Lower Ouachita- Smackover Watershed - 08040201

Home to approximately 67,000 Arkansans (2000 Census), the Lower Ouachita-Smackover watershed lies within the Ouachita River Basin in Southern Arkansas.  The hydrologic unit code for this watershed is 08040201.  Upstream is the Upper Ouachita (08040102).  The Lower Ouachita- Bayou De Loutre (08040202) is downstream.

State-Level Map - Lower Ouachita-Smackover Watershed-Level Map - Lower Ouachita-Smackover Watershed Land Use Map - Lower Ouachita-Smackover
County Pages
(Contact Information)
Major Streams 2006 Land Use
(1797 Square Miles)
  • Camp Creek
  • Campagnolle Creek
  • Moro Creek
  • Ouachita River
  • Smackover Creek
  • Forest: 76.6%
  • Transitional: 15.3%
  • Grassland: 6.3%
  • Suburban: 1.5%
  • Water: 0.8%
  • Urban: 0.2%
  • Cropland: 0.0%

Data Source: CAST

Lower Ouachita - Smackover 303d Impaired Streams (what is an impaired stream?)


Total Maximum Daily Load (TMDL) Documents (what is a TMDL?)


More Watershed-Related Information


  • Clean Water Act Section 303(d) Impaired Waters Data Update here
  • Arkansas’s Final/ Draft Impaired Waterbodies – 303(d) List by Year here
  • AR Water Newsletter, Summer, 2015 here
  • NPS Management Plan here
  • The projects presented at the 2015 annual NPS conference are located here

Interactive Map

Interactive Watershed Viewer
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