Middle Columbia-Hood -- Cataloging Unit 17070105

• Middle Columbia Accounting Unit 170701
  
• Middle Columbia Subregion 1707
  
• Pacific Northwest Region 17 (There are 219 cataloging units in this region.)
  The state composition by area is 53.2% Oregon, 46.8% Washington.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 5604.6 km² ( 2164.9 mi² ) [% in USA = 83.75, % in Region = 89.50]
  The area from the USGS is 2170 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 2143)

  IV. Elevation Analysis

  This analysis is based on 2238254 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 686.6 m ( 2252.6 ft ) [% in USA = 63.57, % in Region = 26.94]
  The elevation standard deviation is 402.8 m ( 1321.5 ft ) [% in USA = 91.71, % in Region = 78.54]
  The coefficient of variation is 58.7 %.
  The vertical relief is 3695.2 m ( 12123.2 ft ) [% in USA = 99.53, % in Region = 98.63]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	13.4	212.4	343.2	442.0	548.7	635.7	731.4	853.0	1014.1	1201.7	3708.6
  feet	44.0	696.8	1126.0	1450.1	1800.2	2085.6	2399.6	2798.5	3327.1	3942.5	12167.2

  

  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	639.4	397.4	0.114	0.184	61.16	74.43
  Intermittent Shoreline	3.8	2.4	0.001	0.001	48.41	64.38
  Perennial Streams	1804.7	1121.6	0.322	0.518	60.30	34.25
  Intermittent Streams	2549.6	1584.6	0.455	0.732	64.05	75.80
  Canals	49.4	30.7	0.009	0.014	64.66	55.71
  1° roads	139.3	86.6	0.025	0.040	75.04	89.50
  2° roads	112.1	69.7	0.020	0.032	42.16	62.10
  3° roads	241.2	149.9	0.043	0.069	41.69	72.15
  4° roads	6738.0	4187.7	1.202	1.934	54.43	67.58
  Total Roads	7230.6	4493.9	1.290	2.076	50.36	69.41
  Railroads	324.9	201.9	0.058	0.093	65.18	81.28
  Pipes and Powerlines	523.3	325.2	0.093	0.150	92.75	97.72

  
  Of the natural water in this HUC, 51.09% (by length) is intermittent [% in USA = 52.25, % in Region = 67.58]

  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