• Centre County Solid Waste Authority
• Central Pennsylvania Bird Hotline
  Welcome to Pennsylvania Audubon's and the Patriot-News' Birdline.
• ClearWater Conservancy
  "Promoting Conservation in the Heart of Pennsylvania Since 1980"
• Hawk Mountain Sanctuary
  "A 2,400-acre natural area straddling the Kittatinny Ridge in eastern Pennsylvania. Established in 1934, it was the world's first refuge for raptors. During the last 64 years, the Sanctuary has become an international center for conservation, education, and research about raptors."
• Internet Watershed Educational Tool (InterWET)
  "InterWET gives a technical and multi-perspective response to local watershed issues, using as a case study the Spring Creek Watershed in central Pennsylvania."
• Millbrook Marsh Nature Center
  "A 62-acre area located at 614 Puddintown Road, College Township, and operated by Centre Region Parks & Recreation, State College."
• Mount Nittany Conservancy
  "....a non-profit organization dedicated to the preservation of the unspoiled beauty of Centre County's most prominent natural landmark."
• Penns Valley Conservation Association
  "This site is intended to be a celebration of the rich heritage of the area, an up-to-date sources of information on Penns Valley as it exists today, and a catalyst for wise choices as the valley moves into the twenty-first century."
• Pennsylvania Department of Conservation and Natural Resources
• Pennsylvania Department of Environmenal Protection
• Spring Creek Watershed Community
  "The Spring Creek Watershed Community promotes actions that protect and enhance the quality of life, environment and economy throughout the watershed while maintaining and improving the high quality of Spring Creek and its tributaries."

11/09/2007