Rush Lake Improvement Association

Rush Lake is Trying to Reduce Internal Loading of Phosphorus

On Thursday January 15, 2015, John Gulliver and Bill Arnold came out to West Rush Lake and collected 50 samples through the ice.  The RLIA drilled the holes and Gulliver/Arnold collected the samples in plastic tubes about 6 feet long and 3 inches in diameter.  They had three graduate students helping and an experienced assistant for a total of 6 people from the Univ. of Minn.

Rush Lake Improvement Association [RLIA] is working with John Gulliver and Bill Arnold, Professors of Civil Engineering at the University of Minnesota, on a 3-year grant awarded in July of 2014.   The grant is provided by the MN Pollution Control Agency [MPCA] and will evaluate the effectiveness of Iron Concentrate to sequester Phosphorus and also the competition between Iron Concentrate and the sulfate ion.

Below are a series of photographs the describe that sediment extraction process.

BELOW: Stan Seidel and Larry Steeves used ice augers to drill through 21 inches of ice.


BELOW: Larry Steeves is measuring the depth to the sediment.  Bill Arnold (left) and John Gulliver (right) are watching.


BELOW: Bill Arnold on left, John Gulliver 2nd from right, the assistant (gold jacket), and 3 graduate students. Note the 6-feet, 3 inch diameter plastic tubes.


BELOW: Assistant on left, Bill Arnold 3rd from left, John Gulliver 4th from left, 2 graduate students.


BELOW: John Gulliver far left, Bill Arnold 2nd from left, graduate student (tinted glasses), assistant in gold jacket.


BELOW: The entire crew.  Note Stan & Larry drilling holes in the distance.  The assistant (who changed jackets) is close to John Gulliver and a graduate student.  In the back of the truck you see some sediment samples in the front of the truck and empty tubes behind.