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HomeMy WebLinkAboutZMA200100021 Study 2002-02-25 Thomas Jefferson Soil and Water Conservation District February 25, 2002 2134 Berkmar Dr Charlottesville, VA 22901 975-0224 TO: Elaine Echols Planning Department RE: Soils Report for: Carriage Gate Apts (V-zprivci-MwalL igzg /76/17 � � / 390 2713 ' , 4.011 y43 94C F•65C I 1 / 34 5C 48E 94C \ ao947D \Oh' '-1.A��� 391 % 1/ip N C 34114r, 83 / 1C dil as+ i / p�', I 658 r A � 65c v . . 4 /, di 10 '� y 1 47 E pis/ it‘ `�90 �qB48E / 47D �`, �39D •27C3a �� 65C � ' 656 ac 27D a7E 39D a r/ el r s •rook 65C `Q \ 27C �9aC 39E ', p, ❑ Al" • 1J` 48E rn 39D ��ry%�� 34D \ 16 di. 340 �� 47D gs \ 27C G tt ve- V65B .. 276 27C .! 1 93E 501 65 1ORS \ 17") 270 340 •.` i 65C 27C �.. y `yt 93E "IC 86B ©P - 47D ?/.ALS--- 1.4: ;�, 930 Mill© 4111orpo- 7, �Ot),c 4� o jiff/• , 1� 34c ,40O 65C 340 48E m � , 27C 2713_ 27C 27C `\ 470 0� 34D stm• elan• \ ` � -� V 39D 34C 27B (\ S 3.4C 4E IIIIIII& -- 28C3poO /1.- v 1110 93E 93C Z \ 65C iraly/ !, -- 34D4340 65C Vip ,,,,, 276 34D �I� 27C /� 34D 27C 88 94C',,- \ ,/ U7/39D 278 • , illib 'S) r 34C 65C 4. \ 27C ' 27Bforiill IL Northfields 968 Ottn Ridg CCCb�s1Af/ �6� p� i 0_ _ ` O'56B 5 • iii) it, J 276 276 I/ 3 94B „ v o0 3 r. 9AC'. 19B pG/ 3� 4 IF _ 4411" r• 0 196 L `' \ 47D o0 91 ,b / Idersgate 656 �, G �Chur • �95 - \ b :L o0 22C3 �39D 104 1,c r ... �� � 19C 276 00 27c 1 2003 / 2C 39D �G PS o� 27B , 27C 1 / y� Berkley M tI� i nog o,, . / \\ - 278 ill \ t, ti 39D / 10411 20133 2C - 30 IL Holy Comfor � l9B � y School AD � ‘ 3 91 39D Sao '• .kefield 4 28 '39 / I \ 198 , f ' D I 39 91 (b' 2G it 39D / 27B 27B •\ 216 ote�, n� ry 56B 27 N 27C / 2C 95 50D 88 /•10• 39E' �i ) 21c , 28 P� � \ C o) /C'N / y NONTECHNICAL SOILS DESCRIPTION REPORT CARRIAGE GATE Map I Soil name and description Symbol 27B elioak loam, 2 to 7 percent slopes Elioak soils are dep and well drained. Permeability and available water capacity are moderate. Erosion hazard ranges from moderate to severe. The subsoil has moderate shrink-swell potential. The root zone extend to a depth of 40 inches. The organic matter content and the natural fertility are low. This soil is very strongly acid to medium acid throughout, but reaction in the surface layer is variable because of liming. Bedrock is generally at a depth of more than 5 feet. 27C elioak loam, 7 to 15 percent slopes Elioak soils are dep and well drained. Permeability and available water capacity are moderate. Erosion hazard ranges from moderate to severe. The subsoil has moderate shrink-swell potential. The root zone extend to a depth of 40 inches. The organic matter content and the natural fertility are low. This soil is very strongly acid to medium acid throughout, but reaction in the surface layer is variable because of liming. Bedrock is generally at a depth of more than 5 feet. 34B glenelg loam, 2 to 7 percent slopes Glenelg soils are deep, well drained soils. Permeability is moderate, and the available water capacity is high. Erosion hazard varies from moderate to severe. The subsoil has low shrink-swell potential. The root zone extends to a depth of 30 inches. The organic matter content is low to moderate, and natural fertility is low. This soil commonly is strongly acid or very strongly acid throughout, but reaction in the surface layer is variable because of local liming. Bedrock is generally at a depth of more than 60 inches. 34C glenelg loam, 7 to 15 percent slopes NONTECHNICAL SOILS DESCRIPTION REPORT CARRIAGE GATE Map I Soil name and description Symbol Glenelg soils are deep, well drained soils. Permeability is moderate, and the available water capacity is high. Erosion hazard varies from moderate to severe. The subsoil has low shrink-swell potential. The root zone extends to a depth of 30 inches. The organic matter content is low to moderate, and natural fertility is low. This soil commonly is strongly acid or very strongly acid throughout, but reaction in the surface layer is variable because of local liming. Bedrock is generally at a depth of more than 60 inches. 34D glenelg loam, 15 to 25 percent slopes Glenelg soils are deep, well drained soils. Permeability is moderate, and the available water capacity is high. Erosion hazard varies from moderate to severe. The subsoil has low shrink-swell potential. The root zone extends to a depth of 30 inches. The organic matter content is low to moderate, and natural fertility is low. This soil commonly is strongly acid or very strongly acid throughout, but reaction in the surface layer is variable because of local liming. Bedrock is generally at a depth of more than 60 inches. 65C pacolet sandy loam, 7 to 15 percent slopes Pacolet soils are deep and well drained. Permeability is moderate, and available water capacity is low. Erosion hazard varies from moderate to severe. The subsoil has low shrink-swell potential. The root zone extends to a depth of 30 inches or more. The organic matter content and natural fertility are low. This soil commonly is medium acid to very strongly acid, but reaction in the surface layer is variable because of local liming. Bedrock is generally at a depth of more than 4 feet. 28C3 elioak clay loam, 7 to 15 percent slopes, severely eroded NONTECHNICAL SOILS DESCRIPTION REPORT CARRIAGE GATE Map I Soil name and description Symbol Elioak soils are dep and well drained. Permeability and available water capacity are moderate. Erosion hazard ranges from moderate to severe. The subsoil has moderate shrink-swell potential. The root zone extend to a depth of 40 inches. The organic matter content and the natural fertility are low. This soil is very strongly acid to medium acid throughout, but reaction in the surface layer is variable because of liming. Bedrock is generally at a depth of more than 5 feet. 39D hazel loam, 15 to 25 percent slopes Hazel soils are deep excessively drained soils. Permeability is moderately rapid. Available water capacity is low. Surface runoff is rapid to very rapid. The hazard of erosion is severe to very severe.The subsoil has low shrink-swell potential. The root zone extends to a depth of 20 inches. The organic matter content and the natural fertility are low. This soil commonly is strongly acid or very strongly acid. Depth to bedrock ranges from 20 to 40 inches. U.S. DEPARTMENT OF AGRICULTURE PAGE 1 OF 2 NATURAL RESOURCES CONSERVATION SERVICE 03/7/02 SOIL FEATURES CARRIAGE GATE Bedrock I Cemented pan Subsidence I I Risk of corrosion I I I I Potential I Map symbol I I I I I I 'frost action' Uncoated I and soil name I Depth IHardnessl Depth I Kind IInitial l Total I I steel I Concrete I I I I I I I I In I I In I I In I In I I I I I I I I I I I 27B: I I I I I I I I I ELIOAK I >60 I --- I --- --- I --- I --- 'Moderate 'High 'Moderate I I I I I I I I I 27C: I I I I I I I I I ELIOAK I >60 I --- I --- I --- I --- I --- 'Moderate 'High 'Moderate I I I I I I I I I 34B: I I I I I I I I I GLENELG ' >60 I --- --- I --- I --- I --- 'Moderate 'Low IHigh I I I I I I I I 34C: I I I I I I I I I GLENELG >60 I --- --- I --- I --- I --- 'Moderate 'Low IHigh I I I I I I 34D: I I I I I I I I I GLENELG I >60 --- --- I --- I --- I --- 'Moderate 'Low (High I I I I I I I 65C: I I I I I I I I PACOLET >60 I --- I --- I --- I --- I --- --- IHigh 'High I I I I I I I I 28C3: ' I I I I I I I I ELIOAK ' >60 I --- I --- I --- I --- --- 'Moderate 'High 'Moderate I I I I I I I 39D: I I I I I I I I I HAZEL 20-40 I Hard I --- I --- I --- I --- 'Moderate 'Low IHigh I I I I I I I I I U.S. DEPARTMENT OF AGRICULTURE PAGE 2 OF 2 NATURAL RESOURCES CONSERVATION SERVICE 03/7/02 SOIL FEATURES Endnote -- SOIL FEATURES This report gives estimates of various soil features. The estimates are used in land use planning that involves engineering considerations. Depth to bedrock is given if bedrock is within a depth of 5 feet. The depth is based on many soil borings and on observations during soil mapping. The rock is either "Soft" or "Hard". If the rock is "Soft" or fractured, excavations can be made with trenching machines, backhoes, or small rippers. If the rock is "Hard" or massive, blasting or special equipment generally is needed for excavation. Cemented pans are cemented or indurated subsurface layers within a depth of 5 feet. Such pans cause difficulty in excavation. Pans are classified as "Thin" or "Thick". A "Thin" pan is less than 3 inches thick if continuously indurated or less than 18 inches thick if discontinuous or fractured. Excavations can be made by trenching machines, backhoes, or small rippers. A "Thick" pan is more than 3 inches thick if continuously indurated or more than 18 inches thick if discontinuous or fractured. Such a pan is so thick or massive that blasting or special equipment is needed in excavation. Subsidence is the settlement of organic soils or of saturated mineral soils of very low density. Subsidence results from either desiccation and shrinkage or oxidation of organic material, or both, following drainage. Subsidence takes place gradually, usually over a period of several years. This report shows the expected initial subsidence, which usually is a result of drainage, and total subsidence, which usually is a result of oxidation. Not shown in the report is subsidence caused by an imposed surface load or by the withdrawal of ground water throughout an extensive area as a result of lowering the water table. Potential frost action is the likelihood of upward or lateral expansion of the soil caused by the formation of segregated ice lenses (frost heave) and the subsequent collapse of the soil and loss of strength on thawing. Frost action occurs when moisture moves into the freezing zone of the soil. Temperature, texture, density, permeability, content of organic matter, and depth to the water table are the most important factors considered in evaluating the potential for frost action. It is assumed that the soil is not insulated by vegetation or snow and is not artificially drained. Silty and highly structured clayey soils that have a high water table in winter are the most susceptible to frost action. Well drained, very gravelly, or very sandy soils are the least susceptible. Frost heave and low soil strength during thawing cause damage mainly to pavements and other rigid structures. Risk of corrosion pertains to potential soil-induced electrochemical or chemical action that dissolves or weakens uncoated steel or concrete. The rate of corrosion of uncoated steel is related to such factors as soil moisture, particle-size distribution, acidity, and electrical conductivity of the soil. The rate of corrosion of concrete is based mainly on the sulfate and sodium content, texture, moisture content, and acidity of the soil. Special site examination and design may be needed if the combination of factors creates a severe corrosion environment. The steel installations that intersect soil boundaries or soil layers is more susceptible to corrosion than steel in installations that are entirely within one kind of soil or within one soil layer. For uncoated steel, the risk of corrosion, expressed as "Low", "Moderate", or "High", is based on soil drainage class, total acidity, electrical resistivity near field capacity, and electrical conductivity of the saturation extract. For concrete, the risk of corrosion is also expressed as "Low", "Moderate", or "High". It is based on soil texture, acidity, and amount of sulfates in the saturation extract.