Agenda - 08-25-2008 - c1 - Laserfiche WebLink

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~/ benefit from an additional fire hydrant and better volume for fire protection and, because of the additional benefit to the school, the option crossing the Efland Cheeks Elementary site is preferred. The Fire Marshall has confirmed that no dead end water lines will be approved. All lines are required to be looped. Therefore, a connection westward to an existing 6" line in Richmond Hills subdivision is recommended to provide secondary water flows to the both Efland Commons and Richmond Hills. Tying into the existing 6 water line at the end of Alice Miller Court in Richmond Hills will help with volume and potentially'equalization of pressure within the water network. A 20-foot permanent recorded easement across the common open space of Richmond Hills would be required following an approval action by the Richmond Hills HOA Board of Directors. An encroachment agreement with NCDOT will be required prior to construction within Alice Miller Court. The most likely location for the connection to occur within Efland Commons will be between lots 29 and 30. A stream crossing will be required to make the connection. Additionally, County staff recommends that the proposed 8" inch water line along Tinnin Road be extended eastward to connect to an existing 8" water line located within Ashwick subdivision, specifically in the Benwich Lane right-of-way. One owner has indicated an openness to allow the connection across his land. There are two other options for the last 150 feet towards Ashwick. One option is to obtain an easement from the HOA of the Ashwick subdivision to cross common open space. The other option is to obtain an easement from the property owner to the north of the existing stub street of Benwich Lane. Either of the options will require that an encroachment agreement be obtained from NCDOT to place lines within the Benwich Lane right-of-way. Permanent, 20-foot easements to OAWS will be required for water lines that cross private property. Sewer This project is entirely within the 10-year transition area of the County's Land Use Plan and Phase 1 West of the Efland Area Sewer Overall System Plan. The County sewer system will provide wastewater service to this subdivision. The BOCC will be asked to approve the extension as a part of this Planned Development request. The entire system has been designed for gravity flow to existing lines and manholes within Tinnin Road right-of-way. The County has an agreement with Hillsborough to discharge up to 300,000 gallons per day of wastewater into Hillsborough's treatment plant. Currently, the flows are approximately 25,000 to 30,000 gallons per day. Anticipated wastewater flows from this subdivision are estimated to range from between 21,000 to 25,000 gallons per day. The increased flow volume is expected to actually improve the situation in the main line to the treatment plant Hillsborough. All sewer lines are proposed to be 8" diameter PVC in accordance with County specifications. This project does not impact the proposed new sewer lines and pump station to be installed at Brookhollow Road. The flows from this subdivision will be handled by the McGowan Creek pump station, which has adequate capacity per the County Engineer's office. Currently, the County does not bill customers connected to the Efland Area System the full costs (treatment, maintenance, electricity, etc.) of operating the system. The full costs of operation are approximately $19.68 per thousand gallons billed. The current rate billed is approximately $5.62 per thousand gallons or a subsidy of approximately $14.02 per thousand gallons. The anticipated wastewater flow for the subdivision is approximately 22,000 gallons per day which would result in a subsidy of $308 per day or $9,253 per month.