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Ground Water May Contain Decades Old Contamination
Nitrogen and phosphorus are the two plant nutrients in sewage and fertilizer that foul the bay, feeding its algae blooms and "dead zones." Both are washed off the land into streams whenever it rains, but nitrogen dissolves in water, so it also soaks down into the soil, ultimately reaching the water table.

Using a computer model to simulate ground-water flows, USGS scientists found that when nitrogen from fertilized farm fields soaks into the ground, it takes 20 to 40 years on average for the nutrient-laden water to make its way underground into streams and rivers.

 
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Property Owner Wants to Anchor Floating Bog - An unprecedented plan for the sprawling Chippewa Flowage would call for crews to use barges, a crane and a pile driver to pound large posts through the floating bog and anchor it to the lake bed.


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