Grass -- Cataloging Unit 04150304

• St. Lawrence Accounting Unit 041503
  
• Northeastern Lake Ontario Subregion 0415
  
• Great Lakes Region 04 (There are 111 cataloging units in this region.)
  The state composition by area is 100.0% New York.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 1790.4 km² ( 691.6 mi² ) [% in USA = 13.74, % in Region = 24.32]
  The area from the USGS is 630 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 556)

  IV. Elevation Analysis

  This analysis is based on 714735 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 263.6 m ( 864.8 ft ) [% in USA = 34.11, % in Region = 59.46]
  The elevation standard deviation is 149.5 m ( 490.5 ft ) [% in USA = 64.23, % in Region = 95.50]
  The coefficient of variation is 56.7 %.
  The vertical relief is 743.6 m ( 2439.6 ft ) [% in USA = 61.01, % in Region = 96.40]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	48.0	74.3	111.0	151.6	196.4	244.0	297.5	366.0	434.1	467.8	791.6
  feet	157.5	243.8	364.2	497.4	644.3	800.5	976.0	1200.8	1424.2	1534.8	2597.1

  

  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	543.5	337.8	0.304	0.488	90.72	91.89
  Intermittent Shoreline	0.0	0.0	0.000	0.000	26.95	45.05
  Perennial Streams	991.8	616.4	0.554	0.891	87.45	88.29
  Intermittent Streams	313.9	195.1	0.175	0.282	28.52	61.26
  Canals	0.0	0.0	0.000	0.000	35.62	36.04
  1° roads	0.1	0.1	0.000	0.000	32.78	26.13
  2° roads	12.0	7.5	0.007	0.011	23.16	32.43
  3° roads	127.2	79.0	0.071	0.114	60.97	45.05
  4° roads	1524.5	947.5	0.851	1.370	25.72	16.22
  Total Roads	1663.7	1034.0	0.929	1.495	26.34	15.32
  Railroads	38.8	24.1	0.022	0.035	31.45	10.81
  Pipes and Powerlines	177.6	110.4	0.099	0.160	94.32	96.40

  
  Of the natural water in this HUC, 16.97% (by length) is intermittent [% in USA = 21.74, % in Region = 40.54]

  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