California Department of Conservation, Office of Mine Reclamation, Abandoned Mined Lands Unit 20010605 1.0 vector digital data Topographically Occurring Mine Symbols (TOMS) Lines http://www.consrv.ca.gov/OMR/abandoned_mine_lands/toms/index.htm toms_line Mining feature symbols digitized from 1:24000 scale, 7.5 minute USGS topographic quadrangles as scanned by the Stephen P. Teale Data Center (July, 1998). To develop a statewide digital spatial dataset of accurately located mining features. Other digital datasets covering the state are limited to mining operations (or claims) but do not locate physical features resulting from mining. en unknown 1998 publication date Complete Annually -125.0 -114.0 42.0 32.5 -237118.739906302577.802387-473102.807624376333.880256 None Mine MEAR332 None None Office of Mine Reclamation mailing and physical address

801 K St., MS 09-06

Sacramento CA 95814 USA 916-323-9198 916-322-4862 omr@consrv.ca.gov 8-5, M-F Eric Miller, John Mistchenko, Sarah Reeves, Mike Tuffly, Consumnes College, Shasta College, University of California at Davis, Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 8.3.0.800 Shapefile Ten percent of the quads were sampled for omission and attribute accuracy. From the sampled population, there were approximately ten percent errors on the attributes and ten percent on omission. All found errors were corrected. Logical consistency was insured by ocular inspection. No specific systematic tests were employed. Data is statewide in extent. Coverage varies from quadrangle to quadrangle due to revisions of the source maps. Positional accuracy is reliant on the accuracy of the original source maps. USGS topographic quadrangles typically state that the maps comply with national map accuracy standards. Human digitization of the mining symbols has likely added slight deviations from the original source map, though no formal method has been undertaken to quantify this additional error. Stephen P. Teale Data Center 1998 raster digital data Sacramento, CA Stephen P. Teale Data Center 24000 CD-ROM 1996 1998 publication date trimdrg All data in the dataset is derived from the 1:24,000 7.5-minute USGS topographic quadrangles. See trimdrg1.txt for source metadata Each DRG covering a quadrangle was visually inspected for mining features (as markers, lines or areas). Features were digitized from the DRG's and attributes were completed concurrently. The feature layers for each quadrangle were then merged to form a statewide dataset. Several quality control inspections were undertaken to identify errors of omission, comission and positional errors. Such errors have been corrected where identified. trimdrg 2001 Vector String 92 SimplePolylineFALSE92FALSEFALSE Albers Conical Equal Area 34 40.5 -120 0 0 -4000000 coordinate pair 5.0 5.0 meters North American Datum of 1927 (CONUS) Clarke 1866 6378206.4 294.978698213898 toms_line Attributes of linear mine features as they exist on USGS 7.5-minute (1:24000) topographic quadrangles. Office of Mine Reclamation Feature Class92 FID Internal feature number. 1 96 1 Sequential unique whole numbers that are automatically generated. Attribute_Type: Integer Attribute_Width: 11 FIDOID400ESRI Shape Feature geometry. 00000A1 90180Z9 Coordinates defining the features. Attribute_Type: String Attribute_Width: 7 ShapeGeometry000ESRI LENGTH The type of mining feature as depicted on the 7.5-minute quadrangle. Asphalt Pit Asphalt Pit Borrow Pit Borrow Pit Building Building Cave Sometimes used interchangeably with "Mine Tunnel", though typical refers to a natural geologic feature. Cinder Pit Cinder Pit Clay Pit Clay Pit Conveyor Used to represent some type of mining infrastructure for moving mined materials. Dam Dam Diggings Area of surface mined land. Sometimes used to refer to hydraulic mine sites. Dredger Tailings Waste material from dredge mining operations. Electrical Electric transmission infrastructure. Gravel Pit Gravel pit mines. The markings are the same as sand, clay and borrow pits. Historical Marker Historical marker. Intricate Surface Area Area of non-specific surface mined land. Lava Tube Lava tube Mill Site Area of milling operations. Mine Dump Usually used to refer to waste rock. Mine Shaft Vertical opening to underground mine workings. Mine Tunnel Horizontal opening to underground mine workings. Commonly used to depict "adits" or "portals". Mineral Location Area where a mineral resource has been identified. Open Pit Surface mined land. Distinguished from a "Quarry" by a notation on the map. Other Unknown mining feature. Pipe Pipe Placer Diggings See "Diggings" Placer Tailings Simlar to "Diggings". Prospect Area of mineral exploration. Quarry Surfaced mined area. The point symbol is the same as an "Open Pit". Sand Pit Surface mined area where the commodity was identified as sand. See also, "Borrow Pit", "Clay Pit" and "Gravel Pit". Spring Spring. Stockpile Usually indicates an ore stockpile. Strip Mine Surfaced mined area. See also "Intricate Surface Area". Tailings Waste material following milling or other processing. Tailings Pond Area used to deposit mill tailings that were in the form of a slurry. Tank Any type of tank for holding liquids. Tramway Aerial conveyor system. Trench A small excavation. Tunnel Similar to "Mine Tunnel", but labeled as a "Tunnel". Attribute_Type: String Attribute_Width: 25 LENGTHNumber8 USGSCODE Name of the mine site as depicted on the 7.5-minute topographic map. Unlabeled sites were designated "Unknown". USGS Any text. Attribute_Type: String Attribute_Width: 50 USGSCODEString7 QUADNAME Length of the linear feature System generated 0 12000 meters QUADNAMEString27 TYPETYPEString25MINENAMEMINENAMEString50IDIDNumber5 Office of Mine Reclamation mailing and physical address

801 K St., MS 09-06

Sacramento CA 95814 USA 916-323-9198 916-322-4862 omr@consrv.ca.gov 8-5, M-F TOMS The Department of Conservation makes no warranties as to the suitability of this product for any particular purpose. 0.1520.152 20040203 Office of Mine Reclamation mailing and physical address

801 K St., MS 09-06

Sacramento CA 95814 USA 916-323-9198 omr@consrv.ca.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 enlocal timehttp://www.esri.com/metadata/esriprof80.htmlESRI Metadata Profile {589D8049-1839-40DF-BDE8-9A5E6CDAD6E5}2003070709485800FALSE20040203135216002004020313521600Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 8.3.0.800toms_line-237118.739906302577.802387376333.880256-473102.8076241ISO 19115 Geographic Information - MetadataDIS_ESRI1.0dataset002file://\\KERNCOG02\SYS\GIS\Unprocessed\Chris\Kern_MEAR\Final\Mineral_Resources_Energy\toms_line.shpLocal Area Network0.152Shapefile9220040203