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X-1 <br /> O O` . <br /> CITY of ORONO <br /> •� Municipal Offices <br /> Post Office Box 66 <br /> Crystal Bay,Minnesota 55323-0066 <br /> June 27, 1991 <br /> Roslyn and William Henderson <br /> 150 Wildhurst Rd. <br /> Tonka Bay, MN 55331 <br /> Dear Mr. and Mrs. Henderson: <br /> If you plan to amend the original driveway plan approved at the <br /> time of the final subdivision application for the Senn Addition, <br /> you will be required to file only a conditional use permit <br /> application. A variance application was already considered when <br /> the driveway was approved within Outlot A and located less than <br /> 26' from the edge of the defined drainageway. The driveway plans <br /> have already been approved except for the portion of the drive <br /> that will now encroach the drainageway. The amended plan shall <br /> be reviewed by both the Minnehaha Creek Watershed District and <br /> the DNR. The Watershed District will present the permit <br /> application for the DRN's review and comment. The LMCD will not <br /> be involved in this review. <br /> As for specifications for a driveway, the City Code contains no <br /> standards that govern private drives. Your plan should relate to <br /> the existing road plan approved with the subdivision application <br /> when your consultant designs the portion of the road that will <br /> cross the creek. Care should be given to design road width and <br /> shoulder to provide an adequate level of safety. As for the <br /> sizing of the culvert, you will be responsible for providing the <br /> necessary drainage information to both the City and the Minnehaha <br /> Creek Watershed District so that the culvert is adequately sized <br /> to maintain drainage at both normal and peak flows. It may be <br /> appropriate for you to seek an engineer who has had experience in <br /> preparing for a Minnehaha Creek Watershed District permit. Your <br /> consultant is welcome to review the files of a subdivision <br /> application approved for the property to the immediate east that <br /> involved the same watershed. There is other information in the <br /> City archives that will assist in the gathering of drainage <br /> information. Once the watershed area is defined, your engineer <br /> will be asked to determine the impact of a 100 year storm on. the <br /> watershed, specifically, the amount of flowage through the creek. <br /> The size of the culvert will be based on peak flow needs. <br /> TELEPHONE-473-7357 9 FAX-473-0510 <br />