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Exhibit A <br /> II/~ FF <br /> BALZHISER & HUBBARD B ~ 9~~ <br /> ENGINEERS ~S <br /> Mechanical .Electrical .Civil .Transportation .Surveying <br /> <br /> February 9, 2005 <br /> John Bonham <br /> City of Eugene PW Engineering <br /> 244 E. Broadway <br /> Eugene, OR 97401 <br /> Re: Proposal for Civil Engineering Services <br /> Division Wastewater Pump Station Upgrade <br /> Dear John: <br /> Balzhiser & Hubbard Engineers is pleased to present our proposal for civil engineering services for the <br /> Division Wastewater Pump Station Upgrade. The project and our scope of services are further described <br /> below. <br /> Proiect Descriation <br /> The project consists of upgrading the existing pump station in its current location to provide additional <br /> capacity and more efficient pump operation. The existing wet well is inadequate in depth and size to <br /> properly cycle the pumps and meet the flow requirements. The scope consists of constructing a <br /> replacement wet well adjacent to the existing wet well. The project also includes replacement of the <br /> existing raw sewage pumps and controls, and the construction of a new paved access driveway. The <br /> project site is in the southeast corner of the St. Vincent DePaul thrift store property at the corner of Lone <br /> Oak Avenue and Lone Oak Way. The City has purchased additional easement area adjacent to the <br /> existing easement to site the new wet well and associated improvements. <br /> The new wet well is currently designed as an open caisson. Anew 12-foot diameter, 30-feet deep, <br /> concrete caisson will be constructed next to the existing wet well and sunk to final grade. Dewatering <br /> will be achieved through the use of well points placed around the perimeter of the caisson and <br /> groundwater will be pumped continuously to lower the local groundwater table. Groundwater will be <br /> disposed through a conveyance system that leads to an open channel north of the site. It is anticipated <br /> that construction will take place in late summer when groundwater levels are generally lower. <br /> A geotechnical boring near the west edge of the proposed wet well was completed by Professional <br /> Services Inc. (PSI) on June 7, 2004. PSI Report Number 722-45010-1 indicates that the subsurface <br /> materials consist of 15.5-feet of sandy silt with intermittent thin gravel layers, underlain by dense, sandy, <br /> bar run material to the fmal boring depth of 36.5-feet below ground surface. Groundwater was <br /> encountered at 18.5 feet below ground surface. No effort has been made to estimate the pumping rate <br /> required to lower the local water table below the excavation. <br /> During construction, the existing pump station will need to remain in operation with limited shut-downs <br /> as needed for critical equipment replacement and tie-in work. During the limited shut-downs, temporary <br /> by-pass pumping will be required to maintain system flow. The specifications will require that the <br /> Contractor design the by-pass pumping system in accordance with DEQ requirements. <br /> The project site is bordered by several commercial properties and a retirement home. The City will be <br /> lead on any public outreach including informational meetings, notices, and response to any complaints. <br /> 100 West 13th Avenue, Eugene, Oregon 97401 • P.O. Box 10347, Eugene, Oregon 97440 <br /> Phone: (541) 686-8478 • Fax: (541) 345-5303 <br /> www.bhengineers.com <br /> <br />