Lower Ouachita- Bayou De Loutre - 08040202

Home to approximately 29,000 Arkansans (2000 Census), the Lower Ouachita- Bayou De Loutre watershed lies within the Ouachita River Basin in Southern Arkansas crossing into Louisiana.  The hydrologic unit code for this watershed is 08040202.  Upstream watersheds are the Lower Ouachita- Smackover (08040201) and the Lower Saline (08040204).  The Lower Ouachita (Louisiana) is downstream.

State-Level Map - Lower Ouachita-Bayou De Loutre Watershed-Level Map - Lower Ouachita-Bayou De Loutre Watershed Land Use Map - Lower Ouachita-Bayou De Loutre
County Pages
(Contact Information)
Major Streams 2006 Land Use
(609 Square Miles)
  • Lapile River
  • Ouachita River
  • Forest: 76.4%
  • Transitional: 12.8%
  • Grassland: 5.1%
  • Water: 4.5%
  • Suburban: 1.2%
  • Urban: 0.3%

Data Source: CAST

Lower Ouachita - Bayou De Loutre 303d Impaired Streams (what is an impaired stream?)


Assessments and Reports


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
Explore your county or watershed with this flash-based interactive map.  View over 25 geographic and water-related layers. Open Interactive Watershed Viewer.