Alsea -- Cataloging Unit 17100205

• Northern Oregon Coastal Accounting Unit 171002
  
• Oregon-Washington Coastal Subregion 1710
  
• Pacific Northwest Region 17 (There are 219 cataloging units in this region.)
  The state composition by area is 100.0% Oregon.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 1796.3 km² ( 693.9 mi² ) [% in USA = 14.02, % in Region = 18.26]
  The area from the USGS is 697 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1045)

  IV. Elevation Analysis

  This analysis is based on 717645 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 276.2 m ( 906.2 ft ) [% in USA = 35.95, % in Region = 10.05]
  The elevation standard deviation is 174.6 m ( 572.8 ft ) [% in USA = 68.36, % in Region = 15.53]
  The coefficient of variation is 63.2 %.
  The vertical relief is 1226.4 m ( 4023.6 ft ) [% in USA = 71.34, % in Region = 19.18]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	0.0	62.3	122.0	170.4	205.2	246.6	300.0	349.7	418.0	504.1	1226.4
  feet	0.0	204.4	400.3	559.0	673.2	809.0	984.2	1147.3	1371.4	1653.9	4023.6

  

  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	62.5	38.9	0.035	0.056	28.38	38.81
  Intermittent Shoreline	0.1	0.0	0.000	0.000	29.46	46.12
  Perennial Streams	909.3	565.2	0.506	0.814	82.71	60.73
  Intermittent Streams	607.2	377.4	0.338	0.544	49.83	59.36
  Canals	0.0	0.0	0.000	0.000	35.62	23.74
  1° roads	0.0	0.0	0.000	0.000	30.84	59.82
  2° roads	67.6	42.0	0.038	0.061	67.93	88.13
  3° roads	76.8	47.8	0.043	0.069	41.40	71.23
  4° roads	3079.7	1914.0	1.714	2.759	87.16	88.58
  Total Roads	3224.2	2003.8	1.795	2.888	84.32	88.13
  Railroads	0.0	0.0	0.000	0.000	12.60	28.31
  Pipes and Powerlines	45.6	28.4	0.025	0.041	45.38	58.90

  
  Of the natural water in this HUC, 38.46% (by length) is intermittent [% in USA = 41.54, % in Region = 54.34]

  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