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II. B. Situation No. 2= This situation is based on the ponding area having the capability of overflowing to another pond or waterway without causing any damage. The pond size in this situation is based on providing storage for a 100 year frequency storm using the Soil Conservation Se.trice method. The amount of runoff varies depending on soils type and the amount of impervious surfaces. Based on the soils and lot sized in Ramsey, the runoff from a 100 year storm generally varies from 1 to 4 inches. The pond size is determined as in the case of situation number one. With an overflow to the pond, the lowest floor does not have to be three feet above the pond overflow level. A one foot of separation is recommended in this situation. Dead End Streets and Cul-de-sacs The City's current policy is to limit the length of cul-de-sacs to 600 feet measured along the centerline from the intersection of origin to the end of the right-of-way. The intersection of origin has been considered as the last point where two streets cross. In the case of Autumn Meadows, the original of the cul- de-sac was the intersection of 166th Lane N.W. and Nutria Street N.W. There have been discussions that since 166th Lane or the south end of Nutria Street does not lead to a main road that the original of the cul-de-sac should be the intersection of 167th Lane and Armstrong Boulevard. If that is the desire of the Planning Commission and City Council, the ordinance should be amended. Another possible change in the ordinance is limit the number of residents located in an area with only one access to a main road. Currently, both temporary and permanent dead end streets exceeding 600 feet are required to have a variance. Variances have been usually granted for temporary dead ends, because they are generally required to exceed the maximum allowable length so they can provide access to the adjacent property. I have recommended that the developers provide a paved cul-de-sac on both temporary and permanent dead end streets. Usually, the length of time a temporary cul-de-sac is in service is unknown. Therefore, paving will eliminate the need for additional maintenance. Paving of a temporary cul-de-sac has been wavied if the plat is constructed in phases and the street is scheduled to be continued in one to two years.