Ordinance 17-99 - Laserfiche WebLink

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Russell D. Melton June 14, 1999 Page 2 5. a drawing titled "Sketch and Description for: Robert Adamson & Marlin Hansen of: Division of part of Outlot B, Otter Lake Estates, and Part of Gov't Lots 6 & 7, Section 36, T31, R22, Anoka County, Minnesota" prepared by E. G. Rud & Sons, Inc., Land Surveyors dated 4-3-91; 6. a drawing titled "Preliminary Plat and Grading Plan of: Oak Brook Peninsula" prepared by E. G. Rud & Sons, Inc., Land Surveyors, originally dated 12-11- 89, revised and dated 2-12-90 and 2-27-90; 7. a copy of a drawing showing the boundaries of your lot and the drainage easement (title and date of drawing not included on the copy); 8. copies of photographs of the site prior to construction of the hockey rink; and 9. an affidavit of Robert Adamson dated June 10, 1999. In addition to examination of the above referenced documents I visited the site on June 12, 1999 and visually examined the hockey rink construction and the surrounding area. I observed that approximately 35 feet of the perimeter of the northwest end of the hockey rink had been filled to a maximum depth of approximately 12 inches above the original grade and the southeast end of the rink had been cut to a maximum depth of approximately 6 inches below the original grade. You informed me that all of the fill I observed at the northwest end of the rink had been obtained from excavation of the southeast end and replacement for fill used in the swale. The fill placed in the northwest end of the rink is within the drainage easement described on the drawings and it appears that most of the fill removed from the southeast end is outside of the drainage easement. I have estimated the amount of fill removed from the southeast end and placed in the northwest end to be between 1.5 and 2 cubic yards (Le. 40 to 60 cubic feet). The area of the area of the drainage easement appears to be approximately 25000 square feet. Forty to sixty cubic feet of fill placed within a drainage area of 25000 square feet will have a negligible effect on the capacity of the drainage area to store flood waters. Furthermore, the fill placed within the drainage easement is balanced by fill removed from an area immediately adjacent to the drainage easement. Therefore, the net effect on the storage capacity of the drainage easement is zero.