{262009CD-35EA-4662-AF13-F13DDB60EC08}2003110415421500FALSE20040309162147002004030916214700Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 8.2.0.700enA two-week field operation was conducted in the John Day Reservoir on the Columbia River to image the floor of the pool, to measure the distribution and thickness of post-impoundment sediment, and to verify these geophysical data with video photography and bottom sediment samples. The field program was a cooperative effort between the USGS Coastal and Marine Geology Team of the Geologic Division and the USGS Columbia River Research Laboratory of the Biological Resources Division. The data collection was completed aboard the R/V ESTERO during September 13-27, 2000. The interest in sediment accumulation in the reservoir was two-fold. First, it was unknown how effective this reservoir was as a sediment trap to material that otherwise would have been transported down-river to the estuary and eventually to the ocean. The recent erosion of beaches along the Washington coast has been attributed to a decreased contribution of sediment from the Columbia River to the coastal system due to the damming of the river. Second, sediment accumulation on the floors of reservoirs along the Columbia River has been suggested to be diminishing salmon spawning grounds. The extent of changes in habitat since construction of the John Day Dam, however, had not been documented. Common data sets were needed to address both of these questions, and for these reasons this geophysical and sampling program was undertaken. These text files represent the raw navigation acquired on the cruise, including the fathometer data (point bathymetry data) collected on the cruise when available. WARNING: These data have not been checked for errors. No fathometer data was available for julian days 269, 270, and 271.VeeAnn A. Cross2004allgps.txtDavid C. TwichellVeeAnn A. CrossDavid C. Twichell2004Open-File Report2004-1014Woods Hole Science Center, Woods Hole, MAU.S. Geological Surveytabular digital dataground condition2000091520000927CompleteNone planned-120.685-119.32545.93345.688GeneralbathymetryCMGPCoastal and Marine Geology ProgramnavigationOpen-File ReportreservoirU.S. Geological SurveyUSGSWoods Hole Science CenterOF 2004-1014Columbia RiverJohn Day ReservoirJohn Day DamMcNary DamNorth AmericaGeneralUnited StatesLake UmatillanoneThe U.S. Geological Survey must be referenced as the originator of the dataset in any future products or research derived from these data. Text FileVeeAnn A. CrossU.S. Geological SurveyMarine Geologistmailing and physical address

384 Woods Hole Rd.

Woods HoleMA02543-1598(508) 548-8700 x2251(508) 457-2310vatnipp@usgs.govMicrosoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 8.2.0.700allgps.txtenFGDC Content Standards for Digital Geospatial MetadataFGDC-STD-001-1998local timeVeeAnn A. CrossU.S. Geological SurveyMarine Geologistmailing and physical address

384 Woods Hole Rd.

Woods HoleMA02543-1598(508) 548-8700 x2251(508) 457-2310vatnipp@usgs.gov20040309http://www.esri.com/metadata/esriprof80.htmlESRI Metadata ProfileISO 19115 Geographic Information - MetadataDIS_ESRI1.0datasetDownloadable DataThese data were prepared by an agency of the United States Government. Neither the United States government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States government or any agency thereof. Although all data published in this report have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and/or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data, software, or related materials. VeeAnn A. CrossU.S. Geological SurveyMarine Geologistmailing and physical address

384 Woods Hole Rd.

Woods HoleMA02543-1598(508) 548-8700 x2251(508) 457-2310vatnipp@usgs.govASCII002Text File20040309For data collected on julian days 259-267 (Sept. 15-Sept. 23) the navigation recorded with Coastal Oceanographics HYPACK software was reformatted using an AWK script. This text file has a total of 4 columns. Column 1: Date and time (GMT) as julian day(xxx):hour(xx):minute(xx):second(xx) Column 2: Longitude (decimal degrees) Column 3: Latitude (decimal degrees) Column 4: Depth from fathometer (in meters - because the number is negative, subtract 1 meter to account for draft). Julian days 269-271 (Sept. 25 - Sept. 27) GPS data were recorded using BlueMarble's GeoTracker software running within ArcView 3.2. For these days, no fathometer information was merged with the navigation string. An AWK script was used to reformat the navigation so that the text files (jd269.txt, jd270.txt and jd271.txt) have a total of 3 columns. Column 1: Date and time (GMT) as julian day(xxx):hour(xx):minute(xx):second(xx) Column 2: Longitude (decimal degrees) Column 3: Latitude (decimal degrees) 2000VeeAnn A. CrossU.S. Geological SurveyMarine Geologistmailing and physical address

384 Woods Hole Rd.

Woods HoleMA02543-1598(508) 548-8700 x2251(508) 457-2310vatnipp@usgs.govThese text files represent all the raw navigation collected during the 2000 field work in the John Day Reservoir. The initial days (jd259 - jd267) were dedicated to sidescan-sonar and seismic-reflection mapping. The last 3 days (jd269-jd271) was dedicated to sediment sample and bottom photo/video collection.5mThese navigation positions reflect the position of the ship. The accuracy is affected by the fact that the antenna is on a non-stable platform.North American Datum of 1983Geodetic Reference System 806378137.000000298.257222GRS80Decimal degrees