The Public Policy Information Fund and its Rio Grande Institute draw upon grants and contracts to support research and education projects and meet modest overhead costs. Supporters included:
- Meadows Foundation
- National Park Service
- Public Policy Information Fund
- World Wildlife Fund
- Environmental Protection Agency
- Trull Foundation
- Museo Maderas del Carmen, AC
- Friends of Big Bend National Park
- Dell Computer Corporation
- US Economic Development Administration
- Federal Emergency Management Agency
- Raytheon Corporation
- RGK Foundation
- Southwest Airlines
- SBC Corporation (AT&T))
- SRS Properties
- Texas Council Humanities (NEH)
- Texas Natural Resource Information System
- Texas Telecommunications Infrastructure Fund Board
- Tocker Foundation
- US Department of Interior
