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CITY of ORONO Post Ofti' Box 66•Crystal Bay,Minnesota 55323•Municipal Offices On the North Shore of Lake Minnetonka • May 29, 1984 82 , , Mr. John Dugan 2785 White Oak Circle Long Lake, Minnesota 55356 Re: Drainage Problem Dear Mr. Dugan: I reviewed your drainage situation with Glenn Cook, City Engineer, and John Gerhardson, Public Works Coordinator. Mr. Gerhardson informed me that the grading work done at 425 South Old Crystal Bay Road had been maintenance of the existing drainageway and did not require a permit. Our 1971 file air photos indicate the area was not a retention basin then, which bears out the fact that this is an historic drainageway. Mr Cook indicated that in his opinion, the grading in itself, would likely not have the effect of signifi- cantly increasing the volume or velocity of flow through the culvert onto ycur property. A topographic investigation of the watershed draining through your property indicates it is roughly 17 acres in area. The relatively steep slopes and clayey soils throughout this area would tend to create a naturally speedy runoff. Both Glenn and John were of the opinion, and I concur, that the ponding effect you are getting is most likely a result of the "trapped" basin behind your house. The water level has to raise to a certain level before it overflows across into Marier 's property and to the southeast. There may be an old agricultural drain tile in this low spot that has plugged up or broken, which could also be slowing the drainage. We know there was a 12" diameter (approximately) draintile found during construction of the home at the end of White Oak Circle. A tile system may indeed extend into your property. Air photos show this property has been under cultivation previously. am afraid I do not have a quick and easy solution for your ponding problem. You might consiuer creating a swale across the hump between your property and Marier 's so that water does not stand in your back d. r do not know what effect this might have on Marier 's property ++\r^,-. J'1 'I'' • \I)t1I\ICIH%HO\A IIVAK('1 4/171tM • 1'1 RI I( NO14 1'I •)cv