Author Archive

March 30, 2020

COVID-19 Update

As of March 24th, 2020 the offices of the Superior Watershed Partnership (SWP) will REMAIN OPEN to provide essential services as warranted by Governor Whitmer’s Executive Order #2020-21 (Sec. 9). This includes the SWP Main Office (Presque Isle Park) and the SWP Energy Office (Lakeview Arena). However, both offices are CLOSED TO THE PUBLIC. While most SWP employees are working remotely a skeletal staff will be on hand at both SWP offices to provide continuity of essential services.

As Eagle Mine continues to operate as a critical facility, the Community Environmental Monitoring Program (CEMP) will continue environmental monitoring at Eagle Mine and the Humboldt Mill with modified protocols to ensure the safety of SWP and KBIC employees as well as Eagle Mine staff and contractors. This will remain in effect until restrictions are lifted and/or further notice.

For more information contact:

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December 13, 2019

Community Environmental Monitoring Program (CEMP) To Continue Through Mine Life (2025) Under a New Agreement

The new agreement was signed by the the Community Foundation of Marquette County, Eagle Mine, the Keweenaw Bay Indian Community, and the Superior Watershed Partnership on Thursday December 12, 2019. Click here for more.

Seated from left to right are Geri Grant, Superior Watershed Partnership Senior Planner; Kristen Mariuzza, Managing Director of Eagle Mine; Gail Anthony, Community Foundation of Marquette County Chief Executive Officer; and Evelyn Ravindran, Keweenaw Bay Indian Community Director of Natural Resources.





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May 13, 2019

Independent Mine Monitoring Program Expands with Tribal Partnership

The Keweenaw Bay Indian Community (KBIC) recently partnered with the Superior Watershed Partnership (SWP) and the Community Foundation of Marquette County (CFMC) to collaboratively conduct the Community Environmental Monitoring Program (CEMP), an independent monitoring program of Eagle Mine operations. The CEMP program began in 2012 and provides an independent and comprehensive picture of groundwater quality, surface water quality, air quality, plant life and more. To date, the program has focused primarily on Eagle operations at the mine site, the Humboldt Mill and along the designated transportation route.

The new partnership between KBIC and SWP enables CEMP monitoring to expand to include new mining exploration sites in the Sidnaw area and other sites in the western Upper Peninsula. KBIC Natural Resource Department (NRD) technical staff are working with SWP staff to prioritize and conduct all facets of CEMP monitoring and reporting. Prior to partnering on the CEMP program KBIC had requested that SWP include additional CEMP monitoring for unique sites such as groundwater seeps and traditional tribal foods such as blueberries and wild rice. KBIC and SWP have a long history of collaborating on other initiatives including environmental restoration projects and a summer conservation program for tribal youth. The Community Foundation provides an independent administrative and coordination role in addition to assisting with community outreach.

Eagle Mine is located in the Lake Superior watershed and straddles the headwater regions of the Salmon Trout River and Yellow Dog River. The Humboldt Mill is located in the Lake Michigan watershed where treated water from the Humboldt Tailings Disposal Facility (HTDF) is discharged to the Middle Branch of the Escanaba River. 2019 marks the eighth year of CEMP monitoring and the sixth year of monitoring under the “operational” phase of the mine.

CEMP utilizes EPA-approved independent laboratories to analyze monitoring samples collected from hundreds of sites in and around Eagle Mine, Humboldt Mill and the transportation route. The CEMP program consists of four main components: 1) Verification Monitoring, which includes verifying the environmental monitoring conducted by Eagle Mine as required by state permits, 2) Additional Monitoring, which includes environmental monitoring done by SWP and KBIC over and above required state permit monitoring, 3) Publication of Monitoring Results, and 4) Community Outreach. All historic and current CEMP monitoring data can be viewed on the CEMP website ( The SWP will be launching a new, easier-to-use CEMP website with interactive maps in mid-May.


Carl Lindquist, SWP Executive Director

906-228-6095 ext. 14



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February 14, 2019

Air Quality Data from Powell Township Air Station Available Online Soon

Air quality data from the Powell Township air station will soon be available on the CEMP website. Real-time meteorological data at the station can be viewed here.

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November 2, 2018

DEQ Issues Modified NPDES Permit for Humboldt Mill

The Michigan Department of Environmental Quality (DEQ)  recently issued Eagle Mine a modified National Pollutant Discharge Elimination System (NPDES) permit authorizing direct effluent discharge from the Humboldt Mill to the Escanaba River (effective November 1, 2018).

CEMP is currently monitoring all of the effluent parameters included in the modified permit as well as nine additional water quality parameters that are not included in the permit.

To view the NPDES permit, click here.

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