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9 Mr. Steve Ach <br /> May 18, 1995 <br /> Page Four <br /> of the building home sites with the natural topography of the area. This <br /> should lend itself to the ability to save many trees in the rear of each <br /> property. We would also note that, in our meetings with the Developer, he <br /> has indicated that the grading process will individually mark trees in the <br /> fronts of lots that can be saved. In areas of little or no cut or fill activities, <br /> large specimen trees would be noted for saving, even ones that would <br /> require small retaining walls or other measures to protect them and blend <br /> them into the final product. <br /> ■ The City ordinance sets the maximum street grade at 8%. There are several <br /> locations, specifically in the northern part of this development, where <br /> proposed street grades exceed this maximum slope. However, there are <br /> other items that we believe the City should balance in reviewing these areas. <br /> Those would be the layout of the lot relative to the natural topography and <br /> the vegetation. We can certainly envision a situation where an 8% street <br /> grade could be exceeded if there are benefits such as saving substantial <br /> stands of significant trees. In reviewing such an issue, we would look at the <br /> • amount of traffic, the ability to provide a flat area for stopping, the ability <br /> for the Street Department to keep the area clear of ice and snow during the <br /> winter months, and the site distances provided through these types of <br /> vertical curves. In order to make a final determination on the specific issues <br /> relative to this plat, we would recommend that the Developer supply <br /> additional information such as street profiles, cross-sections, and other <br /> information which would support his position for asking for deviation from <br /> the maximum street grade. <br /> • No storm drainage calculations have been provided at this point in time. <br /> The concept of storm drainage laid out on the Preliminary Grading Plan <br /> provides for collection of runoff with a small diameter storm sewer system <br /> and depositing it into various lowlands. These ponding areas would have <br /> no outlet; therefore, they will need to be designed for a worse case scenario. <br /> Also, sedimentation ponds will need to be provided prior to any areas <br /> proposed to discharge to designated wetlands. <br /> • There are several areas on the Grading Plan where contours are either <br /> missing or mislabeled. These need to be corrected in future submittals. <br /> • As this project moves forward and more specific drawings are provided for <br /> the first phase, we would recommend that the City require the Grading and <br /> 0 Development Plans be prepared at a larger scale. It is very difficult to do <br /> a detailed review of this type of area at such a small scale. <br /> 230/258-1802.may <br />