Lower Snake -- Cataloging Unit 17060110

• Lower Snake Accounting Unit 170601
  
• Lower Snake Subregion 1706
  
• Pacific Northwest Region 17 (There are 219 cataloging units in this region.)
  The state composition by area is 100.0% Washington.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 1917.5 km² ( 740.7 mi² ) [% in USA = 17.53, % in Region = 22.83]
  The area from the USGS is 731 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 134)

  IV. Elevation Analysis

  This analysis is based on 765400 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 308.5 m ( 1012.1 ft ) [% in USA = 39.93, % in Region = 12.33]
  The elevation standard deviation is 96.7 m ( 317.3 ft ) [% in USA = 54.76, % in Region = 2.28]
  The coefficient of variation is 31.3 %.
  The vertical relief is 569.8 m ( 1869.4 ft ) [% in USA = 56.61, % in Region = 2.28]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	101.0	176.1	213.5	248.2	286.7	304.4	335.0	365.0	399.0	426.1	670.8
  feet	331.4	577.7	700.5	814.3	940.6	998.7	1099.1	1197.5	1309.0	1397.9	2200.8

  

  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	228.9	142.2	0.119	0.192	62.34	76.26
  Intermittent Shoreline	0.0	0.0	0.000	0.000	28.47	45.21
  Perennial Streams	2.3	1.4	0.001	0.002	3.69	0.46
  Intermittent Streams	1110.5	690.2	0.579	0.932	77.83	88.58
  Canals	5.4	3.4	0.003	0.005	53.62	42.47
  1° roads	0.0	0.0	0.000	0.000	30.84	59.82
  2° roads	2.5	1.5	0.001	0.002	17.24	34.25
  3° roads	57.3	35.6	0.030	0.048	30.55	61.64
  4° roads	1474.2	916.2	0.769	1.237	20.27	34.25
  Total Roads	1534.0	953.4	0.800	1.287	19.19	32.88
  Railroads	234.4	145.7	0.122	0.197	91.90	96.80
  Pipes and Powerlines	180.6	112.2	0.094	0.152	92.94	98.17

  
  Of the natural water in this HUC, 82.77% (by length) is intermittent [% in USA = 81.34, % in Region = 94.06]

  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