Dredging News

Rohr Sand und Kies, based in Waldsee near Speyer in Germany received their second fully electric driven ISD 300 from IDRECO BV.

Two years ago Rohr bought their first deep dredger from IDRECO for their plant in Bensheim. After one year of working with the new IDRECO deep suction dredger, the decision was made to also replace the existing bucket ladder dredger at the plant in Waldsee. One of the reasons was deeper dredging, but also the higher efficiency of mining with a suction dredger of IDRECO. This made them decide to purchase a second dredge within two years.

This IDRECO ISD300 dredger is equal to Rohr’s first dredger and is equipped with an underwater IDP300 dredge pump. This is directly driven by a submersible electric motor with a power of 315 kw and frequency driven. A jet water pump with a capacity of 250 m3 at 9 bar pressure is placed inside the starboard pontoon and feeds the 8 jet nozzles on the jet suction head.

The maximum suction depth of the dredger is 32 meter below water level and it has a production output of 300 tons material per hour.

Installation of the IDRECO Dredger Control System guaranties maximum efficiency in dredging and means maximum production with as less energy use as possible. A DGPS system is also installed on the dredger to monitor the mining volume and depth which makes it possible to mine the maximum amount of cubic meters out of the licenced plot.

Press Release, June 11, 2014

HR Wallingford, Central Dredging Association (CEDA) and International Association of Dredging Companies (IADC) scheduled their “Environmental Aspects of Dredging” training course for 18-19 June 2014, in Howbery Park, Wallingford, Oxfordshire, UK.

This two day training course will cover the scope and importance of the environmental aspects of dredging projects, the management of dredged material and the typical legislative conditions and controls imposed by international conventions and regional agencies.

Topics that will be covered include:

• an overview of the “players” who may become involved in dredging projects and their perspectives;
• main types of dredging equipment, their environmental effects and possible mitigation measures;
• pre-dredging site investigations, monitoring and dredged material management;
• workshops where participants are split into small groups to find solutions for dredging projects closely resembling real-life dredging situations.

More Info

Ohio EPA has identified $10 million dollars of funding from Governor John R. Kasich’s capital budget to promote alternative beneficial uses for Toledo Harbor dredge materials.

An agreement between Ohio EPA and the U.S. Army Corps of Engineers will allow dredging of Toledo Harbor and the federal shipping channel to proceed while moving toward an eventual goal of eliminating open lake placement of dredge materials.

Under the condition, a first-of-its-kind agreement between USACE and Ohio EPA, the State of Ohio will evaluate various beneficial use options for the dredge material. Once a project is identified, the USACE will provide dredge material for the project. Since the USACE is required to utilize the least costly, environmentally acceptable method of placement, which is open lake placement, the state will pay the difference between open lake placement and the alternative use.

Examples of beneficial use include soil amendments, landfill cover, fill dirt, wetland habitat restoration and agricultural uses.

Up to $10 million of funding is available this year through the state capital budget, made possible under the leadership of State Senator Randy Gardner (Bowling Green), with the support of the Ohio General Assembly and Governor Kasich.

Ohio EPA will work with local partners, including the Toledo Port Authority and City of Toledo, to evaluate the recommendations of the 2012 Toledo Harbor Sediment Management and Use Plan, which identified and evaluated potential beneficial-use options of dredge material.