02-18-1997 Planning Packet - Laserfiche WebLink

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and boulevards to nearby creeks. Estimated cost to construct the public road, including storm sewer would be S142,000. Construction of a private road would consist of a bituminous road with shoulder section and a cul-de-sac and the end of the street. Storm water would be routed by way of graded ditch seaion on both sides of the road. This option would cost app'oxi.mately $71,000 to construct. Grading Construction In either street option, grading of the site will be required. The right-of-way and adjacent properties will need grading for the appropriate street cross-section and to match new grades with the existing. Temporary easements may be required in order to complete this task. If encroachment of adjacent properties is not allow-ed, retaining walls can be used as an alternative. However, this is a costly alternative and not considered. Grading costs of site, which includes tree removal and site preparation, come to approximately $58,000. This cost as'^umes that easements can be obtained and retaining walls will not have to be constructed. Installation of Sanitary Sewer Installation of sanitary sewer was looked at as part of the southerly access to the Sollner-Webb property. Sanitary sewer mains are located south of the property on Tonkaview Lane and east of the property and Wildhurst Trail. A possible route from Tonkaview Lane for a sanitary sewer main to the Sollner-Webb property would follow the streets of Garden Lane and Highview Lane. However, the existing sanitary manhole located at Tonkaview and Garden Lane has an invert elevation of 928 feet. This elevation is higher than the new street at its low point, making installation of sanitary sewer impossible. This option would require installation of a sanitary’ force main, which is too costly and not considered. ^ Access of sanitary sewer to the Sollner-Webb property w'ould be better achieved if the existing sanitary main were extended at the manhole located at Highview Lane and Wildhurst Trail. This manhole location is approximately 700 feet east of Garden Lane. The elevation difference betw'een the two points is adequate enough to install a gravity sanitary main to the center of the south property line of the Sollner-Webb property. The slopes of the existing grade ra.nge from 10% to 12% that would making installation very difficult. The sanitary main would be constructed of several drop manholes to lessen the depth of the main and makes installation easier. Estimated cost to extend sanitary sewer from Wildhurst Trail to the Sollner-Webb property would be $85,000. Access from the North via an existing driveway Street and Grading Construction The northern access consists of utilizing an existing driveway of off West Branch Road (Co. Rd. 151). The existing driveway serves as an access road for three existing lots