Gruber’s Grove Bay Remains Highly Contaminated Site

In 2003, Gruber’s Grove Bay on Lake Wisconsin was placed on the federal list of Impaired Waters pursuant to the Clean Water Act.

Despite two previous dredging actions, the bay remains one of the most highly contaminated sediment sites in the State of Wisconsin.

This winter, the Army at Badger Army Ammunition Plant completed a sediment sampling project to delineate and quantify the residual soft sediments and mercury concentrations in Gruber’s Grove Bay.

The results show that approximately 15.84 acres of the 25-acre bay contain mercury-impacted sediment at concentrations exceeding 0.36 parts per million (ppm), a cleanup goal based on concentrations found elsewhere in the river. By comparison, the lowest effect level for mercury that is protective of aquatic life is only 0.2 ppm, according to DNR guidelines.

The Army sediment study was limited to only mercury, omitting 18 other known contaminants caused by the discharge of process and sanitary wastewater during the plant’s active productions years.

The Army will be holding a public informational meeting on Wednesday July 27, 2016 from 6:00 – 7:45 pm at the Sauk City Library to present the bay study results. Information on groundwater testing and the recent abandonment of 100 monitoring wells will also be presented.

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3rd International Congress Hydraulic Engineering Structures and Dredging

Russia’s leading maritime industry Media Group PortNews (www.portnews.ru) holds a traditional annual Congress “Hydraulic Engineering Structures and Dredging” in Moscow. 

The two-day Congress includes the 7th International Forum of Dredging Companies and the 3rd Technical Conference “Modern Solutions for Hydraulic Engineering”.

Infrastructure development is among the real sources of Russia’s economy growth. Construction of port facilities and new hydraulic engineering structures on the country’s inland waterways constitute an essential part of all infrastructure projects. It is important to take into account the best international practices to implement these projects effectively.

The program of the Congress will be devoted to the latest technologies for dredging and hydraulic engineering works. Speakers and delegates will refer to real projects to discuss specifics features of dredging works, as well as dedicated fleet and equipment involved.

To learn more about event, please, contact the organizing committee: snitko@portnews.ru

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