Snoqualmie -- Cataloging Unit 17110010

• Puget Sound Subregion 1711
  
• 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 1795.8 km² ( 693.7 mi² ) [% in USA = 13.97, % in Region = 17.81]
  The area from the USGS is 693 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 680)

  IV. Elevation Analysis

  This analysis is based on 717222 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 651.1 m ( 2136.1 ft ) [% in USA = 62.25, % in Region = 24.20]
  The elevation standard deviation is 466.0 m ( 1528.9 ft ) [% in USA = 95.26, % in Region = 90.41]
  The coefficient of variation is 71.6 %.
  The vertical relief is 2222.1 m ( 7290.3 ft ) [% in USA = 92.42, % in Region = 80.82]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	27.7	119.6	185.1	281.4	381.2	545.9	758.0	960.3	1132.7	1315.4	2249.8
  feet	90.9	392.4	607.3	923.2	1250.6	1791.0	2486.8	3150.6	3716.2	4315.6	7381.1

  

  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	271.4	168.7	0.151	0.243	72.19	87.67
  Intermittent Shoreline	0.0	0.0	0.000	0.000	26.95	43.84
  Perennial Streams	1026.9	638.2	0.572	0.920	89.15	73.06
  Intermittent Streams	32.8	20.4	0.018	0.029	8.53	8.22
  Canals	5.5	3.4	0.003	0.005	54.14	43.38
  1° roads	77.7	48.3	0.043	0.070	87.12	94.52
  2° roads	0.0	0.0	0.000	0.000	15.35	29.22
  3° roads	69.4	43.1	0.039	0.062	38.04	67.58
  4° roads	2050.8	1274.6	1.142	1.838	48.56	64.38
  Total Roads	2197.9	1366.0	1.224	1.969	44.91	66.21
  Railroads	86.7	53.9	0.048	0.078	57.60	77.63
  Pipes and Powerlines	40.0	24.9	0.022	0.036	40.98	52.51

  
  Of the natural water in this HUC, 2.46% (by length) is intermittent [% in USA = 7.77, % in Region = 8.22]

  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