Michael E. Wieczorek Andrew E. LaMotte 2010 tabular digital data Digital Data Series DS-490-25 Reston, Virginia U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?nhd_sgeol This data set represents the area of surficial geology types in square meters compiled for every catchment of NHDPlus for the conterminous United States. The source data set is the "Digital data set describing surficial geology in the conterminous US" (Clawges and Price, 1999). The NHDPlus Version 1.1 is an integrated suite of application-ready geospatial datasets that incorporates many of the best features of the National Hydrography Dataset (NHD) and the National Elevation Dataset (NED). The NHDPlus includes a stream network (based on the 1:100,00-scale NHD), improved networking, naming, and value-added attributes (VAAs). NHDPlus also includes elevation-derived catchments (drainage areas) produced using a drainage enforcement technique first widely used in New England, and thus referred to as "the New England Method." This technique involves "burning in" the 1:100,000-scale NHD and when available building "walls" using the National Watershed Boundary Dataset (WBD). The resulting modified digital elevation model (HydroDEM) is used to produce hydrologic derivatives that agree with the NHD and WBD. Over the past two years, an interdisciplinary team from the U.S. Geological Survey (USGS), and the U.S. Environmental Protection Agency (USEPA), and contractors, found that this method produces the best quality NHD catchments using an automated process (USEPA, 2007). The NHDPlus dataset is organized by 18 Production Units that cover the conterminous United States. The NHDPlus version 1.1 data are grouped by the U.S. Geologic Survey's Major River Basins (MRBs, Crawford and others, 2006). MRB1, covering the New England and Mid-Atlantic River basins, contains NHDPlus Production Units 1 and 2. MRB2, covering the South Atlantic-Gulf and Tennessee River basins, contains NHDPlus Production Units 3 and 6. MRB3, covering the Great Lakes, Ohio, Upper Mississippi, and Souris-Red-Rainy River basins, contains NHDPlus Production Units 4, 5, 7 and 9. MRB4, covering the Missouri River basins, contains NHDPlus Production Units 10-lower and 10-upper. MRB5, covering the Lower Mississippi, Arkansas-White-Red, and Texas-Gulf River basins, contains NHDPlus Production Units 8, 11 and 12. MRB6, covering the Rio Grande, Colorado and Great Basin River basins, contains NHDPlus Production Units 13, 14, 15 and 16. MRB7, covering the Pacific Northwest River basins, contains NHDPlus Production Unit 17. MRB8, covering California River basins, contains NHDPlus Production Unit 18. This spatial data set was created and used by the U.S. Geological Survey (USGS) specifically to estimate surficial geology per watershed segment in the application of the national SPAtially Referenced Regression On Watershed attributes (SPARROW) model . The SPARROW model relates in-stream water-quality measurements to spatially referenced characteristics of watersheds, including contaminant sources and factors influencing terrestrial and stream transport. The model empirically estimates the origin and fate of contaminants in streams, and quantifies uncertainties in these estimates based on model coefficient error and unexplained variability in the observed data. For more information on the USGS SPARROW model please refer to: http://water.usgs.gov/nawqa/sparrow/intro/intro.html. 2002 publication date Complete None planned -127.910792 -65.327751 51.657387 23.243486 None Surficial Geology Inlandwaters NHDPlus Catchment NAWQA SPARROW None Conterminous United States MRB Major River Basin MRB1 NEMA New England and Mid-Atlantic MRB2 SAGT South Atlantic-Gulf and Tennessee MRB3 GLMR Great Lakes, Ohio, Upper Mississippi, and Souris-Red-Rainy MRB4 MORI Missouri MRB5 LMTG Lower Mississippi, Arkansas-White-Red, and Texas-Gulf MRB6 COGB Rio Grande, Colorado, and Great Basin MRB7 PANW Pacific Northwest MRB8 CALI California None None Michael E. Wieczorek US Geological Survey, Maryland Water Science Center Geographer mailing address

5522 Research Park Drive

Baltimore MD 21228 USA 443-498-5550 mewieczo@usgs.gov 8:00am-4:30pm MST Please contact thru email http://water.usgs.gov/GIS/browse/nhd_sgeol_mrb.jpg Surficial Geology overlain with Major River basins. JPG Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3000 Charles G. Crawford Pixie A. Hamilton Anne B. Hoos October 5, 2006 Reston, Virginia U.S. Geological Survey Prepared by Charlie Crawford, Pixie Hamilton, and Anne Hoos for a NAWQA National Liaison Meeting, Washington D.C., October 5, 2006 http:/water.usgs.gov/nawqa/studies/mrb/mrb_factsheet.pdf None None U.S. Environmental Protection U.S. Geological Survey 2007 vector digital data Washington, D.C. U.S. Environmental Protection Agency ftp://ftp.horizon-systems.com/NHDPlus/NHDPlusV1/NewEngland/NHDPlus01V01_01_Catshape.zip online 2007 publication date NHD The source data provided catchments for basin characterization for MRB 1. COMID is the unique item in NHDPlus that relates to the dbf files containing artificial drainage information. U.S. Environmental Protection U.S. Geological Survey 2007 vector digital data Washington, D.C. U.S. Environmental Protection Agency ftp://ftp.horizon-systems.com/NHDPlus/NHDPlusV1/MidAtlantic/NHDPlus02V01_01_Catshape.zip online 2007 publication date NHD The source data provided catchments for basin characterization for MRB 1. COMID is the unique item in NHDPlus that relates to the dbf files containing artificial drainage information. U.S. Environmental Protection U.S. Geological Survey 2007 vector digital data Washington, D.C. U.S. Environmental Protection Agency ftp://ftp.horizon-systems.com/NHDPlus/NHDPlusV1/SouthAtlanticGulf/NHDPlus03V01_02_Catshape.zip online 2007 publication date NHD The source data provided catchments for basin characterization for MRB 2. COMID is the unique item in NHDPlus that relates to the dbf files containing artificial drainage information. U.S. Environmental Protection U.S. Geological Survey 2007 vector digital data Washington, D.C. U.S. Environmental Protection Agency ftp://ftp.horizon-systems.com/NHDPlus/NHDPlusV1/GreatLakes/NHDPlus04V01_01_Catshape.zip online 2007 publication date NHD The source data provided catchments for basin characterization for MRB 3. COMID is the unique item in NHDPlus that relates to the dbf files containing artificial drainage information. U.S. Environmental Protection U.S. Geological Survey 2007 vector digital data Washington, D.C. U.S. Environmental Protection Agency ftp://ftp.horizon-systems.com/NHDPlus/NHDPlusV1/Mississippi/NHDPlus05V01_01_Catshape.zip online 2007 publication date NHD The source data provided catchments for basin characterization for MRB 3. COMID is the unique item in NHDPlus that relates to the dbf files containing artificial drainage information. U.S. Environmental Protection U.S. Geological Survey 2007 vector digital data Washington, D.C. U.S. Environmental Protection Agency ftp://ftp.horizon-systems.com/NHDPlus/NHDPlusV1/Mississippi/NHDPlus06V01_01_Catshape.zip online 2007 publication date NHD The source data provided catchments for basin characterization for MRB 2. COMID is the unique item in NHDPlus that relates to the dbf files containing artificial drainage information. U.S. Environmental Protection U.S. Geological Survey 2007 vector digital data Washington, D.C. U.S. Environmental Protection Agency ftp://ftp.horizon-systems.com/NHDPlus/NHDPlusV1/Mississippi/NHDPlus07V01_01_Catshape.zip online 2007 publication date NHD The source data provided catchments for basin characterization for MRB 3. COMID is the unique item in NHDPlus that relates to the dbf files containing artificial drainage information. U.S. Environmental Protection U.S. Geological Survey 2007 vector digital data Washington, D.C. U.S. Environmental Protection Agency ftp://ftp.horizon-systems.com/NHDPlus/NHDPlusV1/Mississippi/NHDPlus08V01_01_Catshape.zip online 2007 publication date NHD The source data provided catchments for basin characterization for MRB 5. COMID is the unique item in NHDPlus that relates to the dbf files containing artificial drainage information. U.S. Environmental Protection U.S. Geological Survey 2007 vector digital data Washington, D.C. U.S. Environmental Protection Agency ftp://ftp.horizon-systems.com/NHDPlus/NHDPlusV1/SourisRedRainy/NHDPlus09V01_01_Catshape.zip online 2007 publication date NHD The source data provided catchments for basin characterization for MRB 3. COMID is the unique item in NHDPlus that relates to the dbf files containing artificial drainage information. U.S. Environmental Protection U.S. Geological Survey 2007 vector digital data Washington, D.C. U.S. Environmental Protection Agency ftp://ftp.horizon-systems.com/NHDPlus/NHDPlusV1/Mississippi/NHDPlus10LV01_02_Catshape.zip online 2007 publication date NHD The source data provided catchments for basin characterization for MRB 4. COMID is the unique item in NHDPlus that relates to the dbf files containing artificial drainage information. U.S. Environmental Protection U.S. Geological Survey 2007 vector digital data Washington, D.C. U.S. Environmental Protection Agency ftp://ftp.horizon-systems.com/NHDPlus/NHDPlusV1/Mississippi/NHDPlus10UV01_01_Catshape.zip online 2007 publication date NHD The source data provided catchments for basin characterization for MRB 4. COMID is the unique item in NHDPlus that relates to the dbf files containing artificial drainage information. U.S. Environmental Protection U.S. Geological Survey 2007 vector digital data Washington, D.C. U.S. Environmental Protection Agency ftp://ftp.horizon-systems.com/NHDPlus/NHDPlusV1/Mississippi/NHDPlus11V01_01_Catshape.zip online 2007 publication date NHD The source data provided catchments for basin characterization for MRB 5. COMID is the unique item in NHDPlus that relates to the dbf files containing artificial drainage information. U.S. Environmental Protection U.S. Geological Survey 2007 vector digital data Washington, D.C. U.S. Environmental Protection Agency ftp://ftp.horizon-systems.com/NHDPlus/NHDPlusV1/TexasGulf/NHDPlus12V01_02_Catshape.zip online 2007 publication date NHD The source data provided catchments for basin characterization for MRB 5. COMID is the unique item in NHDPlus that relates to the dbf files containing artificial drainage information. U.S. Environmental Protection U.S. Geological Survey 2007 vector digital data Washington, D.C. U.S. Environmental Protection Agency ftp://ftp.horizon-systems.com/NHDPlus/NHDPlusV1/RioGrande/NHDPlus13V01_02_Catshape.zip online 2007 publication date NHD The source data provided catchments for basin characterization for MRB 6. COMID is the unique item in NHDPlus that relates to the dbf files containing artificial drainage information. U.S. Environmental Protection U.S. Geological Survey 2007 vector digital data Washington, D.C. U.S. Environmental Protection Agency ftp://ftp.horizon-systems.com/NHDPlus/NHDPlusV1/Colorado/NHDPlus14V01_01_Catshape.zip online 2007 publication date NHD The source data provided catchments for basin characterization for MRB 6. COMID is the unique item in NHDPlus that relates to the dbf files containing artificial drainage information. U.S. Environmental Protection U.S. Geological Survey 2007 vector digital data Washington, D.C. U.S. Environmental Protection Agency ftp://ftp.horizon-systems.com/NHDPlus/NHDPlusV1/Colorado/NHDPlus15V01_01_Catshape.zip online 2007 publication date NHD The source data provided catchments for basin characterization for MRB 6. COMID is the unique item in NHDPlus that relates to the dbf files containing artificial drainage information. U.S. Environmental Protection U.S. Geological Survey 2007 vector digital data Washington, D.C. U.S. Environmental Protection Agency ftp://ftp.horizon-systems.com/NHDPlus/NHDPlusV1/GreatBasin/NHDPlus16V01_01_Catshape.zip online 2007 publication date NHD The source data provided catchments for basin characterization for MRB 6. COMID is the unique item in NHDPlus that relates to the dbf files containing artificial drainage information. U.S. Environmental Protection U.S. Geological Survey 2007 vector digital data Washington, D.C. U.S. Environmental Protection Agency ftp://ftp.horizon-systems.com/NHDPlus/NHDPlusV1/PacificNorthwest/NHDPlus17V01_02_Catshape.zip online 2007 publication date NHD The source data provided catchments for basin characterization for MRB 7. COMID is the unique item in NHDPlus that relates to the dbf files containing artificial drainage information. U.S. Environmental Protection U.S. Geological Survey 2007 vector digital data Washington, D.C. U.S. Environmental Protection Agency ftp://ftp.horizon-systems.com/NHDPlus/NHDPlusV1/California/NHDPlus18V01_01_Catshape.zip online 2007 publication date NHD The source data provided catchments for basin characterization for MRB 8. COMID is the unique item in NHDPlus that relates to the dbf files containing artificial drainage information. Clawges, Rick M. Price, Curtis V. 1999 map Open-File Report 99-77 Rapid City, SD U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?ofr99-77_geol75m online 1999 publication date sgeol The source data provided information on surficial geology. 1) Downloaded the polygon coverage of Surficial Geology (SGEOL) from http://water.usgs.gov/lookup/getspatial?ofr99-77_geol75m 2) Converted the polygon coverage into a 30-meter GRID to match the resolution of the NHDPlus catchment GRIDs downloaded from http://www.horizon-systems.com/nhdplus. 3) Summarized the area of each surficial geology type per catchment by using the COMBINE command in GRID. The COMBINE command combines the geology and catchment GRIDs into one coverage. The resulting GRID automatically tables the area of each geology type per catchment. 4) Exported results into a dbf file format. 2008 Metadata imported. G:\MRBs\meta\NHDPlus\xml\sgeol_nhd.xml 20100923 09464000 COMID code sgeol dbf tabular data ESRI OID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. COMID Unique ID to relate to the NHDPlus catchments NHDPlus Sequential unique whole numbers that are automatically generated. SGEOL_1 (si) Estimated area in square meters of catchment that contains the surficial geology type Sea Islands. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_2 (cr) Estimated area in square meters of catchment that contains the surficial geology type Coral. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_3 (bm) Estimated area in square meters of catchment that contains the surficial geology type Backshore Deposits. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_4 (pW) Estimated area in square meters of catchment that contains the surficial geology type Pre-Wisconsinan drift. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_5 (tg) Estimated area in square meters of catchment that contains the surficial geology type Till or Ground Moraine. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_6 (ts) Estimated area in square meters of catchment that contains the surficial geology type Ice-Laid Deposits, like tg but mostly sand and silt. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_7 (ts/K,T) Estimated area in square meters of catchment that contains the surficial geology type Thin Ice-Laid Deposits but thin and discontinuous. Extensive exposure of underlying Cretaceous- and Tertiary-age formations. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_8 (mg) Estimated area in square meters of catchment that contains the surficial geology type Deposits of Mountain Glaciers. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_9 (w) Estimated area in square meters of catchment that contains the surficial geology type Gravel, Sand, and Clay deposited by glacial streams adjacent to or downstream from temporary ice fronts. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_10 (al) Estimated area in square meters of catchment that contains the surficial geology type Flood Plain and Alluvium Gravel Terraces. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_11 (fg) Estimated area in square meters of catchment that contains the surficial geology type Fan Gravels. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_12 (fs) Estimated area in square meters of catchment that contains the surficial geology type Fan Sands. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_13 (osg) Estimated area in square meters of catchment that contains the surficial geology type Pliocene-age and older stream deposits on the Great Plains. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_14 (l) Estimated area in square meters of catchment that contains the surficial geology type Lake Deposits. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_15 (s) Estimated area in square meters of catchment that contains the surficial geology type Sand Sheets, mostly with dunes or sand mounds at surface. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_16 (s/osg) Estimated area in square meters of catchment that contains the surficial geology type Sand Sheets on sandy and gravelly Ogallala Formation in southern Great Plains. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_17 (wl) Estimated area in square meters of catchment that contains the surficial geology type Wisconsinan loess. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_18 (es) Estimated area in square meters of catchment that contains the surficial geology type Deeply Weathered loess. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_19 (b) Estimated area in square meters of catchment that contains the surficial geology type Basalt. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_20 (br) Estimated area in square meters of catchment that contains the surficial geology type Bedrock. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_21 (rsh) Estimated area in square meters of catchment that contains the surficial geology type Micaceous Residuum without much quartz; clay, mostly kaolinite. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_22 (rgr) Estimated area in square meters of catchment that contains the surficial geology type Residuum with abundant quartz; less mica than rsh, but equal to clay. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_23 (rga) Estimated area in square meters of catchment that contains the surficial geology type Clay Residuum with little mica or quartz; mostly massive kaolinitic clay. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_24 (rls) Estimated area in square meters of catchment that contains the surficial geology type Red Clay, massive clay that is generally kaolinitic. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_25 (rlc) Estimated area in square meters of catchment that contains the surficial geology type Cherty Red Clay; similar to rls, but with chert from the parent rock. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_26 (rtr) Estimated area in square meters of catchment that contains the surficial geology type Residuum on Triassic-age formations; depths less than most other saprolite, reddish color, largely inherited from parent rock. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_27 (rs) Estimated area in square meters of catchment that contains the surficial geology type Sandy Residuum, derived by intensive weathering of sandstone formations. Sand locally is in dunes. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_28 (rc) Estimated area in square meters of catchment that contains the surficial geology type Clay Residuum that swells when wet; developed by weathering of poorly consolidated shale, containing the clay mineral montmorillonite, generally less than 10 feet. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_29 (rl) Estimated area in square meters of catchment that contains the surficial geology type Loam; texture variable, ranging from sand to clay, mostly non-swelling clay mineral, kaolinite, otherwise similar to rc. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_30 (rg) Estimated area in square meters of catchment that contains the surficial geology type Intensively Weathered upper Tertiary- and Quaternary-age gravels; thickness generally less than 30 feet, distribution not completely known. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_31 (rph) Estimated area in square meters of catchment that contains the surficial geology type Phosphatic Clay; poorly sorted clay and phosphate pebbles or nodules in sandy matrix. Thickness 10-50 feet, commonly overlain by loose sand. Major source ofphosphate fertilizer. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_32 (rsi) Estimated area in square meters of catchment that contains the surficial geology type Sandy or Silty Residuum; probably includes loess. Depth generally less than 10 feet. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_33 (ls) Estimated area in square meters of catchment that contains the surficial geology type Silt on Limestone; probably includes considerable loess; extensive bare rock. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_34 (ss) Estimated area in square meters of catchment that contains the surficial geology type Sandy Ground; mostly on poorly consolidated sandstone formations. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_35 (sh) Estimated area in square meters of catchment that contains the surficial geology type Shaley or sandy ground; on mixed sandstone and shale formations where shaley contains considerable swelling clay. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_36 (gyp) Estimated area in square meters of catchment that contains the surficial geology type Sandy Gypsiferous ground; many sinks, local dunes, vegetation scanty or lacking where there is much gypsum or other salt. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_37 (c) Estimated area in square meters of catchment that contains the surficial geology type Clayey Ground on weathered Permian and/or Triassic-age red beds. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_38 (m) Estimated area in square meters of catchment that contains the surficial geology type Marshes, Swamps, Peat Deposits; only locally thicker than 12 feet. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_39 (gp) Estimated area in square meters of catchment that contains the surficial geology type Sandy Coastal Ground with organic layer over a shallow water table, groundwater podsols. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_40 (co/ss,sh) Estimated area in square meters of catchment that contains the surficial geology type Sandy and Stony Colluvium derived mostly from sandstone and shale. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_41 (co/ls) Estimated area in square meters of catchment that contains the surficial geology type Stony Colluvium on limestone; considerable admixed silt possibly of loess origin. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_42 (co/m) Estimated area in square meters of catchment that contains the surficial geology type Stony Colluvium on metamorphic rocks; less silt and clay than in co/ls. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_43 (co/v) Estimated area in square meters of catchment that contains the surficial geology type Colluvium on volcanic rocks. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_44 (co/gr) Estimated area in square meters of catchment that contains the surficial geology type Bouldery and Sandy Colluvium on granitic rocks. U.S. Geological Survey 0 9899176000.0 Square meters SGEOL_45 (co/c) Estimated area in square meters of catchment that contains the surficial geology type Clayey and loamy Colluvium; on poorly consolidated rocks on lee sides ofPacific Coast Ranges. U.S. Geological Survey 0 9899176000.0 Square meters BASIN_AREA Area of catchment in square meters U.S. Geological Survey 900.0 9899176000.0 Square meters NODATA_ARE Area of catchment that source GRID does not cover in square meters U.S. Geological Survey 0.0 67847890000.0 Square meters COV_PERC Percent of catchment that source GRID covers U.S. Geological Survey 0.0 100.0 Percentage SGEOL_AREA Area of catchment that source GRID covers in square meters U.S. Geological Survey 900.0 9899175000.0 Square meters U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston Virginia 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html Downloadable Data Although this dataset has been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of these data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. dbf Full coverage zipped 3618 KB http://water.usgs.gov/GIS/dsdl/nhd_sgeol_mrb1.zip dbf Full coverage zipped 4047 KB http://water.usgs.gov/GIS/dsdl/nhd_sgeol_mrb2.zip dbf Full coverage zipped 4948 KB http://water.usgs.gov/GIS/dsdl/nhd_sgeol_mrb3.zip dbf Full coverage zipped 8578 KB http://water.usgs.gov/GIS/dsdl/nhd_sgeol_mrb4.zip dbf Full coverage zipped 6633 KB http://water.usgs.gov/GIS/dsdl/nhd_sgeol_mrb5.zip dbf Full coverage zipped 5527 KB http://water.usgs.gov/GIS/dsdl/nhd_sgeol_mrb6.zip dbf Full coverage zipped 3837 KB http://water.usgs.gov/GIS/dsdl/nhd_sgeol_mrb7.zip dbf Full coverage zipped 2224 KB http://water.usgs.gov/GIS/dsdl/nhd_sgeol_mrb8.zip None. This dataset is provided by the USGS as a public service. 20100817 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

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Reston Virginia 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+nhd_sgeol FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998