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r I <br />TABI E 1 <br />NUTRIENT LOADING ACCORDING TO LAND USE <br />TABLE 3 <br />SOILS AND SLOPE DESCRIPTIONS <br />I • <br />Land Use <br />Nutrient Load <br />(pounds/acre/year) <br />Open Space 0.30 <br />ft <br />Residential; <br />lots larger than 1 acre <br />lots 1 acre or less <br />multiple dwellings <br />1 * • <br />' • <br />0.40 <br />1.44 <br />3.46 ' <br /># <br />1 <br />I ^ <br />Commercial/Industrial <br />• ' , * <br />•1.33 ' <br />Tight Soil A mixture of clay with sand, silt or clay, <br />0.2 to 0.6"/hr. permeability. Example: <br />• <br />Brickton silt loam. <br />. ■» ^ 1 ■ ' • <br />Medium Soil A glacial till, loams, sandy silts Or clays. <br />0.6 to 6"/hr. permeability. Example: Nessel <br />sandy loam. <br />0 • <br />Loose Soil Clean sands and gravels, greater than 6”/hr. <br />1 <br />permeability. Example: <br />4 Zimmerman fine sand. <br />TABLE 2 . <br />NUTRIENT ASSIMILATIVE CAPACITY OF WETLANDS <br />K <br />Steep Slope ■ 6% or more <br />. i . <br />4^ <br />. i <br />Wetland Type <br />w <br />' . Cattail Marsh (continuously wet) <br />Grassy Marsh (alternately wet-dry) <br />Moderate <br />Slope <br />f • <br />2% to 6% <br />Assimilative Capacity <br />(pounds/acre/year)Flat Slope • 2% or jess i <br />4.0 <br />i <br />12.0 <br />< V <br />• •*.» ' ’ *» «•,# *• * i • * . ;.. j . •« * * <br />---------------------------r ..,v ' . • • . : •• • •• r 't : ■ <br />TABLE 4 - RUNOFF COEFFICIENTS (C) <br />• V—----^-------- <br />• f ^ 1 <br />•« <br />t « <br />•'9 ' <br />r */ • • * <br />« f <br />1 . <br />•• • • <br />• t* <br />Soil and Slope <br />•; Characteristics <br />*• i. • <br />* V <br />V.-‘ Steep Slope ' • <br />- Tight Soil \\) <br />Steep Slope * . <br />■ Medium ^il <br />‘ d ~ • * <br />. r. i, Steep Slope <br />•• Loose Soili • <br />I .* T <br />■ ‘ Moderate Slope <br />.' Tight Soil <br />‘ r.. . Moderate Slope <br />>* ./, >,• Medium Soil ' <br />. '•' Moderate Slope <br />■';>/Loose Soil ■ <br />‘‘'j, • • JV <br />.V. ' S' Flat Slope ^ <br />Tight Soil '.y, <br />•vVv’‘'''Flat Slope ’ <br />V . Medium Soil • <br />Flat Slope <br />Loose Soil <br />Land Use . * I <br />•. • • * '• * K <br />Residential ' 'r * ’ • <br />t <br />* • ft ^ <br />. * : <br />: ■ * <br />Open • •-. . : ; <br />Space .;Single Family Detached & Duplex 9 ^ , * * 4 *. Multiple Dwelling <br />1 •• <br />Greater thari 1-2 acre V4-1 acre / ’Less than N ■ <br />10 units/acre More <br />than 10 * <br />units/acre•2 acre lots lots lots acre lots or less . 1 <br />0.65 ;0.65 ; .0.70 V 0.70 , . ; .0.70 /. '•;0.75 . '•• • om • '■ ' ^ . <br />' ♦ ^ <br />4 <br />» 1 * * »* . . * • • <br />•• * 4 ? ( :0.60 V-;; <br />• 'i*- <br />a ‘ . ♦ <br />0.40 . <br />A <br />m <br />0.45 •;.•' <br />. <'% <br />* , ‘ ■ s <br />0.45 <br />1 <br />\ ’ . ' • * <br />.050 , <br />’ > S ' *. <br />• > .>: ; • <br />0.50 <br />.-.V V'. V- <br />0.75 •: <br />0.30 .0.30 . *«0.35 0.40 ■.,0.40 . •:. <br />f <br />0.50 .i/.,;0.70 ; , <br />• V » t •. . / ' <br />4 <br />4 , •’ » <br />0.50 .. -0.50 0.55 . •-0.60 ’0.60 .0.65 ' > :0.80 <br />0.35 <br />. . '«• # <br />0.40 ' <br />4 <br />0.40 ' • •0.45 .‘v 0.45 ’0.60 ■ >■ j ;.i.': ii# '* ft 9* <br />• • .N* ', •• ••>'. ,v:. <br />M 9 ‘ f• * • *1 .* \ : • , . <br />ft • <br />«•..-. <br />0.20 0.25 0.25 0.30 ■ ■0.35 0.45 ;0.65 <br />.• • • •, <br />• . ft •V.-. V'< *; •. * • '* , <br />ft4 <br />0.45 • . <br />f' <br />0.45 ' <br />• - ■ -v' • f <br />0.50 <br />i « k <br />• • . <br />0.50 .• ‘ <br />A . • f *, <br />• O'»‘ ‘ ^ A* <br />0.55 1. <br />.'»• . <br />0.65 0.75 • V <br />• , •♦ <br />’ « • <br />1. t <br />‘'' ’ <br />' * ‘ 4 <br />. • ■ V ■ <br />^4 M <br />« % <br />• :• *1* ■ », <br />0.30 « .0.35 * ‘ <br />• <br />0.35 ' <br />* 4 ft » <br />_ ^ <br />0.40 f • <br />A * #4 <br />• •• »' . ‘ . %. <br />0.45 <br />* 4 a A ^ <br />* 4 f ^ ft• . % ^ <br />0.55 <br />4 • t r <br />0.70 <br />4 * •0 <br />» « .mm *4. ' « <br />• a # <br />1 • <br />* •* <br />a 4 ■ e ■ a ** <br />i ' , i ■ <br />1 , ‘ •' <br />A ' . <br />* * »*% ^ » <br />0.15 0.20 <br />i • <br />0.20 •0.25 •0.30 • ; ,0.45 .0.60 ; <br />*1 • '* • 4 . .* * * %* » . '• <br />Non-. <br />Residential <br />Commercial <br />Industrial <br />0.90 <br />• / <br />t t •V- <br />0.85 ■ • • <br />.0.80 • <br />• • < <br />0.85 <br />2 * <br />' • <br />• $ <br />0.80 <br />4 <br />0.75 • . <br />•. • <br />0.80 . . • • <br />0.75 ■ <br />0.70 r <br />- 4 • <br />Rice Cfeek Wstcrshed District <br />• Administrative Office <br />Suite 177 • Arden Plaza <br />3585 Lexington Ave. North <br />Arden Hills, MN 55112 <br />(612)483 0634 <br />• » ; <br />• «• I <br />• "s <br />*^ V . ' • <br />. E. A. Hickok & Associates <br />Consulting Engineers <br />(612) 473 4224 <br />• ‘ Frank J. Murray <br />• V • Attorney <br />‘ . ; . (612)222-5549 <br />hf lltm «r A.t V-^I <br />10/1/81