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Zoning File #2086 <br />November 15,1995 <br />Page 2 <br />List of Exhibits <br />A - Application <br />B - Plat Map <br />C - Property Owners ’ l-ist <br />D - Callan Memo 11/15/95 <br />E - Grading Plan <br />F-1-2 Engineer ’s Report Plus Guidelines <br />G - DNR Handout Excavated Pond for Waterfowl <br />H - Plat of Old Crystal Bay Road Addition Locating Designated Wetlands <br />I - Soil Delineation Map Locating Designated Wetland Type 2/3 (Basin 8 and Basin 9) <br />Discussion <br />Applicant proposes the excavation of approximately 6,250 s.f. or .143 acres of spoils within a <br />designated wetland to create an open water area. Applicant hopes to attract waterfowl to a <br />permanent open water area. The Type 2 wetland contains open water areas only during wet seasons <br />of the year. On staffs inspection we found a wetland with predominantly cattails and some canary <br />reed grass. The Engineer's Report Exhibit F-1-2, reports no problem with the proposed excavation <br />of the open water area as long as certain guidelines are followed. The side slopes are tw steep at <br />4:1. The guidelines included with the Engineer ’s report suggest an 8:1 side slope. Portions ot the <br />pond have a depth of 2-3' with a maximum depth of 4’ over 25% of the pond ’s surface. Per the <br />attached handout fiom the DNR concerning excavated ponds for waterfowl, it would suggest even <br />a more irregular shoreline with the flattened side slope. <br />As predominant cattail growth exists within this portion of the wetland, the Engineer rccommen^ <br />that the topsoil be salvaged for respreading over the disturbed area. Cattails will grow once again <br />within this area of the topsoil. All disturbed areas should be restored with seeding using a wetland <br />seed mixnire such as Mn/DOT mixture 250. Applicant may also be advised to construct the pond <br />with a more irregular shoreline to further encourage use by waterfowl. <br />Per the DNR handout, the size of the open water area should be no smaller than 2,500 s.f. <br />Applicant's dugout is proposed at approximately 6,000+ s.f. Applicant should be encouraged to <br />install the pond with variable depths to encourage vegetation growth within the open water area <br />which is attractive to waterfowl. In no case should pond ever exceed 5 deptli. <br />Code Requirements <br />Code provides little direction as to alterations creating open water areas within designated wetlands. <br />Section 10.56, Subd. 16 (J) (5-a) lists specific functional qualities that all wetlands provide and <br />should retain as follows: