of this funding is another source of disagreement. As a contractor that provides construction services to owners of infrastructure, it is clear that the waterways are suffering the most from lack of investment.

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3 Crucial Steps for Dredging Near Utilities

Posted by Dillon Hogan on January 23, 2018

Dredging around utilities is challenging, and mistakes can be expensive and dangerous. When utilities, such as power lines, natural gas lines or fiber optics, are above ground they can be easily marked, and a plan can be developed to avoid them. However, when these same utilities are underwater, locating them and working around them adds an additional layer of risk for the contractor.

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Advantages vs. Disadvantages of Turbidity Curtains for Environmental Dredging

Posted by Dillon Hogan on January 08, 2018

Turbidity is a hot-button issue in the environmental dredging industry because if it is not controlled, contamination can spread to clean areas. Since every dredge project will experience the presence of suspended sediments in the water column, proper measures are taken to control this problem.

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No Roads, No Problem - The Advantages of Using Amphibious Equipment

Posted by Samantha Schmitz on September 18, 2015

One of the challenges faced during a remediation, restoration, or construction project located
in the middle of a marshland is access.  Typically contractors have to construct temporary roads to safely reach work areas.  This requirement is costly, especially in the case of an environmental remediation project where all materials have to be removed and disposed of as hazardous waste.  Building temporary roads also negatively impacts the sensitive wetland environment and its inhabitants.   There are other options that can save time and money, while greatly reducing the negative impact on both aquatic plant and animal species. 

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