Lemhi -- Cataloging Unit 17060204

• Salmon Accounting Unit 170602
  
• Lower Snake Subregion 1706
  
• 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 3294.9 km² ( 1272.7 mi² ) [% in USA = 52.30, % in Region = 59.82]
  The area from the USGS is 1270 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 625)

  IV. Elevation Analysis

  This analysis is based on 1315833 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 2168.2 m ( 7113.4 ft ) [% in USA = 96.07, % in Region = 96.80]
  The elevation standard deviation is 409.4 m ( 1343.2 ft ) [% in USA = 92.04, % in Region = 81.28]
  The coefficient of variation is 18.9 %.
  The vertical relief is 2138.7 m ( 7016.6 ft ) [% in USA = 90.67, % in Region = 75.80]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	1207.0	1641.8	1827.9	1925.5	2028.7	2142.3	2259.4	2403.7	2554.7	2732.8	3345.7
  feet	3959.9	5386.4	5997.0	6317.2	6655.8	7028.5	7412.6	7886.1	8381.5	8965.8	10976.6

  

  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	32.1	19.9	0.010	0.016	12.13	13.70
  Intermittent Shoreline	0.0	0.0	0.000	0.000	26.95	43.84
  Perennial Streams	1393.1	865.8	0.423	0.680	73.33	46.58
  Intermittent Streams	686.8	426.9	0.208	0.335	32.92	44.75
  Canals	150.2	93.3	0.046	0.073	83.66	83.11
  1° roads	0.0	0.0	0.000	0.000	30.84	59.82
  2° roads	0.0	0.0	0.000	0.000	15.35	29.22
  3° roads	127.5	79.2	0.039	0.062	38.09	68.04
  4° roads	1501.2	933.0	0.456	0.733	5.59	12.33
  Total Roads	1628.7	1012.2	0.494	0.795	5.97	12.33
  Railroads	0.0	0.0	0.000	0.000	12.60	28.31
  Pipes and Powerlines	20.1	12.5	0.006	0.010	18.66	26.94

  
  Of the natural water in this HUC, 32.52% (by length) is intermittent [% in USA = 36.43, % in Region = 48.86]

  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