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These vector contour lines are derived from the 3D Elevation Program using automated and semi-automated processes. They were created to support 1:24,000-scale CONUS and Hawaii, 1:25,000-scale Alaska, and 1:20,000-scale Puerto Rico / US Virgin Island topographic map products, but are also published in this GIS vector format. Contour intervals are assigned by 7.5-minute quadrangle, so this vector dataset is not visually seamless across quadrangle boundaries. The vector lines have elevation attributes (in feet above mean sea level on NAVD88), but this dataset does not carry line symbols or annotation.
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The USGS Wyoming-Montana Water Science Center (WY–MT WSC) completed a report (Sando and McCarthy, 2018) documenting methods for peak-flow frequency analysis following implementation of the Bulletin 17C guidelines. The methods are used to provide estimates of peak-flow quantiles for 50-, 42.9-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance probabilities (AEPs) for selected streamgages operated by the WY–MT WSC. This data release presents peak-flow frequency analyses for 11 selected streamgages in Jefferson County, Montana, that were based on methods described by Sando and McCarthy (2018).
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These vector contour lines are derived from the 3D Elevation Program using automated and semi-automated processes. They were created to support 1:24,000-scale CONUS and Hawaii, 1:25,000-scale Alaska, and 1:20,000-scale Puerto Rico / US Virgin Island topographic map products, but are also published in this GIS vector format. Contour intervals are assigned by 7.5-minute quadrangle, so this vector dataset is not visually seamless across quadrangle boundaries. The vector lines have elevation attributes (in feet above mean sea level on NAVD88), but this dataset does not carry line symbols or annotation.
map background search result map search result map OL1006 Ophiogomphus sp dor post USGS Topo Map Vector Data (Vector) 11188 Dahlgren, Illinois 20210628 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 72103 Woodlawn, Illinois 20210629 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 11759 Deer Parks, Idaho 20200715 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 44992 Three Brothers, Montana 20200721 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 45053 Thunderbolt Creek, Montana 20200722 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 27211 Madras West, Oregon 20200716 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 4153 Black Mountain, Montana 20200722 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 24503 Lake Laurier, Louisiana 20201208 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 31812 New Orleans East, Louisiana 20201208 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 12724 Downs, Georgia 20200914 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 70186 Gladstone, Nebraska 20210715 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 26722 Louisville, Georgia 20200912 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 33246 One Horse Store, Arkansas 20200915 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 37866 Richwoods, Missouri 20210623 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 45088 Tiff, Missouri 20210622 for 7.5 x 7.5 minute FileGDB 10.1 USGS NED 1/3 arc-second Contours for Lincoln E, Nebraska 20210929 1 X 1 degree FileGDB 10.1 USGS NED 1/3 arc-second Contours for Macon E, Georgia 20200914 1 X 1 degree Shapefile USGS Topo Map Vector Data (Vector) 8102 Chamblee, Louisiana 20201209 for 7.5 x 7.5 minute FileGDB 10.1 Results of peak-flow frequency analyses for 11 selected streamgages in Jefferson County, Montana, based on data through water year 2017 USGS Topo Map Vector Data (Vector) 11188 Dahlgren, Illinois 20210628 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 72103 Woodlawn, Illinois 20210629 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 11759 Deer Parks, Idaho 20200715 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 44992 Three Brothers, Montana 20200721 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 45053 Thunderbolt Creek, Montana 20200722 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 27211 Madras West, Oregon 20200716 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 4153 Black Mountain, Montana 20200722 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 24503 Lake Laurier, Louisiana 20201208 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 31812 New Orleans East, Louisiana 20201208 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 12724 Downs, Georgia 20200914 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 70186 Gladstone, Nebraska 20210715 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 26722 Louisville, Georgia 20200912 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 33246 One Horse Store, Arkansas 20200915 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 37866 Richwoods, Missouri 20210623 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 45088 Tiff, Missouri 20210622 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 8102 Chamblee, Louisiana 20201209 for 7.5 x 7.5 minute FileGDB 10.1 Results of peak-flow frequency analyses for 11 selected streamgages in Jefferson County, Montana, based on data through water year 2017 USGS NED 1/3 arc-second Contours for Lincoln E, Nebraska 20210929 1 X 1 degree FileGDB 10.1 USGS NED 1/3 arc-second Contours for Macon E, Georgia 20200914 1 X 1 degree Shapefile