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Home My WebLink AboutSDP201300052 Assessment - Environmental 2013-10-09 • ALBEMARLE NELSON FLLNANNA Thomas Jefferson Soil and Water Conservation District 706 Forest St, Ste G Charlottesville, VA 22903 975-0224 October 9, 2013 TO: Andy Sorrell Planning Department RE: Soils Report for: Ragged Mt. Farm — AT&T - % A t' 4174) Soil Map—Albemarle County,Virginia (Ragged Mt -AT&T) '.•,''', 708290 708320 708350 708380 708410 708440 38°0'36'N i way ._ :I s v • • • .4 s c _•"• 36C# +1., * �.o zp .,' 36D •` ,. 2 I Y i ,, 1 56C g Ai.," Hobbit•HI �� a `4 *At.... 4D 14' . . / -,.. y o j B . i', / p • y° '•-360). 0 • N a. • A yQ 38°0'25'N - 38°0'25"N 708230 708260 708290 708320 708350 708380 708410 708440 3 3 M Map Srala,1.1,520 if printed on A portrait(8.5"x 11")sheet Meters N 0 20 40 80 120 k AFeet 0 50 100 200 300 Map prod:Web Mercator Corner mordinates'WGS84 Edge tics.UTM Zone 17N WGS84 USDATDA Natural Resources Web Soil Survey 10/10/2013 Conservation Service National Cooperative Soil Survey Page 1 of 3 Soil Map—Albemarle County,Virginia (Ragged Mt-AT&T) MAP LEGEND MAP INFORMATION Area or Interest(AOI) Spoil Area The soil surveys that comprise your AOI were mapped at 1 15,800 Area of Interest(AOI) Stony Spot Soils Warning Soil Map may not be valid at this scale co Very Stony Spot Enlargement mapsmapping[] Soil Map Unit Polygons g ment of beyond the scale of ma in can cause Wet Spot misunderstanding of the detail of mapping and accuracy of soil line Soil Map Unit Lines placement.The maps do not show the small areas of contrasting Other soils that could have been shown at a more detailed scale • Soil Map Unit Points Special Line Features Special Point Features Please rely on the bar scale on each map sheet for map (o) Blowout Water Features measurements Streams and Canals ® Borrow Pit Source of Map Natural Resources Conservation Service Transportation Web Soil Survey URL http//websoilsurvey nrcs usda gov X Clay Spot «i-F Rails Coordinate System Web Mercator(EPSG 3857) (j Closed Depression �y Interstate Highways Maps from the Web Soil Survey are based on the Web Mercator • Gravel Pa US Routes projection,which preserves direction and shape but distorts Gravelly Spot distance and area A projection that preserves area,such as the •• Major Roads Albers equal-area conic projection,should be used if more accurate Landfill Local Roads calculations of distance or area are required ® A. Lava Flow Background This product is generated from the USDA-NRCS certified data as of 4k, Marsh or swamp . Aenal Photography the version date(s)listed below • Mine or Quarry Soil Survey Area Albemarle County,Virginia Survey Area Data Version 9,Jan 20,2010 O Miscellaneous Water Soil map units are labeled(as space allows)for map scales 1 50,000 a Perennial Water or larger Rock Outcrop Date(s)aenal images were photographed May 10,2010—Jun 4, 2011+ Saline Spot Sandy Spot The orthophoto or other base map on which the soil lines were • compiled and digitized probably differs from the background 44. Severely Eroded Spot imagery displayed on these maps As a result,some minor shifting of map unit boundaries may be evident O Sinkhole :;.. Slide or Slip • Sodic Spot I SDA Natural Resources Web Soil Survey 10/10/2013 r Conservation Service National Cooperative Soil Survey Page 2 of 3 Soil Map—Albemarle County,Virginia Ragged Mt.-AT&T Map Unit Legend Albemarle County,Virginia(VA003) Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 4D Ashe loam,15 to 25 percent 2.2 30 3% slopes 7B Braddock loam,2 to 7 percent 0.5 6 9% slopes 36C Hayesville loam,7 to 15 percent 0.5 7 2% slopes 36D Hayesville loam,15 to 25 1.9 26.1% percent slopes 56B Meadowville loam,2 to 7 1.1 14.5% percent slopes 56C Meadowville loam,7 to 15 1.1 14.9% percent slopes Totals for Area of Interest 7.4 100.0% USDA Natural Resources Web Soil Survey 10/10/2013 Conservation Service National Cooperative Soil Survey Page 3 of 3 Ragged Mt - AT&T g � Negendmsonma+�,9. \ 1\‘ !637 OC)S C / ( p may not appear m legend) w ,\, L tt l S---.-N. 13 .,..„,,,,,v,\ /i.,,,,,,- 1 \o„:-1 0 init-c -.1-S L,:,==,!T"--" P)*N4'4'(OA '''' '....\C) <14— 'C I 13 OA°`'1 ,..c' Nq:''\' \___ ,....i----- \\,.,t.,,oj--j------ .„.„ . ..... ......., \ „., TAY IO /)1ROcKs r .A".-,.c,A' 2,3a-Tr— „ \ - ,— j� .,,, 7 .....,_ ✓ f��RETRIE TM:73 }'d j�� 01' "'AC:74 / Oq• '': NN i It,- ''' 4 1yl1) ‹ otVVVVAty Mq . . . All --------/lk 1\l'"?' ' y0E M�,� (�QQ 1 7os TM:, TM:88 A 1 "'.C1/ 1 2014 ft ,0ta,.Q� f Gc Web ,) {/ � _ Geographic Data Services (� 1 www.albemarle.org K � / J ` `:`'� A .-', \/1/ . �. 434)296-5e32 Mao is/or Display Purposes Only•Aerial Imagery from the Commonwealth of Virginia antl Other Sources October 10 2013 Roads and Streets,Shallow Excavations,and Lawns and Landscaping--Albemarle County, Ragged Mt.-AT&T Virginia Roads and Streets, Shallow Excavations, and Lawns and Landscaping Soil properties influence the development of building sites, including the selection of the site,the design of the structure,construction,performance after construction, and maintenance.This table shows the degree and kind of soil limitations that affect local roads and streets, shallow excavations, and lawns and landscaping. The ratings in the table are both verbal and numerical. Rating class terms indicate the extent to which the soils are limited by all of the soil features that affect building site development. Not limited indicates that the soil has features that are very favorable for the specified use. Good performance and very low maintenance can be expected. Somewhat limited indicates that the soil has features that are moderately favorable for the specified use. The limitations can be overcome or minimized by special planning, design, or installation. Fair performance and moderate maintenance can be expected. Very limited indicates that the soil has one or more features that are unfavorable for the specified use. The limitations generally cannot be overcome without major soil reclamation, special design, or expensive installation procedures. Poor performance and high maintenance can be expected. Numerical ratings in the table indicate the severity of individual limitations. The ratings are shown as decimal fractions ranging from 0.01 to 1.00. They indicate gradations between the point at which a soil feature has the greatest negative impact on the use (1.00) and the point at which the soil feature is not a limitation (0.00). Local roads and streets have an all-weather surface and carry automobile and light truck traffic all year.They have a subgrade of cut or fill soil material;a base of gravel, crushed rock, or soil material stabilized by lime or cement; and a surface of flexible material(asphalt), rigid material (concrete), or gravel with a binder.The ratings are based on the soil properties that affect the ease of excavation and grading and the traffic-supporting capacity.The properties that affect the ease of excavation and grading are depth to bedrock or a cemented pan, hardness of bedrock or a cemented pan, depth to a water table, ponding, flooding, the amount of large stones, and slope. The properties that affect the traffic-supporting capacity are soil strength (as inferred from the AASHTO group index number), subsidence, linear extensibility(shrink-swell potential), the potential for frost action, depth to a water table, and ponding. Shallow excavations are trenches or holes dug to a maximum depth of 5 or 6 feet for graves, utility lines, open ditches, or other purposes. The ratings are based on the soil properties that influence the ease of digging and the resistance to sloughing. Depth to bedrock or a cemented pan, hardness of bedrock or a cemented pan,the amount of large stones, and dense layers influence the ease of digging,filling, and compacting. Depth to the seasonal high water table, flooding, and ponding may restrict the period when excavations can be made. Slope influences the ease of using machinery. Soil texture, depth to the water table, and linear extensibility (shrink-swell potential) influence the resistance to sloughing. USDA Natural Resources Web Soil Survey 10/10/2013 Conservation Service National Cooperative Soil Survey Page 1 of 4 Roads and Streets,Shallow Excavations,and Lawns and Landscaping---Albemarle County, Ragged Mt.-AT&T Virginia Lawns and landscaping require soils on which turf and ornamental trees and shrubs can be established and maintained. Irrigation is not considered in the ratings. The ratings are based on the soil properties that affect plant growth and trafficability after vegetation is established.The properties that affect plant growth are reaction; depth to a water table; ponding; depth to bedrock or a cemented pan;the available water capacity in the upper 40 inches; the content of salts, sodium, or calcium carbonate; and sulfidic materials. The properties that affect trafficability are flooding,depth to a water table, ponding,slope,stoniness, and the amount of sand, clay, or organic matter in the surface layer. Information in this table is intended for land use planning, for evaluating land use alternatives, and for planning site investigations prior to design and construction. The information, however, has limitations. For example, estimates and other data generally apply only to that part of the soil between the surface and a depth of 5 to 7 feet. Because of the map scale, small areas of different soils may be included within the mapped areas of a specific soil. The information is not site specific and does not eliminate the need for onsite investigation of the soils or for testing and analysis by personnel experienced in the design and construction of engineering works. Government ordinances and regulations that restrict certain land uses or impose specific design criteria were not considered in preparing the information in this table. Local ordinances and regulations should be considered in planning, in site selection, and in design. Report—Roads and Streets, Shallow Excavations, and Lawns and Landscaping [Onsite investigation may be needed to validate the interpretations in this table and to confirm the identity of the soil on a given site.The numbers in the value columns range from 0.01 to 1.00. The larger the value, the greater the potential limitation. The table shows only the top five limitations for any given soil. The soil may have additional limitations] Roads and Streets,Shallow Excavations,and Lawns and Landscaping—Albemarle County,Virginia Map symbol and soil Pct.of Local roads and streets Shallow excavations Lawns and landscaping name map unit Rating class and Value Rating class and Value Rating class and Value limiting features limiting features limiting features 4D—Ashe loam, 15 to 25 percent slopes Ashe 80 Very limited Very limited Very limited Slope 1.00 Depth to hard bedrock 1.00 Slope 1 00 Depth to hard bedrock 0 90 Slope 1.00 Depth to bedrock 0.90 Frost action 0.50 Cutbanks cave 0.10 Droughty 0.32 t.SDA Natural Resources Web Soil Survey 10/10/2013 ""'om Conservation Service National Cooperative Soil Survey Page 2 of 4 Roads and Streets,Shallow Excavations,and Lawns and Landscaping---Albemarle County, Ragged Mt.-AT&T Virginia Roads and Streets,Shallow Excavations,and Lawns and Landscaping—Albemarle County,Virginia Map symbol and soil Pct.of Local roads and streets Shallow excavations Lawns and landscaping name map unit Rating class and Value Rating class and Value Rating class and Value limiting features limiting features limiting features 7B—Braddock loam,2 to 7 percent slopes Braddock 80 Very limited Somewhat limited Not limited Low strength 1.00 Too clayey 0.13 Shrink-swell 0.50 Cutbanks cave 0.10 Frost action 0 50 36C—Hayesville loam,7 to 15 percent slopes Hayesville 80 Somewhat limited Somewhat limited Somewhat limited Frost action 0 50 Slope 0 37 Slope 0.37 Slope 0.37 Cutbanks cave 0.10 Low strength 0.08 36D—Hayesville loam, 15 to 25 percent slopes Hayesville 80 Very limited Very limited Very limited Slope 1.00 Slope 1 00 Slope 1.00 Frost action 0.50 Cutbanks cave 0.10 Low strength 0.08 56B—Meadowville loam,2 to 7 percent slopes Meadowville 75 Very limited Somewhat limited Not limited Low strength 1.00 Depth to saturated 0.61 zone Shnnk-swell 0.50 Cutbanks cave 0.10 Frost action 0.50 56C—Meadowvile loam,7 to 15 percent slopes Meadowville 80 Very limited Somewhat limited Somewhat limited Low strength 1 00 Depth to saturated 0.61 Slope 0.37 zone Shnnk-swell 0.50 Slope 0.37 Frost action 0.50 Cutbanks cave 0 10 Slope 0 37 LSU.\ Natural Resources Web Soil Survey 10/10/2013 go" Conservation Service National Cooperative Soil Survey Page 3 of 4 Roads and Streets,Shallow Excavations,and Lawns and Landscaping--Albemarle County, Ragged Mt.-AT&T Virginia Data Source Information Soil Survey Area: Albemarle County,Virginia Survey Area Data: Version 9, Jan 20, 2010 USDA Natural Resources Web Soil Survey 10/10/2013 -ma" Conservation Service National Cooperative Soil Survey Page 4 of 4 • Physical Soil Properties—Albemarle County,Virginia Ragged Mt.-AT&T Report—Physical Soil Properties Physical Soil Properties-Albemarle County,Virginia Map symbol Depth Sand Silt Clay Moist Saturated Available Linear Organic Erosion Wind Wind and soil name bulk hydraulic water extensibility matter factors erodibility erodibility density conductivity capacity group index Kw Kf T In Pct Pct Pct g/cc micro m/sec In/In Pct Pct 4D—Ashe loam,15 to 25 percent slopes Ashe 0-10 -45- -42- 7-14-20 1 35-1 60 14 00-42 00 0 13-0 18 0 0-2 9 1 0-5 0 24 24 2 5 56 10-19 -45- -42- 7-14-20 1.35-1 60 14 00-42 00 0 10-0 14 0 0-2 9 0 0-1 0 .24 .32 19-24 -67- -23- 5-10-15 1.45-1 65 14 00-42 00 0 08-012 0 0-2 9 0 0-1 0 .17 .17 24-79 — — — — 0 00-42 00 — — — 78—Braddock loam,2 to 7 percent slopes Braddock 0-8 -43- -40- 10-18-25 1.20-1.50 4 00-42.00 0 14-0 19 0 0-2 9 1 0-2 0 32 32 4 8 0 8-79 -26- -29- 35-45-55 1 20-1 50 4 00-14 00 0 12-0 17 3 0.5 9 0 0-0.5 .24 .28 36C— Hayesville loam,7 to 15 percent slopes Hayesvlle 0-7 -43- -40- 10-18-25 1.35-1.60 14 00-42 00 012-0 20 0 0-2 9 1 0-3 0 20 20 5 5 56 7-58 -30- -30- 30-40-50 1 20-1 35 4 00-14 00 015-0 20 0 0-2.9 0 5-1 0 24 24 58-67 -56- -15- 20-30-40 1 30-1 40 4 00-14 00 012-0 20 0 0.2 9 0 0-0 5 20 20 67-83 -69- -16- 5-15-25 1 45-1.65 14 00-42 00 0 11-0 15 0 0-2 9 0 0-0 5 17 17 USDA Natural Resources Web Soil Survey 1 011 0/2 01 3 Conservation Service National Cooperative Soil Survey Page 4 of 6 Physical Soil Properties—Albemarle County,Virginia Ragged Mt.-AT&T Physical Soil Properties-Albemarle County,Virginia Map symbol Depth Sand Sitt Clay Moist Saturated Available Linear Organic Erosion Wind Wind and soil name bulk hydraulic water extensibility matter factors erodibility erodibility density conductivity capacity group index Kw Kf T In Pct Pct Pct g/cc micro m/sec In/In Pct Act 36D— Hayesville loam,15 to 25 percent slopes Hayesville 0-7 -43- -40- 10-18-25 1 35-1 60 14 00-42 00 012-0 20 0 0-2 9 1 0-3 0 20 20 5 5 56 7-58 -30- -30- 30-40-50 1 20-1 35 4 00-14 00 015-0 20 0 0-2 9 0 5-1 0 24 24 58-67 -56- -15- 2030-40 1 30-1 40 4.00-14.00 0.12-0.20 0 0-2 9 0 0-0 5 20 20 67-83 -69- -16- 5-15-25 1.45-1 65 14.00.42 00 0 11-0 15 0 0-2 9 0 0-0 5 .17 .17 568— Meadowville loam,2 to 7 percent slopes Meadowville 0-14 -43- -39- 10-19-27 1 00-1.25 14.00-42.00 017-0 20 0 0-2 9 2 0-4 0 .37 .37 3 6 48 14-48 -37- -37- 20-26-35 1 20-1 50 4 00-42 00 0 14-0 19 3 0-5 9 0.0-0.5 28 28 46-79 -33- -47- 7-20-27 1 20-1 50 4 00-42 00 0 11-0 17 3 0-5 9 0.0-0 5 28 28 56C— Meadowville loam,7 to 15 percent slopes Meadowville 0-14 -43- -39- 10-19-27 1 00-1 25 14 00-42 00 017-0.20 0 0-2 9 2 0-4 0 37 37 3 6 48 14-46 -37- -37- 20-26-35 1 20-1 50 4.00-42.00 0 14-0 19 3 0-5 9 0 0-0 5 .28 .28 46-79 -33- -47- 7-20-27 1.20-1 50 4 00-42 00 0 11-0 17 3 0-5 9 0.0-0 5 28 28 USDA Natural Resources Web Soil Survey 10/10/2013 Conservation Service National Cooperative Soil Survey Page 5 of 6 Soil Features—Albemarle County,Virginia Ragged Mt.-AT&T Report—Soil Features Soil Features-Albemarle County,Virginia Map symbol and Restrictive Layer Subsidence Potential for frost Risk of corrosion soil name action Kind Depth to Thickness Hardness Initial Total Uncoated steel Concrete top In In In In 4D—Ashe loam,15 to 25 percent slopes Ashe Ldhic bedrock 20-40 — Very strongly — — Moderate Low High cemented 7B—Braddock loam,2 to 7 percent slopes Braddock — — — — Moderate High Moderate 36C—Hayesville loam,7 to 15 percent slopes Hayesville — — — — Moderate Moderate Moderate 36D—Hayesville loam,15 to 25 percent slopes Hayesville — — — — Moderate Moderate Moderate 56B—Meadowville loam,2 to 7 percent slopes Meadowville — — — — Moderate High High 56C—Meadowville loam,7 to 15 percent slopes Meadowville — — — — Moderate High High gillNatural Resources Web Soil Survey 10/10/2013 �ll� Conservation Service National Cooperative Soil Survey Page 2 of 3 Soil Features—Albemarle County,Virginia Ragged Mt -AT&T Soil Features This table gives estimates of various soil features. The estimates are used in land use planning that involves engineering considerations. A restrictive layer is a nearly continuous layer that has one or more physical, chemical, or thermal properties that significantly impede the movement of water and air through the soil or that restrict roots or otherwise provide an unfavorable root environment. Examples are bedrock, cemented layers, dense layers, and frozen layers.The table indicates the hardness and thickness of the restrictive layer, both of which significantly affect the ease of excavation. Depth to top is the vertical distance from the soil surface to the upper boundary of the restrictive layer. Subsidence is the settlement of organic soils or of saturated mineral soils of very low density. Subsidence generally 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.The table shows the expected initial subsidence,which usually is a result of drainage,and total subsidence,which results from a combination of factors. Potential for 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, saturated hydraulic conductivity(Ksat), 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 to pavements and other rigid structures. Risk of corrosion pertains to potential soil-induced electrochemical or chemical action that corrodes 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 results in a severe hazard of corrosion. The steel or concrete in installations that intersect soil boundaries or soil layers is more susceptible to corrosion than the steel or concrete 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 also is expressed as low, moderate, or high. It is based on soil texture, acidity, and amount of sulfates in the saturation extract. USDA Natural Resources Web Soil Survey 10/10/2013 Conservation Service National Cooperative Soil Survey Page 1 of 3