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fi ~'ctch m end 2 <br />B. Everer! Jordan Reservoir Nua-iznl A9anagemenl Strate~~ and TNIDL -Public Revie++~ Dr n! ~to <br />V.2 Proposed Nonpoint Source Nutrient Strategy <br />For Jordan Lake Nutrient Sensitive Waters <br />Background <br />In 1983, the NC Environmental Management Commission designated .lordan Lake and its <br />contributing watershed as "Nutrient Sensitive Waters", requiring a plan to reduce nutrient inputs <br />from the watershed into the lake. initially, the NC Division of Water Quality placed phosphorus <br />limits on the discharges of wastewater treatment facilities. However, nutrient problems persisted. <br />The watershed encompasses the high-growth areas of Greensboro, Burlington, Chapel Hill, and <br />western portions of Durham, Cary and Apex.. The extent of growth following the watershed's NSW <br />designation through 1997 is illustrated in Figure 1. <br />Figure 1, Land Cover Changes, Jordan Watershed, 1982-1997 <br />G00.0 <br />SOOA <br />,-. <br />°0 400,0 <br />0 <br />~i <br />,+~ .300.0 <br />y <br />v <br />L <br />~ Z00,0 <br />] 00.0 <br />7982 <br />1,~Oa ~JCs' `yS~ ~Q ~yi <br />C toy Q~S 4o J~ti Oti <br />~~ <br />9 <br />O 1982 ®1997 ~t~~ <br />hi 2002, the NC Division of Water Quality (DWQ) placed the upper New Hope Arm of.Jordan <br />Lake on the state's list of impaired waters, the 30.3(d) list, and identified it as a segment requiring a <br />Total Maximum Daily Load (TMDL.) to meet the water quality criterion for chlorophyll a. Excess <br />nutrients (nitrogen and phosphorus) from both point source and nonpoint source pollution <br />contribute to excess algal growth in the lake, The bullets and Table ]below provide modeled <br />estimates of nitrogen loading fi'om point and nonpoint sources to the entire lake as well as <br />breakdowns of those loadings to both the Upper New Hope and Haw River' Arms of the lake. <br />Phosphorus estimates follow in the same format (B Everett Jordan Lake TMDL Watershed Modet <br />Development, Tetra Tech 2003). <br />DfdrO Modeling &TNIDL. Urail. V-0 pnge A-Li <br />