11-25-1991 Council Packet - Laserfiche WebLink

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Zoning Fil« «1691 i #1702 November 21, 1991 Page 6 Orainage/Plood Plain/Netlai»ds The DNR has determined the Ordinal y Water Mark of the pond/lagoon area is 943'. The top of th--* bank of the lagoon is at 947 elevation. Cook has reviewed the hydraulic information submitted by applicant in determining the flood plain elevation. It fs^tpearj the flood plain elevation is at approximately 947.3*. Baseh on previous lews and the standards of th«> MCWD, all run-* off from development must be retained above the fl'^od plain elevation. The sewer pond area cannot serve as a retention area because it is belcv the 947.3 elevation. Retention must be provided at the higher elevations. Major portin'.s of the surface run-off from the development will now be directed to the retention pond located within Pads 11 and 12. Th- riajor cut in the cul-de-sac portion of the road will tc’ the majority of drainage from Pads 4, 5, 6, 7, 8, 9 and 10. The rear or easterly elevations of Pads 3, 7 and 8 will flow as driinage currently flows through the drainage network of the Orono Oaks plat. The rear portions of Pads 1 and 2 will flow eastward to a wetland in the Orono Oaks plat via a culvrrt under Orono Oaks Drive. Fad 1, Block I's drainage will flow predominantly to the wetland to the north and the creek. Appropriate drainage easements will be taken within Pads 11 and 12 and over all drair.ageways created to support the interior drainage system. Eventually drainage from the detention area in Pads 11 and 12 will drain either to the lagoon or directly to the creek depending upon the final determinations of the MCWD. .Applicant's final grading and drainage plan shall provide detail on how drainage shall be conveyed from retention pond to eit*^sr lagoon or Long Lake Creek. gracing plan. Exhibit V- «et 3, shows the elevation of first habitable floor of each pad. Note all elevations meet required elevation (948.3 or 1 above flood plain elevatioi.). Hanning Commission Recommendation The Planning Commission g:a.nted approval of the co*npxel/ensive land use application of the City of Long Lake seeking approval of variances to .*?ection 10.32, Subd. 2 for 13 units where only 12 units would be si .owed based on total acreage at 24.5 acres and a variance to V'<^ction 10..^5, Subd. 8 to permit the further <;■ v..Toachment of a irr.adway into a designated wetli:nd an grants , onditxonal use permit for a Planned Residential Development of 13 lots and approves a Comprehensive Plan Anendner that would allow the extension of sewer and water to the rurax zoned properl:y requiring a realignment within the Metropolitan Urban Service Area o the City. Approval of the variances are based on cither one or more of the following findings: L