Thorn Creek

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Thorn Creek
Thorn Creek
Physical characteristics
Source 
  location Will County near University Park, Illinois
  coordinates 41°26′08″N87°43′03″W / 41.4355556°N 87.7175°W / 41.4355556; -87.7175 (Thorn Creek origin)
  elevation765 ft (233 m)
Mouth  
  location
Confluence with the Little Calumet River, South Holland, Illinois
  coordinates
41°35′38″N87°34′26″W / 41.5938889°N 87.5738889°W / 41.5938889; -87.5738889 (Thorn Creek mouth)
  elevation
581 ft (177 m)
Length21 mi (34 km)
Basin features
ProgressionThorn Creek → Little Calumet → Calumet → Lake Michigan → Great Lakes → Saint Lawrence Seaway → Gulf of Saint Lawrence
GNIS ID419680 [1]

Thorn Creek is a 20.8-mile-long (33.5 km) [2] tributary of the Little Calumet River that travels through Will and Cook counties in northeastern Illinois just south of Chicago. [1] It starts in the high land of the Valparaiso Moraine before dropping 200 feet (60 m) to the lower elevations of the Little Calumet River valley. Along its path it has cut many deep ravines and valleys. It is usually quite narrow, though the width of the river varies. Under 26th Street in Chicago Heights, a dam built in 1928 forms Sauk Lake (which is very wide), but just north of the street it is just a few feet across. This dam creates an accumulation of several feet of silt in Sauk Lake and is being considered for Notching in 2016 by the Corps of Engineers. The intent is to 'improve stream habitat'. The impact upon Ground Water Recharge, mitigation of Thorn Creek's 'flashiness' and future recreational activities are also concerns of Water-Shed Stakeholders.

See also

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References

  1. 1 2 U.S. Geological Survey Geographic Names Information System: Thorn Creek
  2. U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map, accessed May 19, 2011