Twin and Ryan Lakes Nutrient TMDL

Document
Description
This Total Maximum Daily Load (TMDL) study addresses a nutrient impairment in the Twin Lake chain of lakes. The goal of this TMDL is to quantify the pollutant reductions needed to meet State water quality standards for nutrients in South Twin (27-0042-03), Middle Twin (27- 0042-02), North Twin (27-0042-01) and Ryan (27-0058-00). South Twin is more commonly known as Lower Twin and North Twin is more commonly known as Upper Twin. Monitoring data in the Twin Lake chain of lakes suggest that the chain is a highly productive system, with the greatest water quality problems occurring in North Twin Lake. North Twin Lake, the uppermost lake in the chain, is a hypereutrophic lake where both internal and watershed loading appear to be significant sources of phosphorous. The majority of phosphorous in Middle Twin Lake is from water coming from North Twin Lake and from the watershed. South Twin Lake is a eutrophic lake where internal loading has the potential to increase algal productivity throughout the season. Ryan Lake, the last lake in the chain, is a deep, mesotrophic lake that has relatively good water quality for an urban lake.
Date Issued
2007-10
Number of Pages
125
Decade
Corporate Author
Publisher
Minnesota Pollution Control Agency (St. Paul, Minnesota)
Publication Series
Body of Water
County
Rights Holder
Minnesota Pollution Control Agency
Rights Management
Public Domain