U.S. Geological Survey 2007 vector digital data Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?ofr07-1056_dn_post_bathy.shp Ryan F. Thompson Michaela R. Johnson Michael J. Anderson 2007 U.S. Geological Survey Scientific Investigations Report 2007-1056 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/of/2007/1056/ This geospatial data set contains the points collected by the echosounder on transects in the downstream project reach surrounding the construction area at River Mile 761.4 below Gavins Point Dam on the Missouri River in South Dakota. This survey provides channel cross sections for new and selected existing transects following construction of Emergent Sandbar Habitat near River Mile 761.4 The purpose of this CD is to provide project files and GIS coverages for Task 1 of the Military Interdepartmental Purchase Request to the U.S. Army Corps of Engineers. 2005 ground condition Complete Unknown -96.912030 -96.822611 42.736188 42.701452 None inlandWaters Hydrographic Survey None Missouri River below Gavins Point Dam none The Missouri River is a rapidly changing system. These data should not be used for vessel navigation. U.S. Geological Survey Ryan F. Thompson Hydrologist mailing and physical address

111 Kansas Ave SE

Huron SD 57324 605 352-4241 x225 rcthomps@usgs.gov Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722 The Innerspace Technologies dual-frequency 456 echosounder was calibrated twice daily with bar checks. Vessel draft was measured with each bar check and was used to calculated water depth. A CSI Wireless, Omnistar corrected differential GPS antenna mounted directly above the echosounder was used to collect the horizontal location of each depth measurement. Real-time kinematic GPS was used to measure water surface elevation at each transect, which was then used to calculate elevation of the channel bottom. Conversion to NGVD29 vertical datum was completed so that the data could be compared to existing COE benchmarks and gaging station data. The datum conversion was accomplished using the National Geodetic Survey's VERTCON program (http://www.ngs.noaa.gov/cgi-bin/VERTCON/vert_con.prl). Topologically clean Data points have been checked and attributed Data set was collected in UTM NAD83 Zone 14 meters. Some preliminary editing was completed in Hypack by deleting bad data points. 2004 Edited data was exported from hypack and used to create an ArcGIS Shapefile 2004 Attribute fields were added and populated. Additional bad data points were deleted as necessary. 2004 Data was projected to UTM Zone 14, with units of US feet. 2004 Vector Entity point 11786 Point 4 Transverse Mercator 0.999600 -99.000000 0.000000 1640416.666667 0.000000 coordinate pair 0.000064 0.000064 survey feet North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 National Geodetic Vertical Datum of 1929 0.1 Feet Attribute values Mean sea level 0.1 feet Attribute values ofr07-1056_dn_post_bathy point attribute table ARC/INFO ® GIS Software tran_num Transect number USGS number number indicates transect the data point is associated with U.S. Geological Survey id point identifier U.S. Geological Survey Sequential unique whole numbers that are automatically generated. northing UTM Zone 14 Northing, in US Feet U.S. Geological Survey Northing UTM Zone 14 Northing, in US Feet U.S. Geological Survey easting UTM Zone 14 Easting , in US feet U.S. Geological Survey Easting UTM Zone 14 Easting , in US feet U.S. Geological Survey FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. elevft29 Elevation of the stream bottom, in feet, measured with the National Geodetic Vertical Datum of 1929 U.S. Geological Survey Elevation Elevation of the stream bottom, in feet, measured with the National Geodetic Vertical Datum of 1929 U.S. Geological Survey Shape Feature geometry. ESRI Coordinates defining the features. northing2 UTM Zone 14 Northing, in meters U.S. Geological Survey Northing2 UTM Zone 14 Northing, in meters U.S. Geological Survey easting2 UTM Zone 14 Easting, in meters U.S. Geological Survey Easting2 UTM Zone 14 Easting, in meters U.S. Geological Survey elevm88 Elevation of the channel bottom, in meters, North American Vertical Datum of 1988 U.S. Geological Survey Elev88m Elevation of the channel bottom, in meters, North American Vertical Datum of 1988 U.S. Geological Survey 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+ofr041189it03 Downloadable Data The South Dakota and Nebraska Water Science Centers, the Water Resources Discipline (WRD) of the U.S. Geological Survey, and the U.S. Army Corps of Engineers make no guarantee nor offer any warranty concerning the accuracy, condition, or application of the information contained in these geographic data. The burden for determining fitness for use of this data lies entirely with the user. Although these data have been used successfully on computers of WRD, no warranty, expressed or implied, is made by WRD regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty. In no event shall the WRD have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including , but not limited to, any loss of profits arising out of the delivery, installation, operation, or support by WRD. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. ARCE 0.315 http://water.usgs.gov/GIS/dsdl/dn_post_bathy.zip None 20070306 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+ofr07-1056_dn_post_bathy.shp FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998