Secondary and Cumulative Impacts Master Management Plan - 2014

SECTION2–BACKGROUNDANDDESCRIPTIONOF INFRASTRUCTUREMASTERPLANS

source, reduce withdrawals from the source, and reduce the amount of treated effluent to the receiving stream, which is a goal of the Clean Water Act under the National Pollutant Discharge Elimination System (NPDES) program. 2.2 Water 2.2.1 Existing Water System The Town obtains its drinking water from Jordan Lake. The water is treated at the Cary/Apex Water Treatment Plant (WTP), which is located in the Town of Apex’s jurisdiction. Raw water from Jordan Lake is conveyed approximately 4 miles to the WTP, which is located on Wimberly Road (State Route [SR] 1603). The WTP has a current capacity of 40 MGD. To distribute water, the Town of Cary maintains approximately 103 miles of transmission lines, with diameters ranging from 2 to 42 inches within the Town of Morrisville. No pump stations or storage tanks are present in the Town (CH2M HILL, 2009). Figure 2-3 illustrates the existing water infrastructure in the Town of Morrisville. 2.2.2 Future Water System The Town of Cary developed its Water Distribution SystemMaster Plan (Water Plan) in June 2009 (CH2MHILL, 2009). This effort involved creating a new water distribution system model, including the Town of Morrisville’s system. The Water Plan recommends improvements outside of the Town to improve service to the Town’s existing and future residents. Additionally, the plan recommends further demand studies and potential modification of pressure zone boundaries and storage to improve system efficiency. Future water lines are shown on Figure 2-3. Any future construction would occur under the direction of the Town of Cary. A detailed explanation of proposed capital improvements is presented in Appendix C. Exact locations of the proposed infrastructure will be determined during development of the environmental documents, which will examine the direct impacts of the infrastructure. However, general locations for the infrastructure are known and supported by land use planning and population projections; therefore, SCI are identifiable at this time. The Cary/Apex WTP is being expanded to 56 MGD and a portion of the generated potable water will serve Town of Morrisville’s residents. Construction is expected to be completed in 2016 (Town of Cary, 2014b). In 2013, the Town of Cary developed a Long-Range Water Resources Plan (LRWRP), which will guide the development of water supply and resource management solutions that are financially responsible and maintain a high quality of service for the Town of Cary’s customers, which include the Town of Morrisville. The LRWRP takes a strategic long view, through 2060, to meet the Town’s water resources challenges in a dynamic and holistic way, through development of a Water Resources Portfolio. The Portfolio provides a mix of practical strategies that the Town can apply to meet its water resources responsibilities by implementing the right actions at the right time (CH2M HILL and Brown and Caldwell, 2013). The LRWRP identifies water supply and resource management options for implementation.

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