USGS Data Series 475 Bathymetry and Near-River Topography of the Naches and Yakima Rivers at Union Gap and Selah Gap, Yakima County, Washington, August 2008

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Data Series 475

Prepared in cooperation with Yakima County

Bathymetry and Near-River Topography of the Naches and Yakima Rivers at Union Gap and Selah Gap, Yakima County, Washington, August 2008

By M.C. Mastin and R.L. Fosness

Figures

Figure 1. Surveyed area of the two mountain-range gaps, Union Gap and Selah Gap, near the cities of Selah, Yakima, and Union Gap, Washington.

Figure 2. A base station, designation GP39082-23, on a rocky ledge in the Selah Gap near Yakima, Washington.

Figure 3. Collection of an elevation point using a hand-held global positioning system (GPS) device in shallow water near the confluence of the Naches and Yakima Rivers near Yakima, Washington, 2008.

Figure 4. Method used to calculate elevation of the channel bottom above the vertical datum during boat surveys.

Figure 5. Boat survey points in the upstream part of the Selah Gap survey near Selah, Washington, 2008.

Figure 6. Walking survey points in the river reaches of the Selah Gap near Selah, Washington, 2008.

Figure 7. Walking survey points in the river reach of the Union Gap near Union Gap, Washington, 2008.

Figure 8. Echo-sounding data for ship track 000_1206 on the Yakima River near the confluence with the Naches River near Yakima, Washington, 2008.

Figure 9. Echo-sounding data for ship track 043_1252 on the Yakima River at the Union Gap near Union Gap, Washington, 2008.

Figure 10. Boat survey points on the Naches and Yakima Rivers in and near the Selah Gap near Yakima, Washington, 2008.

Figure 11. Boat survey points on the Yakima River in and near the Union Gap near Union Gap, Washington, 2008.

Report PDF (3.7 MB)

For additional information contact:
Director, Washington Water Science Center
U.S. Geological Survey, 934 Broadway - Suite 300
Tacoma, Washington 98402
http://wa.water.usgs.gov

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