Agenda - 06-30-1999 - 8c - Laserfiche WebLink

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MEMORANDUM TO: County Commissioners John Link, County Manager FROM: Paul Thames, PE, County Engineer DATE: June 21, 1999 SUBJECT: Wastewater infrastructure serving the proposed Bazber & Ross Company and the existing Hancor manufacturing facilities 3 The purpose of this memorandum is to address several questions raised by the BOCC in its discussions relative to extending sewer service from the Efland sewer system to the proposed Barber & Ross Company facility at the old Redman Homes building west of Efland. The Redman Homes building lies approximately 2000 feet west (along US Hwy 70) and 1000 feet south (down Redman Crossing and across the Norfolk-Southern railway) of the western-most end of the gravity sewer collector portion of the Efland sewer system. A small two inch diameter wastewater force main serving the Hancor facility (which is one mile further west along Hwy 70 from the Redman Homes building) does lie along the northern shoulder of US Hwy 70 and passes 1000 feet north of the Redman Homes building. Although sewer service extended to the Redman Home building must be provided by means of a wastewater pumping station and force main, it is not proposed to have the force main from the Redman Homes building tie into the existing Hancor force main. The proposed system for the Redman Homes building will consist of a small pumping station on the north side of the site with a small diameter force mavn extended to the north, passing under the railroad, in the shoulder of Redman Crossing. The force main will then pass under Hwy ?0 and will run eastwazd along the north shoulder of Hwy 70 and parallel to the Hancor force main for approximately 2000 feet. At that point, the proposed force main will connect to and dischazge into the western-most gravity sewer manhole in the Efland sewer system. The Hancor force main discharges into the same manhole. There aze a number of reasons why it has not been proposed for the Redman Homes force main to tie or be tapped into the existing Hancor force main. Several of these reasons aze technical issues related to the efficacy of tapping sewer force mains, sizing and re-sizing of the Redman Homes and Hancor force mains, and the use and maintenance of mechanical components in a wastewater environment. These issues and concerns have been resolved from an engineering design standpoint in discussions between the design engineer for the Barber & Ross Company and myself. I will be happy to expound on these issues in detail if necessary. Other reasons for not tying the force mains together are policy issues relating to County land use strategies for extending sewer service and the BOCC's adopted rules of operation for the Efland sewer system. These rules expressly prohibit the tapping of sewer force mains to provide sewer service. The BOCC is asked essentially to make two decisions relative to the Redman Homes sewer system: 1) to allow the extension of sewer service from the Efland sewer system; and 2) to agree to accept ownership of the portion of the wastewater force main system which will be installed in NCDOT rights- of-way (an NCDOT pre-requisite for allowing the installation of a utility service in its rights-of--way). The County may also be asked to accept ownership of the portion of the force main crossing the NC Railroad Company/Norfolk-Southern Railroad right-of--way. At this time it is not know if the railroad