Agenda - 03-29-2001-1 - Laserfiche WebLink

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~~ Moyi~_forward,with,the,Bond Pro; ect If the BOCC were to determine that it wished to move forward with the bond project independent of resolving the uncertainties, issues and concerns relative to the Efland-Cheeks community and the Efland sewer system as at whole, the canstruction pmject pracess would be fairly straightforward. Staff would . begin the process of soliciting and selecting a design consultant. During the design phase (but after the preliminary design of the gravity collection portion of the system), the BOCC wauld be asked to determine the limit of the service area at east end ofthe band defined area; and 2) depending on that limit, what technologies (STEP systems, etc.) would be allowed for providing sewer service to any pazcels lying beyond the reach of gravity wastewater collection, systems: Given the pmject time frame project outlined below, the BOCC wauld Dave at least three months ai~er deciding to move forward with the bond project to make decisions relative to the eastern limit of the service area. •- - --- - --Moving forward wit's the bond project in the near term would not eliminate future opportunities to seek gran g p g - rvice into other areas currently defined by the master plan or than °°" t finaricin for ex andm sewer se maybe defined by a new master plan. Tf the project were initiated in the near term, the construction plans could be completed in time far the County to have the option of seeking grant funding for the project in the March 2002 grant cycle. Ifthe grant effort was successful, surplus bond funds could then be utilized to pay engineering and construction cost`s for subsequent system expansion. if this strategy is to be possible/successful, however, the BOCC must have authorized staff to move forward with the project by May 1, 2001 and have resolved any service azea boundary/collection system technology issues by August 1, 2001. There have been a number of concerns expressed about the interrelationship between the bond defined project and other phases of system expansion. One question -how the design of the bond defined project infrastructure might impact the infrastructure design of other potential phases of expansion -has been particulaziy bothersome. However, any feaz that the design of the bond project could adversely affect the design process for the infrastructure sewing adjacent areas is a misapprehension. The location and sizing of gravity collectors and pumping station(s) in the bond defined area aze determined solely by considerations of topography, minimum sizing criteria and service area configuration. These and all other design considerations are independent of the existing or potential serc!ice requirements of _ . __ adjoining areas. Furthermore, each of the. sewer master plan phases, the bond-defined sewer azea and the Buckhom EDD are discrete and self-contained sewer service areas. That is, each phase represents a "sub-system" that can exist as a stand-alone construction project and astand-alone service azea comprised as a gravity collection system and a pump station. Because each sub-system has its own pumping station, it can convey its collected wastewater via force main (which -- unlike gravity collector sewer mains -- aze independent of topographical and other layout considerations and can be routed as necessary to connect to and discharge at any point on an existing system) to the existing central Efland collector system.. The western-most sub-systems (Buckhom EDD and Phase VI [Perry Hills]) could just as easily pump waste to the existing Mebane collection system as to the existing Efland system. Questions about the impact of the existing and the, grpwth-related sewer demand of the bond area on overall system capacity can also be readily addressed. The overall system collection and pumping capacity is approximately 500,000 gallons per day (gpd). The existing sewer collection and treatment contract with Hillsborough is for approximately 350,000 gpd. Current sewer use in Efland is