State Agencies

• ODOT Oklahoma Department of Transportation
  
• OWRB Oklahoma Water Resources Board
  
• ODEQ Oklahoma Department of Environmental Quality
  

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 Federal Agencies

• USDA U.S. Department of Agriculture
  
• DOC U.S. Department of Commerce
  
• EPA Environmental Protection Agency
  

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 Professional Organisations

• ASCE American Society of Civil Engineers
  
• NCE New Civil Engineers Magazine
  
• AWWA American Waterworks Association
  
• WEF Water Environmental Federation
  
• Water-Online Water Online
  
• USGS-Maps USGS Maps