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Ms. Katie Larsen <br />11 /6/2024 <br />Page 3 <br />The highpoint on the east side at the front of Lot 4 would become the <br />secondary EOF for the existing basin to the east when inundated. <br />(Plowe 10/15//24) Noted <br />(WSB 11/6/24) Previous 908.7 EOF acted as a secondary EOF for the <br />adjacent developments to the east and west and must be maintained <br />(Basin to the east is 'land -locked' and will ultimately flow back to the west). <br />1 Areas along the side property line can be filled to improve <br />drainage swales but the 908.7 EOF must be maintained <br />2 Adjacent grading should be contained to drainage and <br />utility easements <br />3 Grading on adjacent property must be coordinated and <br />approved by the adjacent property owner <br />4 Provide written documentation to the City prior to <br />construction <br />• (WSB 11/6/24) The Lowest Opening Elevation (LOE) of Lots 2 and 3 must <br />be at least 910.7 to maintain minimum freeboard with the EOF (908.7) <br />1 The Lowest Floor elevation must be a minimum 909.4 <br />(SELO) <br />• Stormwater Management <br />Stormwater management for the site consists of a small read yard depression. However, <br />based on site layout, stormwater management is not required under City ordinance. <br />Comments on the proposed stormwater design are offered below. <br />Pre- and Post- Development Discharge Rates (cfs) <br />Condition <br />2-Year <br />10-Year <br />100-Year <br />10-Day Snowmelt <br />Existing <br />0.62 <br />1.70 <br />4.17 <br />Not required <br />Proposed <br />1.27 <br />2.80 <br />6.43 <br />Not required <br />2. Sufficient freeboard is available between the depression modeled HWL and <br />the proposed household low floors/low entries. <br />Spargur Estates Engineering Review <br />