Powder -- Cataloging Unit 17050203

• Middle Snake-Powder Accounting Unit 170502
  
• Middle Snake Subregion 1705
  
• 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 4469.4 km² ( 1726.4 mi² ) [% in USA = 71.81, % in Region = 78.08]
  The area from the USGS is 1720 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1617)

  IV. Elevation Analysis

  This analysis is based on 1785127 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 1327.8 m ( 4356.2 ft ) [% in USA = 79.58, % in Region = 61.64]
  The elevation standard deviation is 383.0 m ( 1256.5 ft ) [% in USA = 90.15, % in Region = 74.43]
  The coefficient of variation is 28.8 %.
  The vertical relief is 2245.8 m ( 7368.0 ft ) [% in USA = 92.66, % in Region = 81.74]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	618.0	956.7	1035.0	1071.2	1148.0	1220.6	1327.4	1454.0	1606.6	1900.7	2863.8
  feet	2027.5	3138.7	3395.6	3514.4	3766.4	4004.5	4354.9	4770.3	5270.9	6235.8	9395.6

  

  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	128.1	79.6	0.029	0.046	25.15	32.88
  Intermittent Shoreline	1.1	0.7	0.000	0.000	37.23	51.14
  Perennial Streams	2065.0	1283.4	0.462	0.743	78.11	55.71
  Intermittent Streams	1716.9	1067.1	0.384	0.618	56.04	67.12
  Canals	593.1	368.6	0.133	0.214	94.69	95.89
  1° roads	80.6	50.1	0.018	0.029	66.89	83.56
  2° roads	35.6	22.1	0.008	0.013	24.87	46.12
  3° roads	216.2	134.4	0.048	0.078	45.19	78.54
  4° roads	4863.3	3022.6	1.088	1.751	43.96	58.90
  Total Roads	5195.7	3229.1	1.163	1.870	40.31	61.19
  Railroads	77.3	48.0	0.017	0.028	26.95	46.58
  Pipes and Powerlines	145.2	90.3	0.032	0.052	53.96	66.21

  
  Of the natural water in this HUC, 43.93% (by length) is intermittent [% in USA = 46.33, % in Region = 59.36]

  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