Agenda - Council - 10/08/1996 - Laserfiche WebLink

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INTRODUCTION The feasibility study for this project was petitioned by three of six property owners which comprise the Haubrich Addition. Certification of this petition was passed by the City Council on April 25, 1995. The purpose of this study is to determine the feasibility and associated costs for the extension of municipal sewer and water utilities to the existing six lots of the Haubrich Addition. Appendix A contains an exhibit illustrating the benefitted area and identifying the property owners. The improvements anticipated by this project would include sanitary sewer, watermain, sewer and water services, concrete curb and gutter, bituminous sweet replacement, storm sewer, tuff restoration and street lights. DESCRIPTION OF EXISTING CONDITIONS At the present time, the Haubrich Addition consists of six platted lots, five of which are presently developed with single family homes. A sixth lot is vacant. As a result of the extension of sanitary sewer and water service to the Ramsey Elementary School and the Fox Knoll Addition, it is anticipated that a twelve-inch watermain will be constructed along the north side of 151st Lane fi-om County Road #5 through to the western end of the plat, and that sanitary sewer will be extended from the Fox Knoll Addition would be available at the western end of the Haubrich pla[ The five existing residences are currently served by private wells and individual septic systems. The street serving Haubrich Addition consists of a 30-foot roadway with a bituminous curb. DESCRIPTION OF IMPROVEMENTS As described above under the description of existing conditions, it is anticipated that a twelve-inch watermain will be extended behind the northern curb line of 151st Avenue to service the Fox Knoll development. This watermain will be available to provide water service to existing and future lots. An eight-inch sanitary sewer will be extended from the western edge of the plat down the center of 151 st Avenue up to County Road #5. A total of 23 service laterals for sewer and water will be stubbed to the property lines for the existing five residences and also for 18 future home sites. The number of future lots was determined by the maximum number of lots that could be created within current zoning guidelines, taking into account side yard setbacks from existing dwellings and property lines. If the project proceeds to design, individual property owners will be contacted to deterrrdne the preferred number and locations for service laterals. Storm water will be collected by two catch basins which will be installed in the low point of 151st Avenue, approximately 500 feet west of County Road #5. These catch basins will be directed northward, through a 15dnch pipe to a low-lying area located within an existing drainage and utility easement located in the northeast corner of Parcel E. This natural low area may be excavated to meet the requirements for sedimentation. A tufted swale overflow from the sedimentation pond will be constructed through the 40 foot drainage and utility easement along the northern boundary of Parcels E and F, where it will discharge into a large wetland body. Following construction of the underground utilities, the street will be paved with two inches of bituminous pavement over a four-inch gravel base. The width of the road will be 30 feet between flow lines of surmountable concrete curb and gutter which will replace the existing bituminous berm curb. Disturbed areas behind the curb will be restored with a minimum of four inches of top soil, fertilizer, seed, and mulch. Driveways will be neatly saw-cut and replaced in-kind with the existing material. Street lights will be placed down 151st Lane at approximately 250 to 300 foot intervals. ESTIMATED COSTS The project is summarized in Table I below. An itemized breakdown of the construction costs are presented in Appendix B. The construction costs summarized in Table 1 have been divided into I I I i I I I I I I I' I I I I I I I