Steven Sobieszczyk 2011 vector digital data Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?nutrientImpaired303d_streams_MRB7 “Under section 303(d) of the 1972 Clean Water Act, states, territories, and authorized tribes are required to develop lists of impaired waters. These impaired waters do not meet water quality standards that states, territories, and authorized tribes have set for them, even after point sources of pollution have installed the minimum required levels of pollution control technology. The law requires that these jurisdictions establish priority rankings for waters on the lists and develop TMDLs for these waters” (U.S. Environmental Protection Agency, 2011). Waterways represented in this data set are a subset of these EPA 303 (d) listed streams that were classified as nutrient impaired. Nutrient impaired streams include those listed for nutrients, agriculture, crop sources, pH, dissolved oxygen, chlorophyll a, nitrate, phosphorus, and nitrogen. Total phosphorus and total nitrogen values attributed to stream reaches are based on EPA Level III Ecoregions aggregations for the National Nutrient Strategy values (U.S. Environmental Protection Agency, 2000). Values are based on 25th percentiles for aggregate nutrient reference conditions for both phosphorus and nitrogen. Data relate to a 2002 time period, with data collected from each of the state agencies as close to that period as possible. See processing steps for more detail on individual state data sets and time periods. Stream reaches represent rivers in the Pacific Northwest that are classified as nutrient impaired by the EPA. Stream reaches are attributed with reporting units of mg/L for both total nitrogen and total phosphorus.Streams correspond to USGS MRB7 (Pacific Northwest) watersheds and were used as a variable in the MRB7 SPARROW model. The base hydrography data set used was the USGS ERF1 hydrography data set (U.S. Geological Survey, 2000). 2002 2004 2008 publication date Complete None planned -127.053324 -110.831100 50.520295 40.079098 none Phosphorus DO 303d contaminants Nitrogen Nutrients inlandWaters pH impaired none Oregon Washington Idaho Montana Nevada Wyoming Columbia River Basin Puget Sound none Since this data set is a combined product of multiple agencies during multiple periods, users are cautioned to be aware of differences in data compilation, resolution, and quality assurance. U.S. Geological Survey Steven Sobieszczyk Hydrologist mailing and physical address

2130 SW 5th Ave.

Portland OR 97201 (503) 251-3208 (503) 251-3470 ssobie@usgs.gov http://water.usgs.gov/GIS/browse/NutrientImpaired303d_streams_MRB7.gif Illustration of Nutrient Impaired 303(d) Streams for the Pacific Northwest GIF Washington Department of Ecology, Oregon Department of Environmental Quality, Idaho Department of Environmental Quality, Montana Department of Environmental Quality, Nevada Division of Environmental Protection, and Wyoming Department of Envrionmental Quality Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.4000 U.S. Environmental Protection Agency Unknown U.S. Environmental Protection Agency 2011 U.S. Geological Survey 2000 2 vector digital data http://water.usgs.gov/GIS/metadata/usgswrd/XML/mrb_e2rf1.xml Data are as accurate as original input source data. See sources cited in processing steps for more information. Linework accuracy corresponds to ERF1 hydrography data set. Attribute accuracy based on 25th percentile from EPA aggregations of Level III ecoregions for the National Nutrient Strategy. All stream reaches were visually inspected during processing. Highest level of consistency possible between different data sources. Data set complete with best availble data for 2002 time period. Where 2002 data non-existent, replaced with nearest available time period data, including 2004 data from Nevada and 2008 data from Washington. N/A N/A Washington Department of Ecology 2008 vector digital data http://www.ecy.wa.gov/services/gis/data/data.htm#w online 2008 ground condition WA303d Washington State's 2008 Water Quality Assessment (WQA) produced in the Environmental Protection Agency's Integrated Report format consisting of both the 303(d) List and the 305(b) Report. Oregon Department of Environmental Quality 2002 vector digital data http://navigator.state.or.us/sdl/data/shapefile/k100/streams303d_02.zip online 2002 ground condition OR303d The Oregon Department of Environmental Quality (DEQ) 2002 Water Quality Assessment (WQA) produced in the Environmental Protection Agency's Integrated Report format consisting of both the 303(d) List and the 305(b) Report. Idaho Department of Environmental Quality 2002 vector digital data http://inside.uidaho.edu/data/IDEQ/strm305b2002_id_ideq/ online 2002 ground condition ID303d The Idaho Department of Environmental Quality (DEQ) 2002 Water Quality Assessment (WQA) produced in the Environmental Protection Agency's Integrated Report format consisting of both the 303(d) List and the 305(b) Report. Montana Department of Environmental Quality 2002 vector digital data online 2002 ground condition MT303d The Montana Department of Environmental Quality (DEQ) 2002 Water Quality Assessment (WQA) produced in the Environmental Protection Agency's Integrated Report format consisting of both the 303(d) List and the 305(b) Report. Nevada Division of Environmental Protection 2004 vector digital data http://ndep.nv.gov/BWQP/file/2004_303d-list_final_epa-approved_nov05.pdf online 2004 ground condition NV303d The Nevada Division of Environmental Protection 2004 Water Quality Assessment (WQA) produced in the Environmental Protection Agency's Integrated Report format consisting of both the 303(d) List and the 305(b) Report. Wyoming Department of Environmental Quality 2002 vector digital data Obtained information from Richard Thorp (rthorp@wyo.gov) online 2002 ground condition WY303d The Wyoming Department of Environmental Quality (DEQ) 2002 Water Quality Assessment (WQA) produced in the Environmental Protection Agency's Integrated Report format consisting of both the 303(d) List and the 305(b) Report. U.S. Geological Survey 2000 2.0 vector digital data ERF1-2 -- Enhanced River Reach File 2.0 Reston, VA U.S. Geological Survey http://water.usgs.gov/GIS/metadata/usgswrd/XML/mrb_e2rf1.xml online 2000 publication date ERF1 National Hydrography Dataset U.S. Environmental Protection Agency Unknown tabular digital data paper unknown publication date EPAECO U.S. Environmental Protection Agency Level III Ecoregions for the National Nutrient Strategy Aquire 303d/305b stream lists from each state with territory in the Pacific Northwest (Columbia River Basin/Coastal streams). Dates of data sets include 2002, 2004, and 2008, see below for specifics. Washington (2008): Department of Ecology; http://www.ecy.wa.gov/services/gis/data/data.htm#w Oregon (2002): Department of Environmental Quality; http://navigator.state.or.us/sdl/data/shapefile/k100/streams303d_02.zip Idaho (2002): Department of Environmental Quality; http://data.insideidaho.org/data/IDEQ/archive/strm305b2002_id_ideq.zip Montana (2002): Department of Environmental Quality Nevada (2004): Division of Environmental Protection; http://ndep.nv.gov/BWQP/file/2004_303d-list_final_epa-approved_nov05.pdf Wyoming (2002): Department of Environmental Quality; Richard Thorp (rthorp@wyo.gov) WA303d OR303d ID303d MT303d NV303d WY303d 20090317 Steven Sobieszczyk U.S. Geological Survey Hydrologist mailing and physical address

2130 SW 5th Ave.

Portland OR 97201 USA (503) 251-3208 (503) 251-3470 ssobie@usgs.gov Using the 303(d) stream lists/shapefiles provided by each state, only streams listed for nutrient were selected for each state. The filtered stream lists/shapefiles included different parameters for each state depending on what was classified. 20090317 The newly filtered nutrient impaired stream lists/shapefiles were compared to the RF1 stream data set. Stream segments from the impaired list were used to select equivalent stream segments from the RF1 data set. For lists (sans shapfile extent), entire stream lengths were selected based on matching stream name and location. Only stream segments from the RF1 that corresponded to those listed or shown in filtered 303(d) lists were exported. ERF1 20090317 Filtered 303(d) nutrient impaired RF1 stream reaches were attributed based on EPA National Nutrient Strategy aggregation by ecoregion. Impaired streams in the Willamette Valley/Central Valleys Ecoregion I were assigned a total phosphorus (mg/L) of 0.047 and a total nitrogen (mg/L) of 0.31. Impaired streams in the Western Forested Mountains Ecoregion II were assigned a total phosphorus (mg/L) of 0.010 and a total nitrogen (mg/L) of 0.12. Impaired streams in the Xeric West Ecoregion III were assigned a total phosphorus (mg/L) of 0.022 and a total nitrogen (mg/L) of 0.38. EPAECO 20090317 Vector NAD_1983_Albers 29.500000 45.500000 96.000000 23.000000 0.00000 0.00000 Coordinate pair 10.00000 10.00000 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 North American Vertical Datum of 1988 30 meters Explicit elevation coordinate included with horizontal coordinates NutrientImpaired303d_streams_MRB7 303d Listed Streams Environmental Protection Agency FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. PNAME Polyline Name (Stream Name) U.S. Geological Survey EFR1 stream network Names defining the streams. MRB_ID Major River Basin ID U.S. Geological Survey EFR1 stream network reach ID MRB_ID erf1 stream network ECO_TN Total Nitrogen (mg/L) EPA level III Ecoregion 0.12 0.38 mg/L ECO_TP Total Phosphorus (mg/L) EPA level III Ecoregion 0.01 0.047 mg/L Total phosphorus and total nitrogent values (mg/L). milligrams per liter U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

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Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html Downloadable Data Although these data have 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. 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. The use of firm, trade, or brand names in this report is for identification purposes only and does not constitute endorsement by the U.S. Geological Survey. The names mentioned in this document may be trademarks or registered trademarks of their respective trademark owners. shapefile PKZIP compression Winzip 1000 http://water.usgs.gov/GIS/dsdl/NutrientImpaired303d_streams_MRB7.zip None. This dataset is provided by USGS as a public service. 20110404 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+nutrientImparied303d_streams_MRB7 FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998