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3. OFFSITE ANALYSIS <br /> A site reconnaissance was performed by Andrew L. Dawson, on July 10, 2007, to <br /> verify the downstream flow paths and observe any drainage problems downstream of the <br /> site. The weather varied between sunny with wind and overcast with a temperature of <br /> around 60 degrees. <br /> The project site is currently developed with one single-family home, a gravel <br /> driveway, a shop, and a garage. No visible on-site drainage problems were observed at <br /> the time of field investigations. <br /> Upstream Analysis <br /> Based on the site reconnaissance and the topographic survey of the area,the <br /> upstream flows entering the property are very minimal. <br /> Downstream Analysis <br /> Please refer to the Downstream Analysis Map on the next page for a detailed <br /> description of the downstream flow. <br /> The majority of drainage from the site sheet flows to the north, offsite. From <br /> there,the drainage flows north approximately 300ft into a large open channel system. <br /> The drainage then meanders to the east into a 24" corrugated HDPE culvert that runs east <br /> under 19th Ave SE(SR527). The drainage discharges out into a large existing detention <br /> pond on the east side of 19th Ave SE. The visual downstream was concluded at this point. <br /> There did not appear to be any restrictions or erosion problems within 'A mile of <br /> the site. <br />