Big Lost -- Cataloging Unit 17040218

• Upper Snake Accounting Unit 170402
  
• Upper Snake Subregion 1704
  
• Pacific Northwest Region 17 (There are 219 cataloging units in this region.)
  The state composition by area is 100.0% Idaho.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 4966.1 km² ( 1918.2 mi² ) [% in USA = 77.55, % in Region = 84.02]
  The area from the USGS is 1900 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 898)

  IV. Elevation Analysis

  This analysis is based on 1984698 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 2156.2 m ( 7074.1 ft ) [% in USA = 95.78, % in Region = 96.35]
  The elevation standard deviation is 474.5 m ( 1556.7 ft ) [% in USA = 95.69, % in Region = 91.78]
  The coefficient of variation is 22.0 %.
  The vertical relief is 2256.5 m ( 7403.1 ft ) [% in USA = 93.04, % in Region = 83.56]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	1460.0	1527.0	1652.0	1846.3	1978.2	2121.0	2268.9	2425.3	2577.5	2812.0	3716.5
  feet	4790.0	5009.8	5419.9	6057.3	6490.1	6958.6	7443.8	7956.9	8456.3	9225.6	12193.1

  

  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	53.3	33.1	0.011	0.017	12.84	14.16
  Intermittent Shoreline	14.4	8.9	0.003	0.005	69.45	83.56
  Perennial Streams	1546.5	961.2	0.311	0.501	58.74	33.79
  Intermittent Streams	2597.1	1614.1	0.523	0.841	72.00	82.65
  Canals	49.9	31.0	0.010	0.016	66.46	58.90
  1° roads	0.0	0.0	0.000	0.000	30.84	59.82
  2° roads	136.6	84.9	0.027	0.044	53.29	74.43
  3° roads	34.7	21.6	0.007	0.011	8.15	23.74
  4° roads	2127.1	1322.0	0.428	0.689	4.88	11.42
  Total Roads	2298.4	1428.4	0.463	0.745	5.02	11.87
  Railroads	83.8	52.1	0.017	0.027	26.62	46.12
  Pipes and Powerlines	90.5	56.2	0.018	0.029	36.19	45.66

  
  Of the natural water in this HUC, 62.01% (by length) is intermittent [% in USA = 62.81, % in Region = 75.34]

  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