Lake Management Plan
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Spring Creek at 15823 Sherbrooke Rd Total Phosphorus
This first graph shows the comparison of total phosphorus loading between years. As is typical with streams in Minnesota, the spring thaw combined with spring rains produces the highest phosphorus loading of the year. 2007 was a little higher than previous years, but this is probably due to the new culvert construction. Some of the soil around the culvert washed into Spring Creek during spring thaw and caused higher than normal phosphorus loading. 2008-2011 levels recovered back to average or even below average, showing that the site has recovered from the construction in 2007.
In 2008, spring monitoring showed that there is a delay in loading from upstream to downstream. Phosphorus loading is high in April at the Sherbrooke Rd culverts, then it transfers to the Spring Creek Inlet a week later. In 2011, spring monitoring showed again that there is a delay in loading from upstream to downstream. The levels of phosphorus and suspended solids fluctuate as water flows from Sherbrooke culvert to Spring Creek inlet into Pelican Lake.
Historical total phosphorus loading. The graph below shows that in 2008-2009 this site recovered from the spike in sediment loading due to the construction of new culverts.
