Lower Columbia -- Cataloging Unit 17080006

• Lower Columbia Subregion 1708
  
• Pacific Northwest Region 17 (There are 219 cataloging units in this region.)
  The state composition by area is 60.2% Oregon, 39.8% Washington.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 1417.0 km² ( 547.3 mi² ) [% in USA = 8.15, % in Region = 10.05]
  The area from the USGS is 672 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 754)

  IV. Elevation Analysis

  This analysis is based on 566403 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 211.8 m ( 694.9 ft ) [% in USA = 25.86, % in Region = 5.94]
  The elevation standard deviation is 189.7 m ( 622.4 ft ) [% in USA = 70.63, % in Region = 20.55]
  The coefficient of variation is 89.6 %.
  The vertical relief is 913.5 m ( 2997.0 ft ) [% in USA = 63.86, % in Region = 6.85]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	0.0	14.7	47.3	61.0	105.9	161.6	229.1	300.8	371.5	492.9	913.5
  feet	0.0	48.2	155.2	200.1	347.4	530.2	751.6	986.9	1218.8	1617.1	2997.0

  

  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	342.8	213.1	0.242	0.389	85.17	94.52
  Intermittent Shoreline	0.0	0.0	0.000	0.000	26.95	43.84
  Perennial Streams	1053.9	655.0	0.744	1.197	97.68	95.89
  Intermittent Streams	64.6	40.1	0.046	0.073	12.88	15.07
  Canals	1.7	1.1	0.001	0.002	46.71	34.70
  1° roads	1.0	0.6	0.001	0.001	40.08	66.67
  2° roads	84.1	52.3	0.059	0.096	89.48	97.26
  3° roads	75.3	46.8	0.053	0.085	49.41	83.11
  4° roads	2929.8	1820.9	2.068	3.327	93.60	94.52
  Total Roads	3090.2	1920.6	2.181	3.509	92.18	94.52
  Railroads	29.1	18.1	0.021	0.033	30.51	50.23
  Pipes and Powerlines	51.9	32.3	0.037	0.059	58.22	68.49

  
  Of the natural water in this HUC, 4.42% (by length) is intermittent [% in USA = 10.14, % in Region = 12.33]

  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