Mackinaw -- Cataloging Unit 07130004

• Lower Illinois Subregion 0713
  
• Upper Mississippi Region 07 (There are 131 cataloging units in this region.)
  The state composition by area is 100.0% Illinois.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 3020.4 km² ( 1166.7 mi² ) [% in USA = 47.04, % in Region = 40.46]
  The area from the USGS is 1130 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 453)

  IV. Elevation Analysis

  This analysis is based on 1205932 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 218.6 m ( 717.2 ft ) [% in USA = 27.00, % in Region = 25.95]
  The elevation standard deviation is 26.6 m ( 87.3 ft ) [% in USA = 18.14, % in Region = 38.17]
  The coefficient of variation is 12.2 %.
  The vertical relief is 154.8 m ( 507.9 ft ) [% in USA = 19.28, % in Region = 39.69]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	131.4	179.9	200.4	214.9	221.4	226.2	229.0	231.0	236.9	244.0	286.2
  feet	431.1	590.2	657.5	705.0	726.4	742.1	751.3	757.9	777.2	800.5	939.0

  

  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	148.2	92.1	0.049	0.079	35.48	17.56
  Intermittent Shoreline	5.7	3.6	0.002	0.003	62.86	64.12
  Perennial Streams	943.7	586.5	0.312	0.503	58.93	70.23
  Intermittent Streams	932.2	579.3	0.309	0.497	46.52	41.22
  Canals	30.0	18.7	0.010	0.016	66.27	60.31
  1° roads	139.9	87.0	0.046	0.075	88.16	90.84
  2° roads	99.1	61.6	0.033	0.053	61.20	54.20
  3° roads	195.4	121.5	0.065	0.104	57.89	30.53
  4° roads	4043.2	2512.8	1.339	2.154	67.74	64.89
  Total Roads	4477.6	2782.9	1.482	2.385	67.46	64.89
  Railroads	354.6	220.4	0.117	0.189	90.76	80.92
  Pipes and Powerlines	112.3	69.8	0.037	0.060	58.65	71.76

  
  Of the natural water in this HUC, 46.21% (by length) is intermittent [% in USA = 48.37, % in Region = 47.33]

  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