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HomeMy WebLinkAboutWPO201900036 Correspondence 2019-06-03 30 Scale, LLC 871 Justin Drive,Palmyra,VA 22963 SC Ph.434.242.2866 �{ mike@30scale.com June 3, 2019 Mr. Frank Pohl, PE County Engineer County of Albemarle Department of Community Development 401 McIntire Road Charlottesville,VA 22902 RE: Sime Pond Maintenance Plan-VESCP—Variation Request to allow the use of a Mud Trap TMP 69B-46-Albemarle County,Virginia Dear Frank, Please find this letter and attachments our request to a variation to the Virginia Erosion and Sediment Control Handbook(VESCHB)to allow the use of mud traps in lieu of sediment traps to trap sediment-laden runoff at each side of the downstream toe of dam fill. The right side of the dam fill drains approximately 0.20 acres of area,while the left side drains approximately 0.10 acres. The space requirement of 67 CY/AC each for wet and dry storage for a sediment trap in these locations would not be practical as it would require overclearing and do more harm than good to the existing terrain. The mud traps,which consist of silt fencing with a stone outlet weir at the low point will provide adequate control of sediment. The contractor will need to monitor and clean the mudtrap of sediment throughout construction. A detail for the mud trap is provided on sheet 5 of the VESCP Plan,while maintenance guidelines are provided in the Erosion and Sediment Control Narrative on Sheet 6 of the VESCP Plan. We have used mud traps in other projects in Albemarle County with success where there was a similar need to provide non-intrusive sediment controls at both sides of the stream on a downstream fill. The most recent project was Whittington—Phase B,where mud traps were approved and provided adequate controls. We thank you for taking the time to review this request. Please feel free to call me at any time if you have any questions or would like additional information. Sincerely, • // • Michael,, -rs, P.E.,CFM Cc:Randy Hamm,Site Tech attachments Wage 1 Watershed Model Schematic Hydraflow Hydrographs Extension for AutoCAD®Civil 3D®2018 by Autodesk, Inc.v2018.3 SIME POND HYDROLOGY AND HYDRAULIC CALCULATIONS MAY 31, 2019 30 SCALE, LLC Legend MA: pAgin Description 1 SCS Runoff SIME POND OVERALL 2 Reservoir POND ROUTING Project: SIME POND HYDROLOGY.gpw Sunday, 06/2/2019 Hydraflow Table of Contents SIME POND HYDROLOGY.gpw Hydraflow Hydrographs Extension for AutoCAD®Civil 3D®2018 by Autodesk,Inc.v2018.3 Sunday,06/2/2019 Watershed Model Schematic 1 2 - Year Summary Report 2 Hydrograph Reports 3 Hydrograph No. 1, SCS Runoff, SIME POND OVERALL 3 TR-55 Tc Worksheet 4 Hydrograph No. 2, Reservoir, POND ROUTING 5 Pond Report - SIME POND 6 10 - Year Summary Report 7 Hydrograph Reports 8 Hydrograph No. 1, SCS Runoff, SIME POND OVERALL 8 Hydrograph No. 2, Reservoir, POND ROUTING 9 100 - Year Summary Report 10 Hydrograph Reports 11 Hydrograph No. 1, SCS Runoff, SIME POND OVERALL 11 Hydrograph No. 2, Reservoir, POND ROUTING 12 2 Hydrograph Summary Report Hydrographs Extension for AutoCAD®Civil 3D®2018 by Autodesk, Inc.v2018.3 Hyd. Hydrograph Peak Time Time to Hyd. Inflow Maximum Total Hydrograph No. type flow interval Peak volume hyd(s) elevation strge used Description (origin) (cfs) (min) (min) (cult) (ft) (cuft) 1 SCS Runoff 95.82 2 742 708,806 SIME POND OVERALL 2 Reservoir 68.76 2 764 702,053 1 497.08 120,976 POND ROUTING SIME POND HYDROLOGY.gpw Return Period: 2 Year Sunday, 06/2 /2019 3 Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD®Civil 3D®2018 by Autodesk,Inc.v2018.3 Sunday,06/2/2019 Hyd. No. 1 SIME POND OVERALL Hydrograph type = SCS Runoff Peak discharge = 95.82 cfs Storm frequency = 2 yrs Time to peak = 742 min Time interval = 2 min Hyd. volume = 708,806 cult Drainage area = 319.000 ac Curve number = 60 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 42.73 min Total precip. = 3.67 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 SIME POND OVERALL Q (cfs) Hyd. No. 1 --2 Year Q (cfs) 100.00 100.00 $ 90.00 90.00 80.00 80.00 70.00 70.00 60.00 60.00 50.00 - 50.00 40.00 40.00 30.00 30.00 20.00 20.00 10.00 10.00 0.00 - 1 - 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time(min) Hyd No. 1 4 TR55 Tc Worksheet Hydraflow Hydrographs Extension for AutoCAD®Civil 3D®2018 by Autodesk, Inc.v2018.3 Hyd. No. 1 SIME POND OVERALL Description A B C Totals Sheet Flow Manning's n-value = 0.240 0.011 0.011 Flow length (ft) = 300.0 0.0 0.0 Two-year 24-hr precip. (in) = 3.67 0.00 0.00 Land slope (%) = 3.00 0.00 0.00 Travel Time (min) = 27.29 + 0.00 + 0.00 = 27.29 Shallow Concentrated Flow Flow length (ft) = 454.00 0.00 0.00 Watercourse slope (%) = 24.00 0.00 0.00 Surface description = Unpaved Paved Paved Average velocity (Ws) =7.90 0.00 0.00 Travel Time (min) = 0.96 + 0.00 + 0.00 = 0.96 Channel Flow X sectional flow area (sqft) = 2.00 0.00 0.00 Wetted perimeter(ft) = 4.00 0.00 0.00 Channel slope (%) = 9.00 0.00 0.00 Manning's n-value = 0.050 0.015 0.015 Velocity (ft/s) =5.62 0.00 0.00 Flow length (ft) ({0})4883.0 0.0 0.0 Travel Time (min) = 14.48 + 0.00 + 0.00 = 14.48 Total Travel Time, Tc 42.73 min 5 Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD®Civil 3D®2018 by Autodesk,Inc.v2018.3 Sunday,06/2/2019 Hyd. No. 2 POND ROUTING Hydrograph type = Reservoir Peak discharge = 68.76 cfs Storm frequency = 2 yrs Time to peak = 764 min Time interval = 2 min Hyd. volume = 702,053 cuft Inflow hyd. No. = 1 - SIME POND OVERALL Max. Elevation = 497.08 ft Reservoir name = SIME POND Max. Storage = 120,976 cuft Storage Indication method used. POND ROUTING Q (cfs) Hyd. No. 2--2 Year Q (cfs) 100.00 100.00 90.00 90.00 80.00 80.00 70.00 70.00 60.00 60.00 50.00 50.00 40.00 40.00 30.00 30.00 20.00 20.00 10.00 10.00 0.00 - 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 1680 Time(min) Hyd No. 2 Hyd No. 1 Total storage used = 120,976 cuft Pond Report 6 Hydraflow Hydrographs Extension for AutoCAD®Civil 3D®2018 by Autodesk, Inc.v2018.3 Sunday,06/2/2019 Pond No. 1 - SIME POND Pond Data Contours-User-defined contour areas.Average end area method used for volume calculation. Begining Elevation=496.30 ft Stage/Storage Table Stage(ft) Elevation(ft) Contour area(sqft) Incr.Storage(cult) Total storage(cult) 0.00 496.30 152,318 0 0 1.70 498.00 158,990 264,612 264,612 3.70 500.00 166,921 325,911 590,523 5.20 501.50 178,982 259,427 849,950 Culvert/Orifice Structures Weir Structures USE AVERAGE CREST WIDTH [A] [B] [C] [PrfRsr] [A] [B] [C] [D] Rise(in) = 0.00 0.00 0.00 0.00 Crest Len(ft) # 30.00 0.00 0.00 0.00 Span(in) = 0.00 0.00 0.00 0.00 Crest El.(ft) = 496.30 0.00 0.00 0.00 No.Barrels = 0 0 0 0 Weir Coeff. = 3.33 3.33 3.33 3.33 Invert El.(ft) = 0.00 0.00 0.00 0.00 Weir Type = Rect --- --- --- Length(ft) = 0.00 0.00 0.00 0.00 Multi-Stage = No No No No Slope(%) = 0.00 0.00 0.00 n/a N-Value = .013 .013 .013 n/a Orifice Coeff. = 0.60 0.60 0.60 0.60 Exfil.(in/hr) = 0.000(by Contour) Multi-Stage = n/a No No No TW Elev.(ft) = 0.00 Note:Culvert/Orifice outflows are analyzed under inlet(ic)and outlet(oc)control. Weir risers checked for orifice conditions(ic)and submergence(s). Stage(ft) Stage/Discharge Elev(ft) 6.00 502.30 5.00 501.30 4.00 500.30 3.00 499.30 2.00 498.30 1.00 497.30 0.00 496.30 0.0 100.0 200.0 300.0 400.0 500.0 600.0 700.0 800.0 900.0 1000.0 1100.0 1200.0 Total Q Discharge(cfs) 7 Hydrograph Summary Report Hydrographs Extension for AutoCAD®Civil 3D®2018 by Autodesk, Inc.v2018.3 Hyd. Hydrograph Peak Time Time to Hyd. Inflow Maximum Total Hydrograph No. type flow interval Peak volume hyd(s) elevation strge used Description (origin) (cfs) (min) (min) (cult) (ft) (cuft) 1 SCS Runoff 332.02 2 740 1,902,683 SIME POND OVERALL 2 Reservoir 274.42 2 754 1,884,560 1 498.26 307,034 POND ROUTING SIME POND HYDROLOGY.gpw Return Period: 10 Year Sunday, 06/2/2019 8 Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD®Civil 3D®2018 by Autodesk, Inc.v2018.3 Sunday,06/2/2019 Hyd. No. 1 SIME POND OVERALL Hydrograph type = SCS Runoff Peak discharge = 332.02 cfs Storm frequency = 10 yrs Time to peak = 740 min Time interval = 2 min Hyd. volume = 1,902,683 cuft Drainage area = 319.000 ac Curve number = 60 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 42.73 min Total precip. = 5.54 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 SIME POND OVERALL Q(cfs) Hyd. No. 1 -- 10 Year Q(cfs) 350.00 350.00 300.00 300.00 250.00 250.00 200.00 200.00 150.00 150.00 100.00 100.00 50.00 50.00 0.00 — 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 1 Time(min) 9 Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD®Civil 3D®2018 by Autodesk,Inc.v2018.3 Sunday,06/2/2019 Hyd. No. 2 POND ROUTING Hydrograph type = Reservoir Peak discharge = 274.42 cfs Storm frequency = 10 yrs Time to peak = 754 min Time interval = 2 min Hyd. volume = 1,884,560 cuft Inflow hyd. No. = 1 - SIME POND OVERALL Max. Elevation = 498.26 ft Reservoir name = SIME POND Max. Storage = 307,034 cuft Storage Indication method used. POND ROUTING Q (cfs) Hyd. No. 2 -- 10 Year Q (cfs) 350.00 350.00 300.00 300.00 250.00 250.00 200.00 200.00 150.00 150.00 100.00 100.00 50.00 50.00 0.00 - 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time(min) Hyd No. 2 Hyd No. 1 Total storage used = 307,034 cuft 10 Hydrograph Summary Report Hydrographs Extension for AutoCAD®Civil 3D®2018 by Autodesk, Inc.v2018.3 Hyd. Hydrograph Peak Time Time to Hyd. Inflow Maximum Total Hydrograph No. type flow interval Peak volume hyd(s) elevation strge used Description (origin) (cfs) (min) (min) (cuft) (ft) (cuft) 1 SCS Runoff 934.83 2 740 4,895,223 SIME POND OVERALL 2 Reservoir 849.51 2 748 4,848,594 1 500.47 671,124 POND ROUTING SIME POND HYDROLOGY.gpw Return Period: 100 Year Sunday, 06/2/2019 11 Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD®Civil 3D®2018 by Autodesk,Inc.v2018.3 Sunday,06/2/2019 Hyd. No. 1 SIME POND OVERALL Hydrograph type = SCS Runoff Peak discharge = 934.83 cfs Storm frequency = 100 yrs Time to peak = 740 min Time interval = 2 min Hyd. volume = 4,895,223 cuft Drainage area = 319.000 ac Curve number = 60 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 42.73 min Total precip. = 9.11 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 SIME POND OVERALL Q (cfs) Hyd. No. 1 -- 100 Year Q (cfs) 938.00 938.00 804.00 804.00 670.00 670.00 536.00 536.00 402.00 402.00 268.00 268.00 134.00 134.00 0.00 - 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time(min) Hyd No. 1 12 Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD®Civil 3D®2018 by Autodesk,Inc.v2018.3 Sunday,06/2/2019 Hyd. No. 2 POND ROUTING Hydrograph type = Reservoir Peak discharge = 849.51 cfs Storm frequency = 100 yrs Time to peak = 748 min Time interval = 2 min Hyd. volume = 4,848,594 cuft Inflow hyd. No. = 1 - SIME POND OVERALL Max. Elevation = 500.47 ft Reservoir name = SIME POND Max. Storage = 671,124 cuft Storage indication method used. POND ROUTING Q (cfs) Hyd. No. 2-- 100 Year Q (cfs) 938.00 938.00 804.00 804.00 670.00 670.00 536.00 536.00 402.00 402.00 268.00 268.00 134.00 - 134.00 0.00 - 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time (min) Hyd No. 2 Hyd No. 1 Total storage used = 671,124 cuft _USDA United States A product of the National Custom Soil Resource iiiiiiii Department of Cooperative Soil Survey, Agriculture a joint effort of the United Report for \ RCS States Department of Agriculture and other A I be m a rl e Federal agencies, State Natural agencies including the Resources Agricultural Experiment County, Vi rg i n i a Conservation Stations, and local Service participants SIME POND • ,'� r N.,...., �!? q. w41, y._ti ` • nIF.. t c 60449 ' ' ,t: ...- ti� 4 ~ w .,, (...: 1* '. , ' • F4 ,, ,4,,_ , 7,- vs' . .. i _ ____ _ -' [1. ' , '" * a • U 2.000 ft . April 28, 2019 Preface Soil surveys contain information that affects land use planning in survey areas. They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers. Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment. Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions. The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations. Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/ portal/nrcs/main/soils/health/)and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center (https://offices.sc.egov.usda.gov/locator/app?agency=nres)or your NRCS State Soil Scientist(http://www.nres.usda.gov/wps/portal/nres/detail/soils/contactus/? cid=nres142p2_053951). Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. Information about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.)Persons with disabilities who require 2 alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800)795-3272 (voice)or(202)720-6382 (TDD). USDA is an equal opportunity provider and employer. 3 Contents ����0���� �� �� s Preface 2 How Soil Surveys Are Made 5 Soil Map 9 Soil Map 9 Legend 10 Map Unit Legend 11 Map Unit Descriptions 12 Albemarle County, Virginia 14 4B--Asha loam, 2to7 percent slopes 14 4C--Aahe loam, 7tn15 percent slopes 15 4E--Ashe loam, 25tn45 percent slopes 18 7B--Bnoddook loam, 2tn7 percent slopes 17 7C--Brmddunk loam, 7bn15 percent slopes 18 7O--Broddook loam, 15to25 percent slopes 19 8C3--Bnaddock clay loam, 7iu15 percent slopes, severely eroded 20 14O--Chester loam, 15bo25 percent slopes 21 1G--Chewac|a silt loam 22 25B--Dyke silt loam, 2h»7 percent slopes 23 29C--Fouquier silt loam, 7to15 percent slopes 34 38O--Fauquier silt loam, 15bn25 percent slopes 25 29E--Fmuquier silt loam, 25to45 percent slopes 20 38C--Hnyasvi||e loam, 7tn15 percent slopes 27 3GO--Hoyeovi||e loam, 15to25 percent slopes 28 37D3--Hayemvi||a clay loam, 15tn 25 percent slopes, severely eroded 39 59O--Myerovi||e very stony silt loam, 15to25 percent slopes 30 00E--K4yerovi||e'Catootin very stony silt|oemm. 25tn6O percent a|npen 31 66E--Parker very stony loam, 25hn45 percent slopes 32 81B--Thurmnnt loam, 2to7 percent slopes 33 81C--Thunnont loam, 7to15 percent slopes 34 8SC--Unioon silt loam, 7to15 percent slopes 35 S0B--Uniaon very stony silt loam, 2 to7 percent slopes 36 9OC--Unison very stony silt loam, 7bn15 percent slopes 37 9SB--VVorshom loam, 2tn7 percent slopes 38 VV--VVator 39 Rmfmmenmmw 40 4 How Soil Surveys Are Made Soil surveys are made to provide information about the soils and miscellaneous areas in a specific area. They include a description of the soils and miscellaneous areas and their location on the landscape and tables that show soil properties and limitations affecting various uses. Soil scientists observed the steepness, length, and shape of the slopes; the general pattern of drainage; the kinds of crops and native plants; and the kinds of bedrock. They observed and described many soil profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The profile extends from the surface down into the unconsolidated material in which the soil formed or from the surface down to bedrock. The unconsolidated material is devoid of roots and other living organisms and has not been changed by other biological activity. Currently, soils are mapped according to the boundaries of major land resource areas (MLRAs). MLRAs are geographically associated land resource units that share common characteristics related to physiography, geology, climate, water resources, soils, biological resources, and land uses (USDA, 2006). Soil survey areas typically consist of parts of one or more MLRA. The soils and miscellaneous areas in a survey area occur in an orderly pattern that is related to the geology, landforms, relief, climate, and natural vegetation of the area. Each kind of soil and miscellaneous area is associated with a particular kind of landform or with a segment of the landform. By observing the soils and miscellaneous areas in the survey area and relating their position to specific segments of the landform, a soil scientist develops a concept, or model, of how they were formed. Thus, during mapping, this model enables the soil scientist to predict with a considerable degree of accuracy the kind of soil or miscellaneous area at a specific location on the landscape. Commonly, individual soils on the landscape merge into one another as their characteristics gradually change. To construct an accurate soil map, however, soil scientists must determine the boundaries between the soils. They can observe only a limited number of soil profiles. Nevertheless, these observations, supplemented by an understanding of the soil-vegetation-landscape relationship, are sufficient to verify predictions of the kinds of soil in an area and to determine the boundaries. Soil scientists recorded the characteristics of the soil profiles that they studied. They noted soil color, texture, size and shape of soil aggregates, kind and amount of rock fragments, distribution of plant roots, reaction, and other features that enable them to identify soils. After describing the soils in the survey area and determining their properties, the soil scientists assigned the soils to taxonomic classes (units). Taxonomic classes are concepts. Each taxonomic class has a set of soil characteristics with precisely defined limits. The classes are used as a basis for comparison to classify soils systematically. Soil taxonomy, the system of taxonomic classification used in the United States, is based mainly on the kind and character of soil properties and the arrangement of horizons within the profile. After the soil 5 Custom Soil Resource Report scientists classified and named the soils in the survey area, they compared the individual soils with similar soils in the same taxonomic class in other areas so that they could confirm data and assemble additional data based on experience and research. The objective of soil mapping is not to delineate pure map unit components; the objective is to separate the landscape into landforms or landform segments that have similar use and management requirements. Each map unit is defined by a unique combination of soil components and/or miscellaneous areas in predictable proportions. Some components may be highly contrasting to the other components of the map unit. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The delineation of such landforms and landform segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, onsite investigation is needed to define and locate the soils and miscellaneous areas. Soil scientists make many field observations in the process of producing a soil map. The frequency of observation is dependent upon several factors, including scale of mapping, intensity of mapping, design of map units, complexity of the landscape, and experience of the soil scientist. Observations are made to test and refine the soil-landscape model and predictions and to verify the classification of the soils at specific locations. Once the soil-landscape model is refined, a significantly smaller number of measurements of individual soil properties are made and recorded. These measurements may include field measurements, such as those for color, depth to bedrock, and texture, and laboratory measurements, such as those for content of sand, silt, clay, salt, and other components. Properties of each soil typically vary from one point to another across the landscape. Observations for map unit components are aggregated to develop ranges of characteristics for the components. The aggregated values are presented. Direct measurements do not exist for every property presented for every map unit component. Values for some properties are estimated from combinations of other properties. While a soil survey is in progress, samples of some of the soils in the area generally are collected for laboratory analyses and for engineering tests. Soil scientists interpret the data from these analyses and tests as well as the field-observed characteristics and the soil properties to determine the expected behavior of the soils under different uses. Interpretations for all of the soils are field tested through observation of the soils in different uses and under different levels of management. Some interpretations are modified to fit local conditions, and some new interpretations are developed to meet local needs. Data are assembled from other sources, such as research information, production records, and field experience of specialists. For example, data on crop yields under defined levels of management are assembled from farm records and from field or plot experiments on the same kinds of soil. Predictions about soil behavior are based not only on soil properties but also on such variables as climate and biological activity. Soil conditions are predictable over long periods of time, but they are not predictable from year to year. For example, soil scientists can predict with a fairly high degree of accuracy that a given soil will have a high water table within certain depths in most years, but they cannot predict that a high water table will always be at a specific level in the soil on a specific date. After soil scientists located and identified the significant natural bodies of soil in the survey area, they drew the boundaries of these bodies on aerial photographs and 6 Custom Soil Resource Report identified each as a specific map unit. Aerial photographs show trees, buildings, fields, roads, and rivers, all of which help in locating boundaries accurately. 7 Soil Map The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. Also presented are various metadata about data used to produce the map, and a description of each soil map unit. 8 Custom Soil Resource Report Soil Map 1 Rm a k 8 691400 691E00 691000 692000 692200 692400 692000 682800 033000 693200 693400 693300 38°2"43"N c. 38°2'43"N e � _ 8 • i•y -. - - 014 -- • . .66E I i ��YJ 66 C > •7. 4ESii _ t Ltd `'."� .. • n 29C 89C • . oo° • 5 :y ZD 7C.� � 36D .e z { 59itt.D N (1JV 37D3 90B, 76 s� _f :f �� 8 !s`� \/.91;) 8C3 4Bl ' "t, `. 4}• t y , i ..,,Fs• �. F 36D w_8 , S 7C 36C 'a.' :1 r; iii ' 14\ 7B./c r 96B a ,.' i s- 25B i ii d, ; 36D ,4. `010 , , 3703 `` �.+, 7B 36C + 16 no....d•..�- 36D •- -. 38°1'51"N 691400 691600 691800 692000 692200 692400 692600 693000 693200 693,100 690800 693900 3 3 Map Scale:1:11,300 irprinted on A landscape(11"x 8.5")sheet 14 Meters ik N 300 600 900 A _i Feet 0 500 1000 2003 9000 Map projection:Web Meitator Corner coordinates:WGS84 Edge tics:UTM Zone 17N WGS84 9 Custom Soil Resource Report MAP LEGEND MAP INFORMATION Area of Interest(AOI) gig Spoil Area The soil surveys that comprise your AOI were mapped at Area of Interest(AOI) 1:15,800. Stony Spot Soils 03 Very Stony Spot Please rely on the bar scale on each map sheet for map Soil Map Unit Polygons measurements. Wet Spot r - Soil Map Unit Lines Other Source of Map: Natural Resources Conservation Service • Soil Map Unit Points Web Soil Survey URL: Aw Special Line Features Coordinate System: Web Mercator(EPSG:3857) Point Features Y ( ) w Blowout Water Features Streams and Canals Maps from the Web Soil Survey are based on the Web Mercator la Borrow Pit projection,which preserves direction and shape but distorts Transportation distance and area.A projection that preserves area,such as the Clay Spot Rails Albers equal-area conic projection,should be used if more 0 Closed Depression ram/ Interstate Highways accurate calculations of distance or area are required. X Gravel Pit US Routes This product is generated from the USDA-NRCS certified data as Gravelly Spot Major Roads of the version date(s)listed below. • Landfill Local Roads Soil Survey Area: Albemarle County,Virginia k Lava Flow Background Survey Area Data: Version 12,Aug 29,2018 Marsh or swamp ® Aerial Photography Soil map units are labeled(as space allows)for map scales chi Mine or Quarry 1:50,000 or larger. O Miscellaneous Water Date(s)aerial images were photographed: Nov 12,2011—Mar O Perennial Water 26,2017 tv Rock Outcrop The orthophoto or other base map on which the soil lines were + Saline Spot compiled and digitized probably differs from the background Sandy Spot imagery displayed on these maps.As a result,some minor e shifting of map unit boundaries may be evident. Severely Eroded Spot • Sinkhole 1, Slide or Slip • Sodic Spot 10 Custom Soil Resource Report Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AO1 4B Ashe loam,2 to 7 percent 1.1 0.3% slopes 4C Ashe loam,7 to 15 percent 1.8 0.6% slopes 4E Ashe loam,25 to 45 percent 7.7 2.4% slopes 7B Braddock loam,2 to 7 percent 28.9 9.1% slopes 7C Braddock loam,7 to 15 percent 38.6 12.1% slopes 7D Braddock loam,15 to 25 3.3 1.0% percent slopes 8C3 Braddock clay loam,7 to 15 2.1 0.6% percent slopes,severely eroded 14D Chester loam,15 to 25 percent 1.5 0.5% slopes 16 Chewacla silt loam 0.1 0.0% 25B Dyke silt loam,2 to 7 percent 12.7 4.0% slopes 29C Fauquier silt loam,7 to 15 3.9 1.2% percent slopes 29D Fauquier silt loam,15 to 25 10.3 3.2% percent slopes 29E Fauquier sift loam,25 to 45 3.7 1.2% percent slopes 36C Hayesville loam,7 to 15 percent 20.4 6.4% slopes 36D Hayesville loam, 15 to 25 86.7 27.2% percent slopes 37D3 Hayesville clay loam, 15 to 25 0.1 0.0% percent slopes,severely eroded 59D Myersville very stony silt loam, 0.5 0.1% 15 to 25 percent slopes 60E Myersville-Catoctin very stony 44.2 13.9% silt foams,25 to 60 percent slopes 66E Parker very stony loam,25 to 5.6 1.8% 45 percent slopes 81B Thurmont loam,2 to 7 percent 2.9 0.9% slopes 81C Thurmont loam,7 to 15 percent 6.7 2.1% slopes 11 Custom Soil Resource Report Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 89C Unison silt loam,7 to 15 19.2 6.0% percent slopes 90B Unison very stony silt loam,2 to 0.4 0.1% 7 percent slopes 90C Unison very stony silt loam,7 to 1.1 0.3% 15 percent slopes 96B Worsham loam,2 to 7 percent 10.6 3.3% slopes Water 4.6 1.5% Totals for Area of Interest 318.6 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas.A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the 12 Custom Soil Resource Report development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha-Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. 13 Custom Soil Resource Report • Albemarle County, Virginia 4B—Ashe loam, 2 to 7 percent slopes Map Unit Setting National map unit symbol: kbbz Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Not prime farmland Map Unit Composition Ashe and similar soils: 80 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Ashe Setting Landform: Mountain slopes Landform position (two-dimensional): Summit Landform position (three-dimensional): Interfluve Down-slope shape: Convex Across-slope shape: Convex Parent material: Residuum weathered from granite and gneiss Typical profile H1 - 0 to 10 inches: loam H2- 10 to 19 inches: loam H3- 19 to 24 inches: sandy loam H4- 24 to 79 inches: bedrock Properties and qualities Slope: 2 to 7 percent Depth to restrictive feature: 20 to 40 inches to lithic bedrock Natural drainage class: Somewhat excessively drained Runoff class: Low Capacity of the most limiting layer to transmit water(Ksat): Very low to high (0.00 to 5.95 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Low(about 3.2 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 3e Hydrologic Soil Group: B Hydric soil rating: No 14 Custom Soil Resource Report 4C—Ashe loam, 7 to 15 percent slopes Map Unit Setting National map unit symbol: kbc0 Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Not prime farmland Map Unit Composition Ashe and similar soils: 80 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Ashe Setting Landform: Mountain slopes Landform position (two-dimensional): Summit Landform position (three-dimensional): Interfluve Down-slope shape: Convex Across-slope shape: Convex Parent material: Residuum weathered from granite and gneiss Typical profile H1 - 0 to 10 inches: loam H2- 10 to 19 inches: loam H3- 19 to 24 inches: sandy loam H4- 24 to 79 inches: bedrock Properties and qualities Slope: 7 to 15 percent Depth to restrictive feature: 20 to 40 inches to lithic bedrock Natural drainage class: Somewhat excessively drained Runoff class: Low Capacity of the most limiting layer to transmit water(Ksat): Very low to high (0.00 to 5.95 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Low(about 3.2 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 4e Hydrologic Soil Group: B Hydric soil rating: No 15 Custom Soil Resource Report • 4E—Ashe loam, 25 to 45 percent slopes Map Unit Setting National map unit symbol: kbc2 Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Not prime farmland Map Unit Composition Ashe and similar soils: 75 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Ashe Setting Landform: Mountain slopes Landform position (two-dimensional): Summit Landform position (three-dimensional): Interfluve Down-slope shape: Convex Across-slope shape: Convex Parent material: Residuum weathered from granite and gneiss Typical profile H1 - 0 to 10 inches: loam H2- 10 to 19 inches: loam H3- 19 to 24 inches: sandy loam H4-24 to 79 inches: bedrock Properties and qualities Slope: 25 to 45 percent Depth to restrictive feature: 20 to 40 inches to lithic bedrock Natural drainage class: Somewhat excessively drained Runoff class: Medium Capacity of the most limiting layer to transmit water(Ksat): Very low to high (0.00 to 5.95 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Low(about 3.2 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 7e Hydrologic Soil Group: B Hydric soil rating: No 16 Custom Soil Resource Report 7B—Braddock loam, 2 to 7 percent slopes Map Unit Setting National map unit symbol: kbfb Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: All areas are prime farmland Map Unit Composition Braddock and similar soils: 80 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Braddock Setting Landform: Fans Landform position (three-dimensional): Tread Down-slope shape: Convex Across-slope shape: Linear Parent material: Alluvium and colluvium derived from acid crystalline rocks Typical profile H1 -0 to 8 inches: loam H2- 8 to 79 inches: clay Properties and qualities Slope: 2 to 7 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: High (about 9.1 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 2e Hydrologic Soil Group: B Hydric soil rating: No 17 Custom Soil Resource Report 7C—Braddock loam, 7 to 15 percent slopes Map Unit Setting National map unit symbol: kbfc Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Farmland of statewide importance Map Unit Composition Braddock and similar soils: 80 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Braddock Setting Landform: Fans Landform position (three-dimensional): Tread Down-slope shape: Convex Across-slope shape: Linear Parent material: Alluvium and colluvium derived from acid crystalline rocks Typical profile H1 - 0 to 8 inches: loam H2-8 to 79 inches: clay Properties and qualities Slope: 7 to 15 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: High (about 9.1 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 3e Hydrologic Soil Group: B Hydric soil rating: No 18 Custom Soil Resource Report 7D—Braddock loam, 15 to 25 percent slopes Map Unit Setting National map unit symbol: kbfd Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Farmland of statewide importance Map Unit Composition Braddock and similar soils: 80 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Braddock Setting Landform: Fans Landform position (three-dimensional): Tread Down-slope shape: Convex Across-slope shape: Linear Parent material: Alluvium and colluvium derived from acid crystalline rocks Typical profile H1 - 0 to 8 inches: loam H2- 8 to 79 inches: clay Properties and qualities Slope: 15 to 25 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: High Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: High (about 9.1 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 4e Hydrologic Soil Group: B Hydric soil rating: No 19 Custom Soil Resource Report • 8C3—Braddock clay loam, 7 to 15 percent slopes, severely eroded Map Unit Setting National map unit symbol: kbg 1 Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Not prime farmland Map Unit Composition Braddock and similar soils: 80 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Braddock Setting Landform: Fans Landform position (three-dimensional): Tread Down-slope shape: Convex Across-slope shape: Linear Parent material: Alluvium and colluvium derived from acid crystalline rocks Typical profile H1 - 0 to 4 inches: clay loam H2-4 to 79 inches: clay Properties and qualities Slope: 7 to 15 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.57 to 1.98 inihr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: High (about 9.1 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 4e Hydrologic Soil Group: B Hydric soil rating: No 20 Custom Soil Resource Report 14D—Chester loam, 15 to 25 percent slopes Map Unit Setting National map unit symbol: kb82 Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Farmland of statewide importance Map Unit Composition Chester and similar soils: 80 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Chester Setting Landform: Hillslopes Landform position (two-dimensional): Summit Landform position (three-dimensional): Interfluve Down-slope shape: Convex Across-slope shape: Convex Parent material: Residuum weathered from granite and gneiss Typical profile H1 - 0 to 7 inches: loam H2- 7 to 41 inches: clay loam H3-41 to 79 inches: loam Properties and qualities Slope: 15 to 25 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: High Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Moderate (about 6.9 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 4e Hydrologic Soil Group: B Hydric soil rating: No 21 Custom Soil Resource Report • 16—Chewacla silt loam Map Unit Setting National map unit symbol: kb87 Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Prime farmland if drained and either protected from flooding or not frequently flooded during the growing season Map Unit Composition Chewacla and similar soils: 85 percent Minor components: 3 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Chewacla Setting Landform: Flood plains Down-slope shape: Linear Across-slope shape: Linear Parent material: Residuum weathered from granite and gneiss Typical profile H1 - 0 to 8 inches: silt loam H2- 8 to 16 inches: silt loam H3- 16 to 26 inches: silty clay loam H4- 26 to 40 inches: silty clay loam H5-40 to 79 inches: silt loam Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Somewhat poorly drained Runoff class: Very high Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: About 6 to 18 inches Frequency of flooding: Occasional Frequency of ponding: None Available water storage in profile: High (about 11.6 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 3w Hydrologic Soil Group: B/D Hydric soil rating: No Minor Components Wehadkee Percent of map unit: 3 percent 22 Custom Soil Resource Report Landform: Flood plains Down-slope shape: Linear Across-slope shape: Linear Hydric soil rating: Yes 25B—Dyke silt loam, 2 to 7 percent slopes Map Unit Setting National map unit symbol: kb8s Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: All areas are prime farmland Map Unit Composition Dyke and similar soils: 85 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Dyke Setting Landform: Fans Landform position (two-dimensional): Footslope Landform position (three-dimensional): Base slope Down-slope shape: Concave Across-slope shape: Convex Parent material: Residuum weathered from greenstone Typical profile H1 - 0 to 8 inches: silt loam H2- 8 to 43 inches: clay H3-43 to 79 inches: gravelly clay Properties and qualities Slope: 2 to 7 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: High (about 9.1 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 2e Hydrologic Soil Group: B Hydric soil rating: No 23 Custom Soil Resource Report • 29C—Fauquier silt loam, 7 to 15 percent slopes Map Unit Setting National map unit symbol: kb94 Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Farmland of statewide importance Map Unit Composition Fauquier and similar soils: 85 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Fauquier Setting Landform: Hillslopes Landform position (two-dimensional): Summit Landform position (three-dimensional): Interfluve Down-slope shape: Convex Across-slope shape: Convex Parent material: Residuum weathered from greenstone Typical profile H1 -0 to 6 inches: silt loam H2- 6 to 34 inches: clay H3-34 to 79 inches: bedrock Properties and qualities Slope: 7 to 15 percent Depth to restrictive feature: 20 to 40 inches to paralithic bedrock Natural drainage class: Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water(Ksat): Very low to high (0.00 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Low(about 5.3 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 3e Hydrologic Soil Group: C Hydric soil rating: No 24 Custom Soil Resource Report 29D—Fauquier silt loam, 15 to 25 percent slopes Map Unit Setting National map unit symbol: kb95 Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Farmland of statewide importance Map Unit Composition Fauquier and similar soils: 85 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Fauquier Setting Landform: Hillslopes Landform position (two-dimensional): Summit Landform position (three-dimensional): Interfiuve Down-slope shape: Convex Across-slope shape: Convex Parent material: Residuum weathered from greenstone Typical profile H1 - 0 to 6 inches: silt loam H2- 6 to 34 inches: clay H3-34 to 79 inches: bedrock Properties and qualities Slope: 15 to 25 percent Depth to restrictive feature: 20 to 40 inches to paralithic bedrock Natural drainage class: Well drained Runoff class: High Capacity of the most limiting layer to transmit water(Ksat): Very low to high (0.00 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Low(about 5.3 inches) Interpretive groups Land capability classification(irrigated): None specified Land capability classification(nonirrigated): 4e Hydrologic Soil Group: C Hydric soil rating: No 25 Custom Soil Resource Report 29E—Fauquier silt loam, 25 to 45 percent slopes Map Unit Setting National map unit symbol: kb96 Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Not prime farmland Map Unit Composition Fauquier and similar soils: 85 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Fauquier Setting Landform: Hillslopes Landform position (two-dimensional): Summit Landform position (three-dimensional): Interfluve Down-slope shape: Convex • Across-slope shape: Convex Parent material: Residuum weathered from greenstone Typical profile H1 - 0 to 6 inches: silt loam H2- 6 to 34 inches: clay H3-34 to 79 inches: bedrock Properties and qualities Slope: 25 to 45 percent Depth to restrictive feature: 20 to 40 inches to paralithic bedrock Natural drainage class: Well drained Runoff class: High Capacity of the most limiting layer to transmit water(Ksat): Very low to high (0.00 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Low(about 5.3 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 7e Hydrologic Soil Group: C Hydric soil rating: No 26 Custom Soil Resource Report 36C—Hayesville loam, 7 to 15 percent slopes Map Unit Setting National map unit symbol: kb9r Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Farmland of statewide importance Map Unit Composition Hayesville and similar soils: 80 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Hayesville Setting Landform: Hillslopes Landform position (two-dimensional): Summit Landform position (three-dimensional): Intertuve Down-slope shape: Convex Across-slope shape: Convex Parent material: Residuum weathered from granite and gneiss Typical profile H1 - 0 to 7 inches: loam H2- 7 to 58 inches: clay H3-58 to 67 inches: sandy clay loam H4- 67 to 83 inches: fine sandy loam Properties and qualities Slope: 7 to 15 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: High (about 10.6 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 4e Hydrologic Soil Group: B Hydric soil rating: No 27 Custom Soil Resource Report 36D—Hayesville loam, 15 to 25 percent slopes Map Unit Setting National map unit symbol: kb9s Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Farmland of statewide importance Map Unit Composition Hayesville and similar soils: 80 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Hayesville Setting Landform: Hillslopes Landform position (two-dimensional): Summit Landform position (three-dimensional): Interfluve Down-slope shape: Convex Across-slope shape: Convex Parent material: Residuum weathered from granite and gneiss Typical profile H1 - 0 to 7 inches: loam H2- 7 to 58 inches: clay H3-58 to 67 inches: sandy clay loam H4-67 to 83 inches: fine sandy loam Properties and qualities Slope: 15 to 25 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: High Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: High (about 10.6 inches) Interpretive groups Land capability classification(irrigated): None specified Land capability classification(nonirrigated): 6e Hydrologic Soil Group: B Hydric soil rating: No 28 Custom Soil Resource Report 37D3—Hayesville clay loam, 15 to 25 percent slopes, severely eroded Map Unit Setting National map unit symbol: kb9x Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Not prime farmland Map Unit Composition Hayesville and similar soils: 80 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Hayesville Setting Landform: Hillslopes Landform position (two-dimensional): Summit Landform position (three-dimensional): Interfluve Down-slope shape: Convex Across-slope shape: Convex Parent material: Residuum weathered from granite and gneiss Typical profile H1 - 0 to 7 inches: clay loam H2- 7 to 58 inches: clay H3- 58 to 67 inches: sandy clay loam H4- 67 to 83 inches: fine sandy loam Properties and qualities Slope: 15 to 25 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: High Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: High (about 10.6 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6e Hydrologic Soil Group: B Hydric soil rating: No 29 Custom Soil Resource Report 59D—Myersville very stony silt loam, 15 to 25 percent slopes Map Unit Setting National map unit symbol: kbcs Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Farmland of statewide importance Map Unit Composition Myersville and similar soils: 80 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Myersville Setting Landform: Interfluves Landform position (two-dimensional): Backslope Landform position (three-dimensional): Side slope Down-slope shape: Linear Across-slope shape: Convex Parent material: Residuum weathered from greenstone Typical profile H1 - 0 to 7 inches: silt loam H2- 7 to 28 inches: silty clay loam H3- 28 to 44 inches: silt loam H4- 44 to 79 inches: bedrock Properties and qualities Slope: 15 to 25 percent Percent of area covered with surface fragments: 7.0 percent Depth to restrictive feature: 40 to 60 inches to paralithic bedrock Natural drainage class: Well drained Runoff class: High Capacity of the most limiting layer to transmit water(Ksat): Very low to high (0.00 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Moderate (about 6.3 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6s Hydrologic Soil Group: B Hydric soil rating: No 30 Custom Soil Resource Report 60E—Myersville-Catoctin very stony silt loarns, 25 to 60 percent slopes Map Unit Setting National map unit symbol: kbcz Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Not prime farmland Map Unit Composition Myersville and similar soils: 60 percent Catoctin and similar soils: 30 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Myersville Setting Landform: Interfluves Landform position (two-dimensional): Backslope Landform position (three-dimensional): Side slope Down-slope shape: Linear Across-slope shape: Convex Parent material: Residuum weathered from greenstone Typical profile H1 - 0 to 7 inches: silt loam H2- 7 to 28 inches: silty clay loam H3- 28 to 44 inches: silt loam H4-44 to 79 inches: bedrock Properties and qualities Slope: 25 to 60 percent Percent of area covered with surface fragments: 7.0 percent Depth to restrictive feature: 40 to 60 inches to paralithic bedrock Natural drainage class: Well drained Runoff class: High Capacity of the most limiting layer to transmit water(Ksat): Very low to high (0.00 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Moderate (about 6.3 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 7e Hydrologic Soil Group: B Hydric soil rating: No 31 Custom Soil Resource Report Description of Catoctin Setting Landform: I nterfl uves Landform position (two-dimensional): Backslope Landform position (three-dimensional): Side slope Down-slope shape: Linear Across-slope shape: Convex Parent material: Residuum weathered from greenstone Typical profile H1 - 0 to 5 inches: silt loam H2- 5 to 18 inches: very channery silt loam H3- 18 to 28 inches: extremely channery silt loam H4 - 28 to 79 inches: bedrock Properties and qualities Slope: 25 to 60 percent Percent of area covered with surface fragments: 7.0 percent Depth to restrictive feature: 20 to 40 inches to lithic bedrock Natural drainage class: Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water(Ksat): Very low to high (0.00 to 5.95 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Low(about 3.4 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 7e Hydrologic Soil Group: B Hydric soil rating: No 66E—Parker very stony loam, 25 to 45 percent slopes Map Unit Setting National map unit symbol: kbdc Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Not prime farmland Map Unit Composition Parker and similar soils: 75 percent Estimates are based on observations, descriptions, and transects of the mapunit. 32 Custom Soil Resource Report Description of Parker Setting Landform: Interfluves Landform position (two-dimensional): Backslope Landform position (three-dimensional): Side slope Down-slope shape: Linear Across-slope shape: Convex Parent material: Residuum weathered from granite and gneiss Typical profile H1 - 0 to 14 inches: extremely stony loam H2- 14 to 38 inches: extremely cobbly loam H3-38 to 67 inches: very stony sandy loam H4- 67 to 79 inches: bedrock Properties and qualities Slope: 25 to 45 percent Percent of area covered with surface fragments: 7.0 percent Depth to restrictive feature: 48 to 80 inches to lithic bedrock Natural drainage class: Somewhat excessively drained Runoff class: Medium Capacity of the most limiting layer to transmit water(Ksat): Very low (0.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Low(about 5.6 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 7s Hydrologic Soil Group: A Hydric soil rating: No 81 B—Thurmont loam, 2 to 7 percent slopes Map Unit Setting National map unit symbol: kbfh Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: All areas are prime farmland Map Unit Composition Thurmont and similar soils: 80 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Thurmont Setting Landform: Interfluves Landform position (two-dimensional): Summit 33 Custom Soil Resource Report Landform position (three-dimensional): Interfiuve Down-slope shape: Convex Across-slope shape: Convex Parent material: Colluvium derived from granite, granodiorite, and granite gneiss Typical profile H1 - 0 to 10 inches: loam H2- 10 to 46 inches: clay loam H3-46 to 56 inches: loam H4- 56 to 79 inches: cobbly sandy loam Properties and qualities Slope: 2 to 7 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: About 48 to 79 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Moderate (about 8.3 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 2e Hydrologic Soil Group: B Hydric soil rating: No 81C—Thurmont loam, 7 to 15 percent slopes Map Unit Setting National map unit symbol: kbfj Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Farmland of statewide importance Map Unit Composition. Thurmont and similar soils: 80 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Thurmont Setting Landform: Interfiuves Landform position (two-dimensional): Backslope Landform position (three-dimensional): Interfluve Down-slope shape: Convex Across-slope shape: Convex Parent material: Colluvium derived from granite, granodiorite, and granite gneiss 34 Custom Soil Resource Report Typical profile H1 - 0 to 10 inches: loam H2- 10 to 46 inches: clay loam H3-46 to 56 inches: loam H4 - 56 to 79 inches: cobbly sandy loam Properties and qualities Slope: 7 to 15 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: About 48 to 79 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Moderate (about 8.3 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 3e Hydrologic Soil Group: B Hydric soil rating: No 89C—Unison silt loam, 7 to 15 percent slopes Map Unit Setting National map unit symbol: kbg0 Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Farmland of statewide importance Map Unit Composition Unison and similar soils: 80 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Unison Setting Landform: Fans Landform position (two-dimensional): Footslope Landform position (three-dimensional): Base slope Down-slope shape: Concave Across-slope shape: Convex Parent material: Colluvium derived from greenstone Typical profile H1 - 0 to 6 inches: silt loam H2- 6 to 58 inches: silty clay loam H3- 58 to 79 inches: cobbly clay loam 35 • Custom Soil Resource Report Properties and qualities Slope: 7 to 15 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: High (about 9.0 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 3e Hydrologic Soil Group: B Hydric soil rating: No 90B—Unison very stony silt loam, 2 to 7 percent slopes Map Unit Setting National map unit symbol: kbg2 Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Not prime farmland Map Unit Composition Unison and similar soils: 80 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Unison Setting Landform: Fans Landform position (two-dimensional): Footslope Landform position (three-dimensional): Base slope Down-slope shape: Concave Across-slope shape: Convex Parent material: Colluvium derived from greenstone Typical profile H1 - 0 to 6 inches: silt loam H2- 6 to 58 inches: silty clay loam H3- 58 to 79 inches: cobbly clay loam Properties and qualities Slope: 2 to 7 percent Percent of area covered with surface fragments: 7.0 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Medium 36 Custom Soil Resource Report Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: High (about 9.0 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6s Hydrologic Soil Group: B Hydric soil rating: No 90C—Unison very stony silt loam, 7 to 15 percent slopes Map Unit Setting National map unit symbol: kbg3 Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Not prime farmland Map Unit Composition Unison and similar soils: 75 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Unison Setting Landform: Fans Landform position (two-dimensional): Footslope Landform position (three-dimensional): Base slope Down-slope shape: Concave Across-slope shape: Convex Parent material: Colluvium derived from greenstone Typical profile H1 - 0 to 6 inches: silt loam H2- 6 to 58 inches: silty clay loam H3- 58 to 79 inches: cobbly clay loam Properties and qualities Slope: 7 to 15 percent Percent of area covered with surface fragments: 7.0 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None 37 Custom Soil Resource Report Available water storage in profile: High (about 9.0 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification(nonirrigated): 6s Hydrologic Soil Group: B Hydric soil rating: No 96B—Worsham loam, 2 to 7 percent slopes Map Unit Setting National map unit symbol: kbgf Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Not prime farmland Map Unit Composition Worsham and similar soils: 75 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Worsham Setting Landform: Drainageways Landform position (two-dimensional): Footslope Landform position (three-dimensional): Head slope, tread Down-slope shape: Concave Across-slope shape: Convex Parent material: Colluvium derived from igneous rock Typical profile H1 - 0 to 9 inches: loam H2- 9 to 54 inches: clay H3- 54 to 79 inches: sandy clay loam Properties and qualities Slope: 2 to 7 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Poorly drained Runoff class: Very high Capacity of the most limiting layer to transmit water(Ksat): Very low to moderately low(0.00 to 0.06 in/hr) Depth to water table: About 0 to 12 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Moderate (about 8.2 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 4w Hydrologic Soil Group: D Hydric soil rating: Yes 38 Custom Soil Resource Report W—Water Map Unit Setting National map unit symbol: kbgk Mean annual precipitation: 25 to 65 inches Mean annual air temperature: 54 to 59 degrees F Frost-free period: 195 to 231 days Farmland classification: Not prime farmland Map Unit Composition Water: 100 percent Estimates are based on observations, descriptions, and transects of the mapunit. 39 References American Association of State Highway and Transportation Officials(AASHTO). 2004. Standard specifications for transportation materials and methods of sampling and testing. 24th edition. American Society for Testing and Materials (ASTM). 2005. Standard classification of soils for engineering purposes. ASTM Standard D2487-00. Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife Service FWS/OBS-79/31. Federal Register. July 13, 1994. Changes in hydric soils of the United States. Federal Register. September 18, 2002. Hydric soils of the United States. Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric soils in the United States. National Research Council. 1995. Wetlands: Characteristics and boundaries. Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U.S. Department of Agriculture Handbook 18. http://www.nres.usda.gov/wps/portal/ nres/detail/national/soils/?cid=nres142p2_054262 Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service, U.S. Department of Agriculture Handbook 436. http:// www.nres.usda.gov/wps/portal/nres/detail/national/soils/?cid=nres142p2_053577 Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. http:// www.nres.usda.gov/wps/portal/nres/detail/national/soils/?cid=nres142p2_053580 Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and Delaware Department of Natural Resources and Environmental Control, Wetlands Section. United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of Engineers wetlands delineation manual. Waterways Experiment Station Technical Report Y-87-1. United States Department of Agriculture, Natural Resources Conservation Service. National forestry manual. http://www.nres.usda.gov/wps/portal/nres/detail/soils/ home/?cid=nres142p2_053374 United States Department of Agriculture, Natural Resources Conservation Service. National range and pasture handbook. http://www.nres.usda.gov/wps/portal/nres/ detail/national/landuse/rangepasture/?cid=stelprdb1043084 40 Custom Soil Resource Report United States Department of Agriculture, Natural Resources Conservation Service. National soil survey handbook, title 430-VI. http://www.nres.usda.gov/wps/portal/ nres/detail/soils/scientists/?cid=nres142p2_054242 United States Department of Agriculture, Natural Resources Conservation Service. 2006. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296. http://www.nres.usda.gov/wps/portal/nres/detail/national/soils/? cid=nres142p2_053624 United States Department of Agriculture, Soil Conservation Service. 1961. Land capability classification. U.S. Department of Agriculture Handbook 210. http:// www.nres.usda.gov/Internet/FSE_DOCUMENTS/nres142p2_052290.pdf 41