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Watershed Achievements Report

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Lake Superior Basin <strong>Watershed</strong> <strong>Achievements</strong> <strong>Report</strong> 2015<br />

Lake Superior River Basin<br />

Projects awarded<br />

St. Louis River River <strong>Watershed</strong><br />

Port Authority Stormwater Study and Concept Design<br />

– 2015<br />

Sponsor: Duluth Seaway Port Authority (Port Authority)<br />

Funding: Clean Water Partnership (Grant) $24,000<br />

Purpose: This project will evaluate the sources of<br />

detected metals and other stormwater constituents, as<br />

well as identify and conceptually design effective green<br />

infrastructure BMPsto address these concentrations<br />

of metals and other constituents in stormwater at<br />

the Port Authority’s Clure Terminal. The project’s first<br />

phase includes development and implementation of a<br />

sampling plan to investigate stormwater quality within<br />

impervious areas for the previously described stormwater<br />

constituents; soil borings to determine the soil type; a<br />

topographical survey to determine drainage patterns and<br />

infrastructure locations; and data gathering of existing<br />

infrastructure and the extent of leased areas. A seasonlong<br />

stormwater quality monitoring program will monitor<br />

stormwater within the drainage areas that flow directly<br />

to the storm sewer, including monitoring of roof runoff<br />

and overland flow to determine potential pollutant<br />

sources and thus mitigation options. The project’s second<br />

phase will propose options for effective BMPs within the<br />

investigated impervious areas. Another component of<br />

this phase will be implementing practices that protect<br />

stormwater through education and outreach to the<br />

Port Authority’s tenants, which represent a variety of<br />

commercial and industrial activities.<br />

Minnesota Pollution Control Agency www.pca.state.mn.us 56

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