Keep Arkansas Beautiful
- Helps preserve the natural scenic beauty and quality environment through activities and programs for preventing litter, encouraging recycling, and enhancing the state's scenic values by promoting beautification. Programs, events, and newsletters.
- http://www.keeparkansasbeautiful.com/

Arkansas Natural Heritage Commission
- Preserves the state's natural heritage biodiversity by identifying and protecting rare and endangered species and natural areas. Includes species lists, state natural areas information, and other topics.
- http://www.naturalheritage.org/

Arkansas Grand Prairie Irrigation Project
- Details the pumping station on the White River, channels, pipelines, and associated structures bringing surface water to water-depleted Eastern Arkansas.
- http://www.mvm.usace.army.mil/grandprairie/