Salt -- Cataloging Unit 17040105

• Snake headwaters Accounting Unit 170401
  
• Upper Snake Subregion 1704
  
• Pacific Northwest Region 17 (There are 219 cataloging units in this region.)
  The state composition by area is 55.0% Wyoming, 45.0% Idaho.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 2311.4 km² ( 892.8 mi² ) [% in USA = 28.52, % in Region = 34.25]
  The area from the USGS is 887 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 645)

  IV. Elevation Analysis

  This analysis is based on 923678 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 2216.4 m ( 7271.6 ft ) [% in USA = 96.87, % in Region = 97.72]
  The elevation standard deviation is 302.0 m ( 990.8 ft ) [% in USA = 82.99, % in Region = 48.40]
  The coefficient of variation is 13.6 %.
  The vertical relief is 1575.2 m ( 5167.9 ft ) [% in USA = 77.74, % in Region = 37.44]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	1716.0	1859.0	1937.0	2012.0	2091.9	2180.2	2256.5	2351.7	2456.8	2652.9	3291.2
  feet	5629.9	6099.0	6354.9	6601.0	6863.1	7152.8	7403.1	7715.5	8060.3	8703.6	10797.8

  

  V. Map Line Analysis

  Note- percentiles are for the feature density, not for the raw total lengths.
  

  line type	km	mi	km/km²	mi/mi²	% in USA	% in Region
  Perennial Shoreline	22.2	13.8	0.010	0.015	11.89	12.79
  Intermittent Shoreline	1.7	1.1	0.001	0.001	50.02	66.21
  Perennial Streams	1055.6	656.0	0.457	0.735	77.45	53.42
  Intermittent Streams	985.4	612.4	0.426	0.686	61.25	73.52
  Canals	147.1	91.4	0.064	0.102	87.97	89.04
  1° roads	0.0	0.0	0.000	0.000	30.84	59.82
  2° roads	71.8	44.6	0.031	0.050	58.50	80.37
  3° roads	66.1	41.1	0.029	0.046	29.46	60.27
  4° roads	1149.3	714.3	0.497	0.800	7.15	14.61
  Total Roads	1287.2	800.0	0.557	0.896	8.10	16.44
  Railroads	0.0	0.0	0.000	0.000	12.60	28.31
  Pipes and Powerlines	4.3	2.7	0.002	0.003	12.51	18.26

  
  Of the natural water in this HUC, 47.81% (by length) is intermittent [% in USA = 49.74, % in Region = 63.93]

  VI. Other sites

  • EPA- Surf Your Watershed - Index of Watershed Indicators
  • USGS- Science in Your Watershed - Selected Realtime Streamflow Stations
  • CTIC- Known Your Watershed

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  1999 SEPT 4, Last updated on 2003 JAN 23
  
  D.L. Gustafson, dlg@rapid.msu.montana.edu