State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher) 20051231 2005 vector digital data Hartford, Connecticut, USA State of Connecticut, Department of Environmental Protection The State of Connecticut, Department of Environmental Protection is the collector of the data (compiler), the creator and maintainer of the data layer (editor), and producer (publisher) of this information for use. Data compiled at 1:24,000 scale. http://www.ct.gov/deep Mary DiGiacomo-Cohen 20051231 document Groton, Connecticut, USA Long Island Sound Resource Center The erosion-sites data layer is part of a Statewide GIS Analysis and Mapping of the Geologic Conditions Contributing to Eroding Terrace Escarpments, Project #03-02 of the Nonpoint Source Management Grant Program, funded under Section 319 (h) of the Federal Clean Water Act, and administered by the Connecticut Department of Environmental Protection. Connecticut Erosion Sites is a site specific, point feature-based layer developed at 1:24,000-scale that includes decriptive information regarding the character of the erosion (severity, slope, geologic factors) at selected locations through out the state. The layer is based on information collected and compiled during October-December, 2005 while field testing the applicability of the Erosion Susceptilibity layer developed as part of Project #03-02 Statewide GIS Analysis and Mapping of the Geologic Conditions Contributing to Eroding Terrace Escarpments. The layer represents conditions at a particular point in time. The layer includes 83 locations and descriptive attributes (site name, severity of erosion, description, etc) as well as attributes from a spatial join with merged soils and quaternary geology layers. Features are point locations that represent the selected study areas within the state; it is NOT a comprehensive inventory of erosion locations. Data is compiled at 1:24,000 scale. This data is not updated. Connecticut Erosion Sites is a site specific data layer developed at 1:24,000-scale. The purpose of this layer is show locations and provide desriptions of erosion sites used to confirm the applicability of the draft erosion suscepibility map. Erosion sites were inventoried in selected areas of the state wide study area. This map should be used in conjunction with the final 1:24,000 scale Erosion Susceptibility layer and other documents developed for the Project #03-02: Statewide GIS Analysis and Mapping of the Geologic Conditions Contributing to Eroding Terrace Escarpments. The objective of this project is to identify the geologic conditions that lead to eroding terrace escarpments throughout the state. This layer is part of an information package that can be used as a planning and management tools by state and municipal officials. Not intended for maps printed at map scales greater or more detailed than 1:24,000 scale (1 inch = 2,000 feet.) For additional information, refer to Statewide GIS Analysis and Mapping of the Geologic Conditions Contributing to Eroding Terrace Escarpments, Project #03-02 Final Report, prepared by Mary L. DiGiacomo-Cohen, Long Island Sound Resource Center, University of Connecticut, Avery Point, Groton, CT 06340 in conjunction with North Central Conservation District, 24 Hyde Ave., Vernon, CT, 06066. Report prepared for Nonpoint Source Management Grant Program, Funded under Section 319 (h) of the Federal Clean Water Act, administered by the Connecticut Department of Environmental Protection. 20051231 publication date Complete None planned -73.177488 -71.813630 42.024793 41.285074 None Erosion Soils Quaternary Geology Stratified Deposits Terrace Escarpments Sedimentation Siltation ISO 19115 Topic Category geoscientificInformation None Connecticut River Thames River Housatonic River Quinebaug River Farmington River Salmon River U.S. Department of Commerce, 1987, Codes for the Identification of the States, the District of Columbia and the Outlying Areas of The United States, and Associated Areas (Federal Information Processing Standard 5-2): Washington, DC, National Institute of Standards and Technology. Connecticut CT U.S. Department of Commerce, 1995, Countries, Dependencies, Areas of Special Sovereignty, and Their Principal Administrative Divisions (Federal Information Processing Standard (FIPS) 10-4): Washington, D.C., National Institute of Standards and Technology. United States of America USA None. The data is in the public domain and may be redistributed. No restrictions or legal prerequisites for using the data. The data is suitable for use at appropriate scale, and is not intended for maps printed at scales greater or more detailed than 1:24,000 scale (1 inch = 2,000 feet). Although this data set has been used by the State of Connecticut, Department of Environmental Protection, no warranty, expressed or implied, is made by the State of Connecticut, Department of Environmental Protection as to the accuracy of the data and or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the State of Connecticut, Department of Environmental Protection in the use of these data or related materials. The user assumes the entire risk related to the use of these data. Once the data is distributed to the user, modifications made to the data by the user should be noted in the metadata. When printing this data on a map or using it in a software application, analysis, or report, please acknowledge the State of Connecticut, Department of Environmental Protection as the source for this information. For example, include the following data source description when printing this layer on a map: Erosion_severity from the Erosion_sites layer, compiled and published by CT DEP. Source map scale is 1:24,000. State of Connecticut, Department of Environmental Protection mailing and physical address

79 Elm Street

Hartford Connecticut 06106-5127 USA 860-424-3540 860-424-4058 dep.gisdata@ct.gov Monday to Friday, 08:30 to 16:30 Eastern Standard Time http://www.cteco.uconn.edu/metadata/dep/browsegraphic/erosionsusceptibilitypolypointfullview.gif Full view of Connecticu Erosion Sites shown with Connecticut Erosion Susceptibility in the background. These are sites where detailed descriptions of erosion conditions was used to confirm the applicability of the draft erosion susceptibility data. GIF http://www.cteco.uconn.edu/metadata/dep/browsegraphic/erosionsusceptibilitypolypointdetailview.gif Detailed view of Connecticu Erosion Sites shown with Connecticut Erosion Susceptibility in the background. These are sites where detailed descriptions of erosion conditions was used to confirm the applicability of the draft erosion susceptibility data. GIF These data are maintained by the State of Connecticut using ArcGIS software developed by Environmental Systems Research Institute (ESRI) in a Microsoft Windows operating system environment. The erosionsites layer retains the feature types and information identified by the State of Connecticut, Department of Environmental Protection and obtained from the data compiler. All attributes have valid values. Values are within defined domains. The accuracy test for the attribute values was conducted by comparing the information presented in the source data with 1:24,000-scale field sheets and interactive displays of the data on a computer graphic system. These check plot maps and computer displays depicted and labeled the erosionsites features in different colors based on values for comparison with the original data source. AV_LEGEND and IMS_LEGEND are broad classifications of erosionsites features. AV_LEGEND, and IMS_LEGEND were not manually entered. These additional fields were populated by calculating values equal to existing fields. Erosionsites features were manually selected and populated with descriptive attributes values to (uniquely) identify and describe individual features. Attributes respresenting geologic and soils conditions for each sites, and erosion category were populated by spatial join. Point features conform to the following topological rules. Points are single part. There are no duplicate points. Points do not overlap. Establishment of logical consistency was performed by the State of Connecticut, Department of Environmental Protection using ESRI ArcGIS software to manually create and control feature topology in shapefile format. No automated procedures or tests were performed to guarantee desired topology other than visual inspection. The completeness of the data reflects the feature content of the data sources, which include the FIELD DATA SHEETS for the project. The erosionsites layer is complete in the sense that it accurately reflects the contents of the Erosion sites field information available at the time the State of Connecticut, Department of Environmental Protection created the layer. However, compared to current conditions, the erosionsites layer is incomplete. This data is not updated. The horizontal positional accuracy of this data complies with the United States National Map Accuracy Standards for 1:24,000 scale maps. According to this standard, not more than 10 percent of the locations tested are to be in error by more than 1/50 inch (40 feet) measured on the publication scale of a USGS 7.5 minute topographic quadrangle map. Some feature locations were interpolated from the transporation features, surface water features, elevation contours, buildings, and built-up areas depicted on USGS 7.5 minute topographic quadrangle maps. Other feature locations were derived from GPS coordinates; their horizontal precision exceeds the map standard.Typically, the Trimble Pro XR collects data with the PDOP set to 6.0 and the S/N set to 10.0 the standard error of the collected data is less than 1 meter, so the 95% confidence is on the order of 2 meters. Point features represent approximate positions for linear or large area objects or observations that are transient, variable or temporal in nature. Some features are accurately positioned because GPS-based coordinates were collected at the actual location of the site in the field, and other features are less accurately positioned because the site represents a large area which was interpolated from topographic quadrangle maps. State of Connecticut, Department of Environmental Protection 2005 map Hartford, Connecticut State of Connecticut, Department of Environmental Protection field sheets consist of draft erosion susceptibility map overprinted on DRG topographic quads at 1:24,000 scale 24000 paper 2005 publication date field map field sheets consist of draft erosion susceptibility map overprinted on DRG topographic quads at 1:24,000 scale State of Connecticut, Department of Environmental Protection Unpublished Material vector digital data Hartford, Connecitcut, USA State of Connecitcut, Department of Environmental Protection http://www.ct.gov/deep 24000 disc unknown ground condition gps.shp GPS.shp is in Shapefile format. Mary DiGiacomo-Cohen Unknown vector digital data Groton, Connecticut, USA Long Island Sound Resource Center 24000 disc unknown ground condition eunion.shp union of soils and quaternary geology data layers State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher) 20051231 vector digital data Hartford, Connecticut, USA State of Connecticut, Department of Environmental Protection http://www.ct.gov/deep 24000 disc 20051231 publication date Erosion_Susceptibility_Sites.shp Erosion_Susceptibility_Sites.shp is in Shapefile format. State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher) 20051231 vector digital data Hartford, Connecticut, USA State of Connecticut, Department of Environmental Protection http://www.ct.gov/deep 24000 disc 20051231 publication date Erosion_Susceptibility_Sites Erosion_Susceptibility_Sites is in GeoDatabase Feature Class format. Feature digitizing and attribution (heads up digitizing method) - Using ESRI ArcView 3 software, features appearing on the source map were manually digitized on the screen (heads-up digitizing) at display scales greater than 1:24,000 using USGS 7.5 minute topographic quadrangle maps displayed in the background for reference. Individual features were digitized based on topographic base information. Features were assigned attribute values based on information shown on the field maps. Feature location and attribute accuracy was visually checked and inspected by symbolizing and labeling features according to attribute value on the computer screen and comparing this information to the orginal source data. field map 2005 Erosion_Susceptibility_Sites.shp Long Island Sound Resource Center Mary DiGiacomo-Cohen mailing and physical address

UConn Avery Point

1080 Shennecossett Rd

Groton CT 06340 USA 860 405-9015 lisrc@uconn.edu Erosion locations were captured with a Trimble Pro XR backpack GPS unit. The unit's filters were set to capture points with a PDOP of < 10.0 and a S/N (signal to noise ration) of greater > 1.0. The data was post processed against a base station and then exported into ArcView shape files using the Connecticut State Plane NAD 83 coordinate system. Features were copied to erosionsites.shp and assigned attribute values based on information shown on the field maps and field logs. Feature location and attribute accuracy was visually checked and inspected by symbolizing and labeling features according to attribute value on the computer screen and comparing this information to the orginal source data. gps.shp 2005 Erosion_Susceptibility_Sites.shp State of Connecticut, Department of Environmental Protection Thomas Nosal mailing and physical address

79 Elm St

Hartford CT 06106-5127 USA (860) 424-3590 Attribute enhancements - a spatial join was used to add attributes from a data layer respresenting the union of soils and quaternary geology (which was dissolved to create Erosion Susceptibilty layer). Additionally the AV_LEGEND attribute was added to establish a very general classification scheme for symbolizing features. eunion.shp 2005 Erosion_Susceptibility_Sites.shp Long Island Sound Resource Center Mary DiGiacomo-Cohen mailing and physical address

UConn Avery Point

1080 Shennecossett Rd

Groton CT 06340 USA 860 405-9015 lisrc@uconn.edu Convert to GeoDatabase Feature Class format - Defined new Feature Class named Erosion_Susceptibility_Sites; and imported the attribute definitions, loaded features and imported metadata from Erosion_Susceptibility_Sites.shp shapefile. Spatial Reference Properties for Feature Class: Coordinate System: NAD_1983_StatePlane_Connecticut_FIPS_0600_Feet XY Domain MinX: 100000; MaxX: 2247483.645 XY Domain MinY: 200000; MaxY: 2347483.645 Precision: 1000 Erosion_Susceptibility_Sites.shp 20061108 Erosion_Susceptibility_Sites State of Connecticut, Department of Environmental Protection Howie Sternberg mailing and physical address

79 Elm Street

Hartford Connecticut 06106 USA 860-424-3540 State of Connecticut, United States of America Vector Entity point 83 Lambert Conformal ConicLambert Conformal Conic41.20000041.866667-72.75000040.833333999999.999996499999.999998 coordinate pair 0.000250 0.000250 survey feet North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 1.000000 Explicit elevation coordinate included with horizontal coordinates Connecticut Erosion Sites Erosion sites represented as point features. State of Connecticut, Department of Environmental Protection OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. SHAPE Feature geometry. ESRI Coordinates defining the features. COMMENT Site identifier or casual name compiler text value EROSION_SE Erosion severity compiler text value subjective as observed by compiler DESCRIP brief decription of site conditions, geologic observations compiler text value subjective as seen by compiler TOWN Town Name compiler text value VISIT_DATE date of site visit YYYYMMDD compiler Coordinates defining the features. 20051018 20051219 LOCATION source of location data compiler topo map digitized point location based on topographic base map features compiler GPS point location from Trimble Pro XR unit/software compiler PHOTO1ID file name of first photo of this site compiler text value PHOTO2ID file name of second photo of this site compiler text value PHOTO3ID file name of third photo of this site compiler text value PHOTO4ID file name of fourth photo of this site compiler text value AV_LEGEND same as severity of erosion compiler text value QUPOLY_CD Quaternary Geologic polygon code Quaternary Geologic Map of Connecticut and Long Island Sound Basin text value 1:24,000 scale from spatial join with eunion.shp (merged soils and quaternary geology data layers) QUATGEOL Quaternary Geology Quaternary Geologic Map of Connecticut and Long Island Sound Basin text value 1:24,000 scale from spatial join with eunion.shp (merged soils and quaternary geology data layers) DSPOLY_CD Depositional System Code Quaternary Geologic Map of Connecticut and Long Island Sound Basin text value 1:24,000 scale from spatial join with eunion.shp (merged soils and quaternary geology data layers) DEPOSITION Depositional System Quaternary Geologic Map of Connecticut and Long Island Sound Basin text value 1:24,000 scale from spatial join with eunion.shp (merged soils and quaternary geology data layers) SMPOLY_CD Surficial Materials Code Quaternary Geologic Map of Connecticut and Long Island Sound Basin text value 1:24,000 scale from spatial join with eunion.shp (merged soils and quaternary geology data layers) SURFMAT Surficial Materials Quaternary Geologic Map of Connecticut and Long Island Sound Basin text value 1:24,000 scale from spatial join with eunion.shp (merged soils and quaternary geology data layers) MUSYM The symbol used to identify the soil map unit Natural Resources Conservation Service (NRCS) text value 1:24,000 scale from spatial join with eunion.shp (merged soils and quaternary geology data layers) MUNAME Correlated name of the map unit (field name for surveys in progress) Natural Resources Conservation Service (NRCS) text value 1:24,000 scale from spatial join with eunion.shp (merged soils and quaternary geology data layers) MUHELCL The overall Highly Erodible Lands (HEL) classification for the mapunit based on the rating of its components for wind and water HEL classification Natural Resources Conservation Service (NRCS) text value 1:24,000 scale from spatial join with eunion.shp (merged soils and quaternary geology data layers) POINT_X x coordinate ESRI numeric value POINT_Y y coordinate ESRI numeric value EROSION_CA Erosion category compiler 1 Highly erodible soil and coarse grained erodible surficial materials compiler 2 Highly erodible soil and finer grained erodible surficial materials compiler 3 Erodible surficial materials compiler 4 Highly erodible soil compiler 1:24,000 scale from spatial join with eunion.shp (merged soils and quaternary geology data layers) Includes Erosion sites features such as general descriptions, geologic and soils conditions at selected erosion locations. Information encoded about these features includes x and y coordinates and standard cartographic symbology classification schemes. Use the AV_LEGEND attribute to symbolize features by type on a map. Use the comment to label features on a map. Additional related attribute data tables are not included with the distributed layer, but are available upon request. Stone, J.R., Schafer, J.P., London, E.H. and Thompson, W.B., 1992, Surficial Materials Map of Connecticut, U.S. Geological Survey special map, 2 sheets, scale 1:125,000. Stone, J.R., Schafer, J.P., London, E.H., DiGiacomo-Cohen, M.L., Lewis, R.S. and Thompson, W.B., 2005, Quaternary Geologic Map of Connecticut and Long Island Sound Basin, U.S. Geological Survey Scientific Investigaions Map 2784, 2 sheets, scale 1:125,000. State of Connecticut, Department of Enviromental Protection mailing and physical address

79 Elm Street

Hartford Connecticut 06106-5127 USA 860-424-3540 860-424-4058 dep.gisdata@ct.gov Monday to Friday, 08:30 to 16:30 Eastern Standard Time Connecticut Erosion Sites Although this data set has been used by the State of Connecticut, Department of Environmental Protection, no warranty, expressed or implied, is made by the State of Connecticut, Department of Environmental Protection as to the accuracy of the data and or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the State of Connecticut, Department of Environmental Protection in the use of these data or related materials. The user assumes the entire risk related to the use of these data. Once the data is distributed to the user, modifications made to the data by the user should be noted in the metadata. Shapefile, Feature Class ArcGIS Zip file http://www.ct.gov/deep An online copy of the data may be accessed without charge. The data distributor does not provide custom GIS analysis or mapping services. Data is available in a standard format and may be converted to other formats, projections, coordinate systems, or selected for specific geographic regions by the party receiving the data. Geographic information sytem (GIS), computer-aided drawing or other mapping software is necessary to display, view and access the information. 20111208 Long Island Sound Resource Center, a partnership between the State of Connecticut, Department of Environmental Protection and the University of Connecticut Mary L. DiGiacomo-Cohen mailing and physical address

Long Island Sound Resource Center, UConn Avery Point, 1080 Shennecossett Rd.

Groton CT 06340 USA (860) 405-9015 lisrc@uconn.edu FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile