02/14/1995 Minutes - Laserfiche WebLink

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• J, they consider it a variatiou of single family developments since most of their residents come from single family areas and they merely want to change their life style. Mr. Tallon asked how long the developer maintained the property and was advised that their two year warrantee would apply to the condominiuna association. Mr. Basalla stated that they would be willing to post a maintenance bond in the event there were problems with the streets or drainage system. Mr. Whitlatch stated that if anything happened to the structural part of the community within two years of the sale of the last unit, it would be covered their warrantee. Mr. Basalla advised Mr. Miller that they have a contract to purchase the land which they are required to make good on by the end of March, this is an outright purchase, not an option. Mr. Miller asked if this retention system should fail, would their warrantee cover the adjacent homes offthe property. Mr. Whitlatch stated that this could be covered by their liability insurance and by that of their- engineering firm and contractors. In response to other questions by Mr. Miller, Mr. Basalla clarified the wetlands issue and advised that one of the components was having a hydric soil as designated by the soil conversation service and the soil type on this site is not listed as a hydric soil, there might be some small dimple on the site that might be a wetlands. They have not consulted with an expert in this field, but if there were any reason to suspect a wetland, they would. Mr. Whitlatch stated that Mr. Basalla would be qualified to make this determination and since working on wetlands is a major liability today, they are confident that tlus is not one. Mr. Basalla clarified that they received a confu7nation that there was no hazardous waste on: either the commercial or residential portion of the property. He further advised that he did understand that the Master Plan had not been passed in ordinance form, and Council has elected not to change the zoning of the properiy. Mr. Dargas explained in detail how the detention systems for both the storm and sanitary sewers and both will withhold the flow until the peak hours have passed. He explained to Mr. Mauning that the mechanism of the storm sewers consisted of a series of four detention ponds that are connected by a series of pipes, there is nothing mechanical on it. He clarified that, if the storm water never reached the peak, the water would not flow, and there is nothing mechanical to fail. In reference to the sanitary sewer, he explained that the sanitary sewer is 8 inches in diameter, and since the orifice is 4 inches in diameter, it slows down the flow so that it will stay in 560 linear feet of oversize pipe within the system. He advised that the peaks occurred early mornings and late evenings and the irianholes were vented and aerated. Mr. Basalla explained that the last 270 foot segment of- 8 inch sanitary sewer on Sharon Drive and Clague Road will be replaced with a pipe 30 inches in diameter which should improve the situation in the existing development. Assistant City Engineer McDermott stated that this is a worthwhile system which will aid the residents in the area, in that they are carrying the storage down stream and removing the surcharge on the residents upstream. He clarified that if there is more storage capacity down stream it will store there rather than storing upstream, possibly in the connections to the homes there. In response to Mr. Miller's question if this would be a significant assist or a minor assist, Mr. McDermott advised that it should be an intermediate to significant assist and noted that there would be storage on both ends. Also in reference to the storm sewers, there should be about a one third reduction from what it is there now. Mr. Ma.nuing noted that Mr. McDermott was using the term should be, and questioned if it would work. Mr. McDermott restated that it would be a significant reduction. In response to other questions, Mr. Dargas stated that the rainfall figures they used were based on County standards and the system is designed for 5, 10, 25, 50 and 100 year storms and they have reduced the amount of flow of a 100 year storm from 25 to 30 cubic feet per second (cfs) to 5 cfs. Mr. Manving maintained that this area has had extreme rainfalls in the last few years, and questioned 4