Snake headwaters -- Cataloging Unit 17040101

• 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 100.0% Wyoming.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 4418.5 km² ( 1706.7 mi² ) [% in USA = 70.96, % in Region = 77.17]
  The area from the USGS is 1680 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 809)

  IV. Elevation Analysis

  This analysis is based on 1764710 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 2502.7 m ( 8210.9 ft ) [% in USA = 98.77, % in Region = 99.54]
  The elevation standard deviation is 310.0 m ( 1017.0 ft ) [% in USA = 83.80, % in Region = 50.23]
  The coefficient of variation is 12.4 %.
  The vertical relief is 1903.2 m ( 6244.0 ft ) [% in USA = 85.69, % in Region = 63.01]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	1926.0	2083.5	2195.9	2321.6	2411.5	2485.7	2560.0	2638.4	2758.6	2928.5	3829.2
  feet	6318.8	6835.5	7204.3	7616.7	7911.6	8155.1	8398.8	8656.1	9050.4	9607.8	12562.8

  

  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	625.7	388.9	0.142	0.228	69.40	82.65
  Intermittent Shoreline	1.1	0.7	0.000	0.000	37.71	51.60
  Perennial Streams	1835.7	1140.9	0.415	0.668	72.10	43.84
  Intermittent Streams	473.9	294.5	0.107	0.173	20.04	29.68
  Canals	5.5	3.4	0.001	0.002	46.99	35.16
  1° roads	0.0	0.0	0.000	0.000	30.84	59.82
  2° roads	153.2	95.2	0.035	0.056	64.05	84.93
  3° roads	0.0	0.0	0.000	0.000	4.07	15.53
  4° roads	731.5	454.7	0.166	0.266	1.04	3.20
  Total Roads	884.8	549.9	0.200	0.322	1.18	3.20
  Railroads	0.0	0.0	0.000	0.000	12.60	28.31
  Pipes and Powerlines	0.0	0.0	0.000	0.000	8.67	12.79

  
  Of the natural water in this HUC, 16.18% (by length) is intermittent [% in USA = 21.08, % in Region = 33.33]

  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