08/19/86 Special Mtg - Laserfiche WebLink

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not had time to make a written report. He has worked out drainage calculations and is requesting that 1.66 acre feet of drainage capacity be provided. He has received the results of the soil borings and there are more than 25% Class I soils on Lot 4, Block 1. Commissioner Deemer stated that he feels 1.66 acre feet of drainage is not sufficient for this plat. Acting Chairman Zimmerman referred to the August 5, 1986 report from Suburban Engineering which reflects that the water table on Lot 4 of Block 2 could come up as far as 3.7 feet; there should be a 6' separation between house floor and highest water table recorded. The Commission proceeded to review the City Engineer's initial report dated July 31, 1986 and John Oliver and Associate's response to that report dated August 4, 1986. Commissioner Hendriksen noted that the drainage calcuations submitted by the developer state that the ponding area is capable of accumulating 11,000 cubic feet of water; 1.66 acre feet interprets to capability to accumulate 70,000+ square feet of water; plat is deficient by 60,000+ square feet even at the 1.66 acre feet requirement. Jeff Struvy - 8453 168th - There is a drainage problem in the area now; additional development will increase that problem. Motion by Commissioner Hendriksen and seconded by Commissioner Shumway to table Mr. Ken Johnson's request for preliminary plat approval of Autumn Heights Meadows until the point of water retention is clarified. Further Discussion: Commissioner Shumway requested a written report from the City Engineer. Commissioner Deemer noted that according to the letter from John Oliver and Associates dated August 5, 1986, Mr. Caswell wants to fulfill some preliminary plat requirements after preliminary approval and prior to final approval; P&Z does not get the opportunity to again review the plat after preliminary approval and would like to see all requirements addressed prior to preliminary approval. Commissioner Deemer stated that even if drainage retention was properly addressed, he would still vote no to preliminary plat approval based on the other plat deficiencies. Motion carried. Voting Yes: Acting Chairman Zimmerman, Commissioners Shumway, Deemer, Howell and Hendriksen. Voting No: None. Absent: Chairman Peterson and Commissioner LaDue. Some of the Commission members would like to see the radius of the curve in Nutria Street conform to City Code. Commission consensus was to react favorably to a request for variance to cul-de- sac length. Case #2: Request For Preliminary Plat Approval Of Stanhope River Hi%l$; Qa~e Of Ann Canis And Tom Skiba: Ms. Norris stated that additional information required regarding the plat was Page 2 of 3