Colville -- Cataloging Unit 17020003

• Upper Columbia Subregion 1702
  
• 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 2631.6 km² ( 1016.5 mi² ) [% in USA = 37.66, % in Region = 45.66]
  The area from the USGS is 1030 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 726)

  IV. Elevation Analysis

  This analysis is based on 1051060 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 884.4 m ( 2901.5 ft ) [% in USA = 69.68, % in Region = 36.99]
  The elevation standard deviation is 256.3 m ( 840.9 ft ) [% in USA = 78.16, % in Region = 35.62]
  The coefficient of variation is 29.0 %.
  The vertical relief is 1618.9 m ( 5311.3 ft ) [% in USA = 79.39, % in Region = 42.47]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	393.0	564.9	665.5	727.7	780.2	850.9	918.6	1014.3	1108.6	1237.5	2011.9
  feet	1289.4	1853.3	2183.4	2387.4	2559.7	2791.6	3013.7	3327.7	3637.1	4060.0	6600.6

  

  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	134.6	83.6	0.051	0.082	36.57	47.95
  Intermittent Shoreline	1.6	1.0	0.001	0.001	46.52	62.10
  Perennial Streams	966.0	600.4	0.367	0.591	66.32	37.90
  Intermittent Streams	1033.9	642.6	0.393	0.632	57.08	68.49
  Canals	2.4	1.5	0.001	0.001	44.91	32.42
  1° roads	0.0	0.0	0.000	0.000	30.84	59.82
  2° roads	81.1	50.4	0.031	0.050	58.08	79.91
  3° roads	86.2	53.6	0.033	0.053	33.44	65.75
  4° roads	3103.8	1929.0	1.179	1.898	51.92	66.67
  Total Roads	3271.1	2033.0	1.243	2.000	46.42	67.58
  Railroads	104.6	65.0	0.040	0.064	49.22	70.78
  Pipes and Powerlines	171.5	106.6	0.065	0.105	81.57	89.95

  
  Of the natural water in this HUC, 48.48% (by length) is intermittent [% in USA = 50.40, % in Region = 65.30]

  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