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CCP 09-10-2001
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CCP 09-10-2001
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<br />I <br />I <br />, <br />I <br />I <br />I <br />I <br />I <br />I <br />.. <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />#' <br />I <br /> <br />9.7.01 <br /> <br />Soil characteristics are also considered when developing erosion control plans. <br />Special procedures for erosion and sediment control should be incorporated <br />into all construction projects. The erosion control handbook published by <br />Board of Water and Soils Resources (BWSR) includes recommended <br />management practices. The Minnesota Pollution Control Agency (MPCA) <br />published in 2000 a document titled Protecting Water Quality in Urban Areas, <br />Best Management Practices for Dealing with Storm Water Runoff from <br />Urban, Suburban and Developing Areas of Minnesota. which may be used for <br />reference or its replacement document when it is approved. This manual can <br />be found on the WEB at http://www.pca.state.mn.us/water/pubs/sw- <br />bmpmanual.html. The Ramsey County Soil Erosion and Sediment Control <br />Handbook (1989) may also be used for erosion protection guidance. <br /> <br />Precipitation <br /> <br />Climate within the Minneapolis-St. Paul metropolitan area is described as a <br />humid continental climate with moderate precipitation, wide daily temperature <br />variations, warm humid summers and cold winters. The total average annual <br />precipitation is approximately 29 inches. The average annual snowfall is <br />approximately 50 inches, which is equivalent to roughly five inches of water. <br />Rainfall data for the Minneapolis - St. Paul metropolitan area is shown in <br />Table 2. <br /> <br />Table 2 <br /> <br />Rainfall in Minneapolis - St. Paul Metropolitan Area <br />(inches) <br /> <br />Return 24-hour 12-hour 6-hour 3-hour 2-hour 1-hour 30 - 15. <br />Frequency minute minute <br />1-year 2.3 2.0 1.7 1.5 1.4 1.2 0.9 0.6 <br />2-year 2.8 2.4 2.1 1.7 1.7 1.4 1.1 0.7 <br />5-year 3.6 3.1 2.7 2.3 2.2 1.8 1.4 1.0 <br />10-year 4.2 3.7 3.1 2.6 2.5 2.1 1.7 1.3 <br />25-year 4.6 4.2 3.5 3.0 2.8 2.3 1.9 1.4 <br />50-year 5.3 4.6 4.0 3.4 3.1 2.7 2.1 1.5 <br />100-year 5.9 5.0 4.4 3.8 3.5 2.9 2.4 1.7 <br /> <br />The JOO-year, 24-hour rainfall and the average annual precipitation for the <br />State of Minnesota is shown in Figure 3. The table and figure indicate <br />climatological information found in the U.S. Department of Commerce, <br />Weather Bureau Technical Paper No. TP-40. Another good resource for <br />rainfall data is the Rainfall Frequency Atlas for the Midwest published by tbe <br />Midwestern Climate Center and Illinois State Water Survey. A table from this <br />resource can be seen in Appendix K. <br /> <br />City of Arden Hills. Minnesota <br />Local Water Resource Management Plan <br /> <br />A,ARDEN0101.00 <br />Page 11 <br />
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