2003110415361800FALSE20040309134735002004030913483100{E26BF9EB-BFE8-4D62-97EE-4487ACE84EAE}Microsoft 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.This navigation file can be brought into ArcView or another GIS to enable correlation between the seismic-reflection profiles in GIF format, and the sidescan-sonar imagery and other features on the lake floor.VeeAnn A. Cross2004jd00_500shtvector digital dataDavid C. Twichell VeeAnn A. CrossDavid C. Twichell2004Open-File Report2004-1014Woods Hole Science Center, Woods Hole, MAU.S. Geological Surveyground condition2000091120000922CompleteNone planned-120.683660-119.32589645.93246145.688597-120.683660-119.32589645.68859745.932461GeneralArcViewchirpCMGPCoastal and Marine Geology Programnavigationseismicseismic-reflectionshapefileshotpointSIS-1000U.S. Geological SurveyUSGSWoods Hole Science CenterreservoirOpen-File ReportOF 2004-1014GeneralNorth AmericaUnited StatesWashingtonOregonColumbia RiverJohn Day ReservoirJohn Day DamMcNary DamLake UmatillanoneThe U.S. Geological Survey must be referenced as the originator of the dataset in any future products or research derived from these data.ShapefileVeeAnn 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 8.2.0.700jd00_500sht-120.68366-119.32589645.93246145.6885971-120.68366-119.32589645.93246145.6885971enFGDC 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 Data0.0520.052SHAPEFILEVeeAnn 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 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.002file://\\REDHOOK\johnday_ofr\data\nav\jd00_500sht.shpLocal Area Network0.052ShapefileVectorSimplePointFALSE374TRUEFALSEEntity point374GCS_North_American_1983Decimal degreesNorth American Datum of 1983Geodetic Reference System 806378137.000000298.257222GCS_North_American_1983374jd00_500shtFeature Class374FIDFIDOID400Internal feature number.ESRISequential unique whole numbers that are automatically generated.ShapeShapeGeometry000Feature geometry.ESRICoordinates defining the features.LONGITUDELONGITUDENumber116Longitudinal position of the point.user defined-120.683902-119.325896LATITUDELATITUDENumber96Latitudinal position of the point.user defined45.68859745.932461LINENUMLINENUMString5String representing the seismic line number that the point belongs to.user definedcharacter setSHOT_NUMSHOT_NUMNumber5Seismic shot number.software generated12082820040309Navigational fixes were recorded in the header of the seismic data. These fixes were stored as eastings and northings in UTM zone 11, NAD83. Approximately every 6th shot has a navigation fixes. These values were placed in DigiRule Geocad and interpolated to a fix every 500 shots. The first and last navigated shot were maintained.These fixes were then reprojected to geographic coordinates, decimal degrees using PROJ v. 4.1.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.govThese point data were then imported into ArcView3.2 as an event theme and converted to a shapefile.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.govAttribute information was added to the shapefile table to better describe each data point.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.govConsistent.These points encompass all the seismic-reflection profiles acquired on this particular cruise.10-20mThe navigational system has an accuracy better than 10m, but because the acquisition system is towed, this reduces the navigational accuracy.