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1 <br />NOTE: An ordinary high water mark has not been set by the Department <br />of Natural Resources or Ramsey County. The record high lake elevation <br />was 881 .27 In 1978 during construction of an improved outl et <br />' <br />structure. Since the structure was constructed, many lakes in the <br />area have reached their all-time high. Between 1981 and 1986, the <br />region has gone thr- •-,h the wettest 2-year, 3-year, 4-year and 5-year <br />precipitation cycles on record, according to the State CI imatol og i st. <br />After checking with the noted agencies, a high water mark was set <br />based on the highest elevation reached since 1978 of 878.25. Th i s <br />elevation w i l I be used In the Stormwater Management Plan and will be <br />j <br />reviewed by the Rice Creek Watershed District. A 75 foot construction <br />setback is assumed to begin at this elevation. <br />A. �t4r>n����r_MaD�9Qm�rt_Pl a�_Byl r�m��t� <br />A permit Is required from the Rice Creek Watershed District for <br />this project. A Stormwater Management Plan for this site must <br />address stormwater management for I <br />al contiguous properties <br />owned by the applicant, and must be prepared prior to PUD <br />Application. <br />Necessary <br />information and exhibits that must accompany a permit <br />application for approval of a Stormwater Management Plan include <br />' <br />the following: <br />1. Identl f Ication of adjacent I ands over which the appl scant <br />has ownership or jurisdiction. <br />2. Delineation of r a eas contributing runoff to the site. <br />' <br />3. Design details showing the stormwater runoff rate f ran the <br />developed site does not exceed the runoff rate of the site <br />In an undeveloped condition for both a 1-year and 100-year <br />' <br />return frequency rainfall event. <br />4. Determination of the normal, 1-year and 100-year water <br />elevations for stormwater retention areas. <br />5. <br />Storage volume determination and detention site contours <br />and/or cross sections. <br />6. FI oodpl ai n, shovel and and/or wetlands delineation. <br />7. Outlet structure details with dimensions and elevations <br />related to MSL datum. <br />8. Details of any structures) that will provide fIoatable <br />' <br />trash removal and oil recovery capabi I ities to treat <br />runof f f ram 1-year raI of al I event. <br />9. Description of surface and subsurface soils. <br />10. All supportive hydrologic computations. <br />1 -14- 8621 <br />