Ground Water Questions relating to Mining :

The mission of this web site is to provide a forum for information, proposals, and ideas on the use and development of a mineral mine in Lake Township of Menominee County Michigan so you can make more informed decisions about a course of action. 

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Ground water committee meeting of Jan 29 2004
Ground Water Committee
In response to Dr. Gertsch's presentation, Mine-or-ours.info has begun to organize a ground water committee in search of answers to how a mine (should there be one) will affect the ground water and wells of our community. This group of local citizens and company representatives will work together to gather and provide information to those who need to make decisions about this complex issue. Meetings will be announced and open to the public. Gathered information will be posted on our web site and in the Journal as much as possible. The first questions to be considered are. As mine exploration continues and if mining begins how many aquifers will be encountered? What kind are they? How big are they? How do they interrelate?  How many wells do they affect? What do we know about them already? How can we find out more? What methods of dealing with ground water are being considered? Are there other methods that might work better? What systems will be used to protect ground water from acid drainage and heavy metals? Have any of these systems failed and Why? How does blasting affect ground water? Who sets the standards for allowable limits and how will they be monitored? Who will be gathering more information and how will it be funded?
If you have other questions about ground water or this committee please contact us.
Ground water committee meeting of Jan 29 2004

A public meeting to address how a mine (should there be one) and mine exploration activities will affect the ground water and wells of our community, will be held on Thursday Jan 29th 2004. It will be at the Maple Air Apartments Activity center, E 838 Gerue St. in Stephenson from 4-5:30 PM. 
"Protecting our ground water is an extremely vital issue not only on a global scale but especially in Menominee County where we have such an abundance of this valuable natural resource. Protecting it is not only critical to Michigan residents but to all those who border the Great Lakes" says State Representative Tom Casperson. Although he will be in Lansing at the time of this meeting, he will be sending his aide, Dale McNamee, to continue to gather information and listen to concerns. 
 The time was set to accommodate the attendance of Joe Maki from the Michigan Department of Environmental Quality (DEQ). Joe will be involved with permits and overseeing compliance to state regulations involved in this project and will be extremely helpful.
Al Trippel, from Environmental Resources Management (ERM), a consulting firm with 2400 scientists and engineers in 37 countries, will be there from the Back 40 Joint Venture.
Clayton Ebsch of Stephenson, with 27 years experience and knowledge gained with the US Geological Service, will be a valuable asset to represent our community.
Dr. Richard Gertsch, Michigan Technological University professor, will also attend. Dr. Gertsch is currently writing a grant proposal for the university to try to get funding to cover some of the costs for our efforts to address the concerns of our community. With him is James Stewart a grad student in Mineral Economics.
Stephenson High School senior Jamie Eichhorn will represent the Agricultural Issues team for FFA. The team chose the topic of the mine, considering that it is an issue that has brought about much debate in our community. Their team is a leadership team, which means that they are neither for nor against the mine. They are also required to present both sides of the issue. The other team members, also attending, are Colin Phillippo, Anne Nuttall, Katie Beechner, Emily Zweber, and Kim Gaudes.
The County Health Department has been a great source of information and Mike Snyder Environmental Health Supervisor for Delta & Menominee Counties will attend.
Your participation and questions are important to us as we work together to gather and provide information to those who need to make decisions about this complex issue. Gathered information will be posted on our web site and in the Journal as much as possible. Dale Andersen from mine-or-ours will be conducting the meeting
 

How can we protect our Groundwater?
This very complex issue will be a three part series. For our first installment, to give us a little background, we turn to: Robert Mahin, Senior Geologist, Minerals Processing Corporation.
"Groundwater is a valuable resource and groundwater quality is one of the most important environmental issues facing the world today.  In order to protect our groundwater, we first need to understand how it works.  This is a field of geology called groundwater hydrology or hydrogeology.
How water occurs and moves underground is not always clear.  A common misconception is that groundwater collects in cavernous underground lakes or flows in underground rivers. Actually, it’s like a sponge—with the groundwater saturating pore space and thin cracks in rocks.  Nor does groundwater flow like a stream--it moves by diffusing relatively slowly through the rock much like water would seep out of our sponge if it were over-saturated.
A layer of rock or sediment that contains groundwater is called an aquifer. An aquifer may be layer of unconsolidated (relatively loose) sand and gravel, or solid rock like sandstone, limestone, or granite.  An aquifer may be only a few or tens of feet thick to hundreds of feet thick. It may lie a few feet below the land surface to thousands of feet below. It may underlie thousands of square miles to just a few acres. And there can be different aquifers at different depths, thickness, and extent that are separated by impermeable layers of rock.
The water table is the top level of the highest saturated aquifer.  Where the water table reaches the surface of the ground, a spring may be found.
Groundwater is replenished by precipitation and, depending on the local climate and geology, is unevenly distributed in both quantity and quality. When rain falls or snow melts, some of the water evaporates, some is taken up by plants, some flows overland and collects in streams, and some infiltrates into aquifers to become groundwater. 
Groundwater travels through an aquifer only if there are sufficient connected openings, or permeability, in the rock and if there is enough pressure to push it along. How fast groundwater migrates depends on how permeable the aquifer is.  An aquifer made of a rock such as fractured sandstone with bigger openings permits water to move more freely than say, a granite with a fine fractures. Groundwater moves slowly, from less than a foot per day to tens or hundreds of feet per day.
In Menominee County, most household water wells are less than 50 feet deep and pump from aquifers that consist of unconsolidated sand and gravel deposited by glaciers.  Some wells are deeper and draw water from limestone or sandstone aquifers.
In very isolated parts of western Menominee County, the glacial sands, sandstone, and limestone that provide water for most of the county thin out and in some areas disappear altogether, exposing a very different and much older metamorphosed volcanic rock.  Elsewhere in the county this volcanic rock exists hundreds to thousands of feet deep below the sandstone, limestone and glacial sediments.  This rock is largely impermeable and contains very little porosity, rendering it virtually useless as a groundwater resource.  It is these rocks that Minerals Processing Corporation is studying for its mineral content.
By understanding how groundwater moves and where it occurs, we can preserve this most precious of resources.  For more information on groundwater visit the U.S. Geological Survey website at http://water.usgs.gov/  "
Troubled waters on rise in Colorado

By Todd Hartman, Rocky Mountain News 
December 8, 2003 
Colorado's list of polluted streams and rivers is longer than ever, with 125 stretches of water needing some kind of cleanup, according to the state health department. That's about 30 more than the last count. The state's list of "impaired" waters includes river and stream segments in every major river basin, including the Colorado and the South Platte, and names nearly two dozen contaminants harming fish and water quality. Many of the latest stretches added to the list are tainted with selenium, a naturally occurring element. When excessive irrigation sends too much water into the soil, selenium is leached out and carried into rivers. The selenium is most threatening to fish, which can be poisoned. Dozens of other streams are laced with toxic metals such as copper, zinc and mercury that often run off abandoned mines. Others are affected by fertilizers coming off agricultural lands, or by water that leaves sewage-treatment plants. Regulators at the health department's Water Quality Control Division say the growing list of troubled waters doesn't mean that Colorado's streams are getting dirtier, but that better and more prolific data collection is opening their eyes to the extent of the problem. "It reflects a better state of knowledge, not a worsening of water quality," said Phil Hegeman, the state's coordinator for impaired streams. This latest list is a draft, to be finalized in the spring of 2004 after public debate. The proposed 2004 list includes about 30 more water segments than the previous list in 2002. In all, this is the seventh time that Colorado has assembled such a list, dating to 1989. The work is required under provisions of the Clean Water Act, which also calls for creation of a cleanup plan for waters that make the list. Controversy certain Some of the segments undoubtedly will prove controversial. The 2002 list was the source of complaints from several industrial interests who feared that listing certain stretches would require they take costly steps to cut discharges into the streams. Environmentalists also scrutinize the list. Already, Trout Unlimited wants segments of Bear Creek in Jefferson County and the Dolores River below McPhee Reservoir in southwest Colorado to be added, saying fish habitat has been degraded by changes to river flows and temperature. "A decade ago, this river had 40 pounds of fish per acre, and now it has less than 10," Melinda Kassen, an attorney for Trout Unlimited, 
said of the Dolores. "There were browns, cutthroats - they're all gone. (Population) is down 70 percent or more, and they're refusing to list it." But Kassen acknowledged that the Dolores and some other stretches were tricky because restoring fish habitat also could force regulators to address river flows, something that could interfere with private water rights. Colorado law prohibits regulators from altering water rights to correct water quality problems. 
Then there's the Environmental Protection Agency. It wants state regulators to add two other water bodies to the list, as well. They are Red Mountain Creek in southwest Colorado, which the agency believes needs to be cleansed of metals so it can support more fish, and Fountain Creek in Colorado Springs, where elevated levels of zinc threaten aquatic life. That's down from last year, when the EPA and the state came to a standoff when federal officials demanded that Colorado list at least 12 additional stretches the agency said needed attention. That problem was resolved this year, when Colorado relented, agreeing to change the criteria that had prevented the waters from making the list. One of those stretches was on the lower Colorado River, where U.S. wildlife agents feared elevated selenium levels threatened federally protected endangered fish. Colorado regulators countered that the data wasn't thorough enough. This year, the stretch appears on the draft 2004 list. Keystone 'surprised' Another party with concerns about the latest list is Keystone Resort. Colorado has listed three streams near the ski area with high acidity levels. "They were surprised" to see the streams listed, said Sarah Johnson, who oversees assessments of the state's waters for the health department. "They don't believe we have all the data." A consultant for the resort said his firm's studies haven't revealed problems with acidity levels in Camp Creek, Keystone Gulch and Jones Gulch. "We're at the very early stages of looking at this and trying to figure out whether it makes sense to put the streams on the list," said Bob Weaver of the Boulder-based consulting firm Hydrosphere. "And if it does, what the implications of that may be." Weaver said the acidity can be traced to contamination from abandoned mines high on the Peru Creek drainage. The selenium problem Getting the bulk of attention, however, will be the selenium problem. One-third of the 125 stream, river and lake segments on the 2004 list include selenium as a contaminant of concern. Regulators say one of the big keys to reducing selenium concentrations would be to irrigate fields and lawns more efficiently. If just enough water was provided to be taken up by the plants or grasses, then little else would be left to seep into the ground. Lining irrigation ditches with concrete also would help, as that would prevent water from seeping from the ditch deeper into the soil. "It's not that you need to stop irrigation, but sometimes practices can be adjusted," Johnson said. "You try to provide plants with just as much as they need. If you can match that up more closely, you don't have the deep leaching" that extracts the selenium. Regulators, however, have their work cut out for them. As the list grows every few years, projects to stem the pollution take far longer to put in place, making it difficult to ever catch up. Colorado officials do point to some successes, including the cleanup of a site near the Climax Molybdenum mine above Leadville that eased pollutants in the Arkansas River, as well as cooperation among several sewage plants in the Boulder-Longmont area that cut ammonia concentrations in the South Platte basin. But they have plenty to keep them busy. A secondary list of waters, called the "monitoring and evaluation list" amounts to a kind of watch list. It is growing, as well. Waters on that list need more study to determine whether they should be moved on to the cleanup list, or can be left alone. The latest total of water bodies on that list: 143. 

Questions 
Responses
What is the difference between a confined and a water-table (unconfined) aquifer?  A confined aquifer is an aquifer below the land surface that is saturated with water. Layers of impermeable material are both above and below the aquifer, causing it to be under pressure so that when the aquifer is penetrated by a well, the water will rise above the top of the aquifer. A water-table, or unconfined, aquifer is an aquifer whose upper water surface (water table) is at atmospheric pressure, and thus is able to rise and fall. Water-table aquifers are usually closer to the Earth's surface than confined aquifers are, and as such are impacted by drought conditions sooner than confined aquifers http://interactive2.usgs.gov/faq/get_answer.asp?id=543
What is an artesian well?  An artesian well taps a confined aquifer. This aquifer is a water-bearing geologic material below ground that is surrounded by other rock or material that does not allow water to pass through easily. The surrounding material may add pressure on the aquifer, and water in this aquifer can be pushed up the well, sometimes all the way to the surface, creating a flowing well. http://water.usgs.gov/
 

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