Siletz-Yaquina -- Cataloging Unit 17100204

• 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 1966.3 km² ( 759.5 mi² ) [% in USA = 18.95, % in Region = 23.74]
  The area from the USGS is 753 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1166)

  IV. Elevation Analysis

  This analysis is based on 784841 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 247.6 m ( 812.3 ft ) [% in USA = 31.31, % in Region = 7.76]
  The elevation standard deviation is 207.2 m ( 679.8 ft ) [% in USA = 72.52, % in Region = 23.74]
  The coefficient of variation is 83.7 %.
  The vertical relief is 1094.7 m ( 3591.5 ft ) [% in USA = 67.79, % in Region = 12.33]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	0.0	61.0	67.8	119.6	136.5	182.9	237.8	302.4	374.2	541.3	1094.7
  feet	0.0	200.1	222.4	392.4	447.8	600.1	780.2	992.1	1227.7	1775.9	3591.5

  

  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	198.7	123.5	0.101	0.163	56.37	69.41
  Intermittent Shoreline	1.3	0.8	0.001	0.001	48.08	63.93
  Perennial Streams	1682.1	1045.4	0.855	1.376	99.01	99.09
  Intermittent Streams	268.4	166.8	0.136	0.220	23.87	36.07
  Canals	0.0	0.0	0.000	0.000	35.62	23.74
  1° roads	1.4	0.8	0.001	0.001	39.74	65.75
  2° roads	103.0	64.0	0.052	0.084	84.79	96.35
  3° roads	124.9	77.6	0.064	0.102	57.08	90.87
  4° roads	3833.9	2382.8	1.950	3.137	91.85	93.15
  Total Roads	4063.2	2525.3	2.066	3.325	90.38	93.15
  Railroads	80.6	50.1	0.041	0.066	50.45	71.69
  Pipes and Powerlines	63.0	39.2	0.032	0.052	53.58	65.30

  
  Of the natural water in this HUC, 12.54% (by length) is intermittent [% in USA = 17.15, % in Region = 27.85]

  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