JEFFCO.DippingBedrock

20160430 09055800 FALSE 20251121 08453500 20251121 08453500 DippingBedrock 002 3062462.837147 3119419.855122 1603289.621958 1757962.167927 1 Projected GCS_WGS_1984 Linear Unit: Meter (1.000000) WGS_1984_Web_Mercator_Auxiliary_Sphere <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.3.0'><WKT>PROJCS["WGS_1984_Web_Mercator_Auxiliary_Sphere",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator_Auxiliary_Sphere"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",0.0],PARAMETER["Auxiliary_Sphere_Type",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3857]]</WKT><XOrigin>-20037700</XOrigin><YOrigin>-30241100</YOrigin><XYScale>10000</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>102100</WKID><LatestWKID>3857</LatestWKID></ProjectedCoordinateSystem> 1.0 500000 5000 ItemDescription /9j/4AAQSkZJRgABAQEAYABgAAD/2wBDAAMCAgMCAgMDAwMEAwMEBQgFBQQEBQoHBwYIDAoMDAsK CwsNDhIQDQ4RDgsLEBYQERMUFRUVDA8XGBYUGBIUFRT/2wBDAQMEBAUEBQkFBQkUDQsNFBQUFBQU FBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBT/wAARCACFAMgDASIA AhEBAxEB/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAAAgEDAwIEAwUFBAQA AAF9AQIDAAQRBRIhMUEGE1FhByJxFDKBkaEII0KxwRVS0fAkM2JyggkKFhcYGRolJicoKSo0NTY3 ODk6Q0RFRkdISUpTVFVWV1hZWmNkZWZnaGlqc3R1dnd4eXqDhIWGh4iJipKTlJWWl5iZmqKjpKWm p6ipqrKztLW2t7i5usLDxMXGx8jJytLT1NXW19jZ2uHi4+Tl5ufo6erx8vP09fb3+Pn6/8QAHwEA AwEBAQEBAQEBAQAAAAAAAAECAwQFBgcICQoL/8QAtREAAgECBAQDBAcFBAQAAQJ3AAECAxEEBSEx BhJBUQdhcRMiMoEIFEKRobHBCSMzUvAVYnLRChYkNOEl8RcYGRomJygpKjU2Nzg5OkNERUZHSElK U1RVVldYWVpjZGVmZ2hpanN0dXZ3eHl6goOEhYaHiImKkpOUlZaXmJmaoqOkpaanqKmqsrO0tba3 uLm6wsPExcbHyMnK0tPU1dbX2Nna4uPk5ebn6Onq8vP09fb3+Pn6/9oADAMBAAIRAxEAPwD9U6KK KACiiigAooooAKKKKACoby8isbdppmKxqQMqpY5JAAAAyeSKmrL8QjdYxBv9X9oh3kdRhwVx/wAC 2g+xNY1qjpUpVEtk39w1q7C/8JFZel1/4Bzf/EVetbqO9t454SWjkUMpKlT+IPIPseRWZU3h9t2m n/rvOP8AyK9eBlWaVcdUlCpFKyvpc1qU1FaGlRRRX0piFFFFABRRRQAUUUUAFFFFABRRRQAUUUUA FFFFABRRRQAUUUUAFFFFABUN5ape2ssDkhZFKll6j3HuKmopb6MDAsZnuLOJ5AFlK4kVeiuOGH4H I/Crnh3/AJBp/wCvif8A9HPVSTEOtXsQzh0juD7FtyED/v2D+Jq34d/5Bp/6+J//AEc9fHZTQ+rY +tS7L9UdNR80UzTooor7I5gooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooA KKKKAMXUl+z6tHMx+S5jWBfZk3sB+ILH/gPuKTR1ka/keAFbHDiTPCtLuHKj/vvJ4BJHXnFnxBj+ z1bHInhwe4zIo/kSPxp3h8EaDp24Yc28bN3yxUEn35zXiRwSWYyxCb2X37fp95rze5Y0KKKK9syC iiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAqapaveWEscePN4ePd0 3qQy59sgZ9qp+H7weW1gwKSWoChW4ITsD7gYHfI2tn5hWvXPa9C9lf29/bowf5g208O/y7VPYblV lz6le4GOOv8Aumq/Rb+nf5b+lylrodDRTIZkuIY5Y23xyKGVh3BGQafXYSFFFFABRRRQAUUUUAFF FFABRRRQAUUUUAFFFFABRRRQAUUUUAFFFFABRRRQAVT1a1e802eOMAzbd0Wem9TuX/x4CrlFTKKk nF7MDG8O3aOskSn92/8ApMOe6PyfxDEk+gZfWtmuYs43jRZIcLJbTzJGrcAoHZQhPXGAPxVTzjFb ljqKXmUKNDOoy0bfzB7j/JxXiZZjITj9Wm/fhdeqXX/M1nF/F0Zbooor3TIKKKKACiiigAooooAK KKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigDD1KF9PumukQvazMPOwR+6bgB8f3SMZ9MA4 5JCXEbuoaJgk8Z3RsemR2Pseh9ia17y2W8s57diQsyNGSOoBGKxrGdrmzhkddkjKN6/3W/iX6g5H 4V8HnmHWFrwxVHRv811+Z10nzLlZsWV0t9axzoCoccqeqnoVPuDkfhU9ZWhv5cl5a9kfzkX0V8k/ +PiQ/iK1a+zw1b6xRhV7pM5ZKzsFFFFdIgooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKA CiiigAooooAK5+OM2N9dWrEYZ2uIvUq7Zb6kOW6dAVroKoatppvo0khYR3cJLROehz1Rv9k8Z+gP UCvKzLB/XcO6cfiWq9TSEuV3KDSfYr2C5H3WIhlHqrHCn6hiOvQM/rW9XOq0eq6aCQyxXMPI7gMv 8+a19KumvNNtppMeayDzAOz9GH4HI/CvI4fxDlSnQl9nb5/8H8zSstbluiiivrDnCiiigAooooAK KKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooA5+3jNpNcWjceU26PH/PNiSv0A5X/g FXPD+fs9yOFUXD7Y+6dCc/U5b6MKTXYzGtveKjMYGKyCNSzGNhggAf7QRj7KfoZfD9o9lo1pHKuy 4MYef5t371uXOf8AeJ/+tXzuEwLw2Pq1I/C1+b/S34o2lLmgkaFFFFfRGIUUUUAFFFFABRRRQAUU UUAFFFFABRRRQAUUUUAFFFFABRRRQAUUUUAFFFFABRRRQAUUUUAFFFFABRRRQAUUUUAFFFFAH//Z 20150804 en FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time REQUIRED: The person responsible for the metadata information. REQUIRED: The organization responsible for the metadata information. REQUIRED: The mailing and/or physical address for the organization or individual. REQUIRED: The city of the address. REQUIRED: The state or province of the address. REQUIRED: The ZIP or other postal code of the address. REQUIRED: The telephone number by which individuals can speak to the organization or individual. 20251121 ESRI ArcCatalog 9.3.1.4000 en Data Type: Static. Vintage: Per Board of County Commissioners (BCC) resolution CC95-134, dated April 11, 1995.The Designated Dipping Bedrock Area (DDBA) defines an area of Jefferson county where heaving bedrock is possible under certain geological and human-influenced conditions. Special consideration is warranted in all phases of development including site exploration and evaluation, facilities design, construction, and subsequent maintenance. In some areas, avoidance may be the best mitigation method.Heaving Bedrock Geological HazardHistorically, a high rate of damage to roads, utilities, and lightly loaded structures has occurred where steeply dipping beds of expansive claystone bedrock is found near the ground surface. In such areas, ridges of “heaving bedrock”, as large as two feet high, several tens of feet wide, and several hundreds of feet long have been mapped. The ridges form where adjacent, dipping layers of bedrock, each possessing a different potential for expansion, are exposed to water. Damage from heaving bedrock typically is seen within ten years after development and ground deformations may continue for year or decades. This geological hazard is responsible for tens of millions of dollars in excess of maintenance costs to county taxpayers and homeowners. Compared to damage caused by flat-lying expansive soils and bedrock, which are found to the east over much of the Denver metropolitan area, heaving bedrock problems are more complex in nature and difficult to predict, and the resulting damage is often more localized and destructive.Considerations for Proposed and Existing SubdivisionsThe Designated Dipping Bedrock Area (DDBA) contains many areas where geological conditions are favorable for development, and where satisfactory performance of homes and other facilities has occurred. Detailed geological/geotechnical investigations should be conducted for proposed developments within the DDBA to delineate areas where favorable conditions occur, such as thick alluvial soils or layers of nonexpansive bedrock. Special mitigative designs must be employed where zones of potentially heaving bedrock are encountered. Existing subdivisions are not subject to most of the overlay district regulations. However, large additions of remedial structural repair work may be subject to minimum foundation design standards and special review by the Building Department. Potential home buyers should be aware that the distribution of areas of damage within the DDBA may be erratic. A home that exhibits structural damage may be located next to other homes that have no damage. When purchasing an existing home within the map area, or any other expansive soil area, the buyer should have a structural engineer conduct a detailed evaluation of the home to ensure that it is structurally sound.Geology and BoundariesThe DDBA contains eight sedimentary formations of Cretaceous age, including the Graneros Shale, Greenhorn Limestone, Carlile Shale, Niobrara Formation, Pierre Shale, Fox Hills Sandstone, and Laramie Formation, and parts of the Arapahoe/Denver/Dawson Formations. The western boundary corresponds to the contact between the Graneros Shale and the underlying Dakota Sandstone on the eastern dip slope of the hogback ridge or near Golden where these units are missing due to faulting, to the mapped location of the Golden Fault. The eastern boundary corresponds roughly to the eastern extent of bedrock which dips at greater than 30 degrees from horizontal. Bedrock layers underlying the DDBA dip to the east or northeast at 30 to 90 degrees from horizontal. The map does not show internal contacts between different bedrock formations, nor does it attempt to delineate areas of natural alluvial deposits that may cover and significantly reduce the heaving potential of the bedrock. Data is in State Plane Grid Coordinates, Colorado Central Zone, NAD83. The extents of the Dipping Bedrock Overlay zone district was established by the Board of County Commissioners by Resolution CC95-134, dated April 11, 1995 and recorded at reception number F0042928 in the records of the Jefferson County Clerk and Recorder, Golden, Colorado. This zone district overlays that portion of any other zone district located in the designated dipping bedrock area and are supplementary to the regulations imposed on the same lands by any underlying zone district or other overlay district. REQUIRED: The name of an organization or individual that developed the data set. REQUIRED: The date when the data set is published or otherwise made available for release. JEFFCO.DippingBedrock JEFFCO.DippingBedrock vector digital data withheld REQUIRED: The basis on which the time period of content information is determined. REQUIRED: The year (and optionally month, or month and day) for which the data set corresponds to the ground. REQUIRED: The state of the data set. REQUIRED: The frequency with which changes and additions are made to the data set after the initial data set is completed. -105.278678 -105.074298 39.914208 39.489039 3062462.837147 3119419.855122 1603289.621958 1757962.167927 REQUIRED: Reference to a formally registered thesaurus or a similar authoritative source of theme keywords. REQUIRED: Common-use word or phrase used to describe the subject of the data set. REQUIRED: Restrictions and legal prerequisites for accessing the data set. REQUIRED: Restrictions and legal prerequisites for using the data set after access is granted. Feature Class Esri ArcGIS 13.3.4.52636 DippingBedrock 3062462.837147 3119419.855122 1757962.167927 1603289.621958 1 -105.278678 -105.074298 39.914208 39.489039 1 1 -105.278678 -105.074298 39.914208 39.489039 The extents of the Dipping Bedrock Overlay zone district was established by the Board of County Commissioners by Resolution CC95-134, dated April 11, 1995 and recorded at reception number F0042928 in the records of the Jefferson County Clerk and Recorder, Golden, Colorado. This zone district overlays that portion of any other zone district located in the designated dipping bedrock area and are supplementary to the regulations imposed on the same lands by any underlying zone district or other overlay district. <DIV STYLE="text-align:Left;"><DIV><DIV>Data Type: Static. Vintage: Per Board of County Commissioners (BCC) resolution CC95-134, dated April 11, 1995.The Designated Dipping Bedrock Area (DDBA) defines an area of Jefferson county where heaving bedrock is possible under certain geological and human-influenced conditions. Special consideration is warranted in all phases of development including site exploration and evaluation, facilities design, construction, and subsequent maintenance. In some areas, avoidance may be the best mitigation method.Heaving Bedrock Geological HazardHistorically, a high rate of damage to roads, utilities, and lightly loaded structures has occurred where steeply dipping beds of expansive claystone bedrock is found near the ground surface. In such areas, ridges of “heaving bedrock”, as large as two feet high, several tens of feet wide, and several hundreds of feet long have been mapped. The ridges form where adjacent, dipping layers of bedrock, each possessing a different potential for expansion, are exposed to water. Damage from heaving bedrock typically is seen within ten years after development and ground deformations may continue for year or decades. This geological hazard is responsible for tens of millions of dollars in excess of maintenance costs to county taxpayers and homeowners. Compared to damage caused by flat-lying expansive soils and bedrock, which are found to the east over much of the Denver metropolitan area, heaving bedrock problems are more complex in nature and difficult to predict, and the resulting damage is often more localized and destructive.Considerations for Proposed and Existing SubdivisionsThe Designated Dipping Bedrock Area (DDBA) contains many areas where geological conditions are favorable for development, and where satisfactory performance of homes and other facilities has occurred. Detailed geological/geotechnical investigations should be conducted for proposed developments within the DDBA to delineate areas where favorable conditions occur, such as thick alluvial soils or layers of nonexpansive bedrock. Special mitigative designs must be employed where zones of potentially heaving bedrock are encountered. Existing subdivisions are not subject to most of the overlay district regulations. However, large additions of remedial structural repair work may be subject to minimum foundation design standards and special review by the Building Department. Potential home buyers should be aware that the distribution of areas of damage within the DDBA may be erratic. A home that exhibits structural damage may be located next to other homes that have no damage. When purchasing an existing home within the map area, or any other expansive soil area, the buyer should have a structural engineer conduct a detailed evaluation of the home to ensure that it is structurally sound.Geology and BoundariesThe DDBA contains eight sedimentary formations of Cretaceous age, including the Graneros Shale, Greenhorn Limestone, Carlile Shale, Niobrara Formation, Pierre Shale, Fox Hills Sandstone, and Laramie Formation, and parts of the Arapahoe/Denver/Dawson Formations. The western boundary corresponds to the contact between the Graneros Shale and the underlying Dakota Sandstone on the eastern dip slope of the hogback ridge or near Golden where these units are missing due to faulting, to the mapped location of the Golden Fault. The eastern boundary corresponds roughly to the eastern extent of bedrock which dips at greater than 30 degrees from horizontal. Bedrock layers underlying the DDBA dip to the east or northeast at 30 to 90 degrees from horizontal. The map does not show internal contacts between different bedrock formations, nor does it attempt to delineate areas of natural alluvial deposits that may cover and significantly reduce the heaving potential of the bedrock. Data is in State Plane Grid Coordinates, Colorado Central Zone, NAD83.</DIV></DIV></DIV> area BCC bedrock clay claystone county damage DDBA designated designation destruction dipping expand expansive geologic geology ground hazard heaving Jefferson land overlay resolution sandstone shale soil surface water zone zoning. dipping bedrock expansive soils geologic hazard dipping bedrock overlay dipping bedrock zone The geological boundaries are derived from the following U.S. Geological Survey 1:24,000 geological quadrangle maps: Eldorado Springs (Wells, 1967; Bull. 1221-D), Louisville (Spencer, 1961; GQ-151), Ralston Buttes (Sheridan et al., 1967; P.P. 520), Golden (Van Horn, 1972; I-761-A), Morrison (Scott, 1972; I-790-A), Fort Logan (Lindvall, 1978; GQ-1427), Indian Hills (Bryant et al., 1973; GQ-1073), Littleton (Scott, 1972; Bull. 1121-L), and Kassler (Scott, 1963; P.P. 421-B). <DIV STYLE="text-align:Left;"><DIV><DIV>There are no access and use limitations for this item.</DIV></DIV></DIV> ISO 19115 Geographic Information - Metadata DIS_ESRI1.0 dataset Downloadable Data 002 withheld Feature Class File Geodatabase Feature Class Vector Simple FALSE 0 TRUE FALSE GCS_North_American_1983 NAD_1983_StatePlane_Colorado_Central_FIPS_0502_Feet coordinate pair survey feet 0.000328 0.000328 North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 Explicit elevation coordinate included with horizontal coordinates 1.000000 NAD_1983_StatePlane_Colorado_Central_FIPS_0502_Feet EPSG 6.18.3(9.3.1.2) 0 DippingBedrock Feature Class 0 OBJECTID OBJECTID OID 4 0 0 Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. SHAPE Shape Geometry 0 0 0 Feature geometry. ESRI Coordinates defining the features. Shape_Length Shape_Length Double 8 0 0 Length of feature in internal units. Esri Positive real numbers that are automatically generated. Shape_Area Shape_Area Double 8 0 0 Area of feature in internal units squared. Esri Positive real numbers that are automatically generated.