Agenda - Council - 10/27/2015 - Laserfiche WebLink

Home

IV. LAND AND WATER RESOURCES INVENTORY Each plan must contain an inventory of water resource and physical factors affecting the water resources based on existing records and publications. If data publications and maps are available at a convenient central location, they may be included by reference. The plan must include a brief summary of the data and must identify where the publication can be obtained. The following subsections are required. A. Precipitation The state climatology office has records of all official rain gauges throughout Anoka County. The monthly precipitation totals and county -wide monthly averages for Anoka County are available online at: httn://climate.umn.edu/HIDENannual/ The two closest high -density rain gauges are: 1. No. 211785, Coon Creek 2. No. 217308, Saint Francis Information is readily available from 1971 to the present. Over this time period, the aggregate annual precipitation ranged as follows: Lowest annual precipitation 16.5 inches in 1976 Highest Annual Precipitation 39.09 inches in 1983 Average Annual Precipitation 29.54 inches per year The following is the average annual precipitation per decade: 1970s 26.8 inches per year 1980s 29.9 inches per year 1990s 31.2 inches per year 2000s 29.6 inches per year 2010s29.2 inches per year On the average, June is the wettest month, followed by July and May. B. General Geology and Topographic Data The City of Ramsey is nestled between the Rum and Mississippi Rivers and within 2 miles of the confluence of these rivers. The general terrain is relatively flat and is often called the Anoka Sand Plain. The elevations range from approximate elevation 920 feet above mean seal level in northwestern Ramsey to near 840 feet at the lower Rum River. The straight-line distance between these points is approximately 60,000 feet, making the average slope less than 1 percent. In general, the land slope is in the 2 to 5 percent range. Section IV October 21, 2015 Page 13