![]() Such material “is more likely to be contaminated by the runoffs from farms and city street systems,” which might include petroleum and animal waste, said McGinnis.Īccording to Tapp, if dredged material is contaminated, it will be transported to a controlled place, usually a confined disposal facility, to make sure it does not harm the environment. The sandy material can also help prevent nearby beach erosion, according to the Corps’ report.īy comparison, inner harbors contain more material washed down from upland areas and the drainage basin. The city manager of Grand Haven, Pat McGinnis, confirmed that the sandy sediment in the Grand Haven Harbor was washed in from Lake Michigan, so putting the dredged material near shore is just to “put it back where it is from. That kind of dredged material is clean and usually put on the beach. Outer harbors are primarily made up of sand, which moves up and down the beaches and usually blocks off the entrance to the harbor. “The test result dictates where we will put the material,” Tapp said. Sediment dredged from the two harbors will be put along the nearby shoreline.Īccording to “Dredging on the Great Lakes,” a Corps report, the sediments are periodically test. Those two projects, which will begin in early April and end by late May, cost $657,500. of Holland, Mich., to remove extra sediment from Grand Haven and Holland harbors. The most recent contract was awarded to King Co. Other harbors may not have that opportunity. Mary’s River, Grand Haven Harbor, Holland Harbor and the Milwaukee River, which have high-value commercial traffic, are on the funding list every year. Lynn Rose, a Detroit District public affairs officer, said a number of sites, including the Detroit River, Green Bay Harbor, St. And “there are always additional needs beyond those projects.” The number of federal dredging projects fluctuates yearly depending on funding, said Jim Tapp, the chief of the Corps’ Technical Services Branch operations office. In all, Congress allocated an additional $46.5 million in dredging funds for the entire Great Lakes. That allows the district to include eight new projects and increase funding for four of the original projects. But Congress recently allocated an additional $17.8 million. Army Corps of Engineers Detroit District had planned eight dredging projects in Michigan and Wisconsin for 2014 worth $13.2 million. ![]() That’ s why harbors need dredging, or excavating the gradually accumulated material at the bottom of the water and transporting it elsewhere. Everybody knows water flows, but not many people know that the sediment below it does too.
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