Ponds

Soooo, You Want to Build a Fish Pond - Legal considerations in building a pond in Colorado
Wetland pond considerations - more information on who to contact when planning a pond

Pond Construction

Pond Construction: Some Practical Considerations - Virginia Cooperative Extension
Renovating Leaky Ponds - Texas A&M (PDF) - contains information on pond lining options
Sealing Leaking Ponds - Mississippi State University

Aquatic Weeds

Aquatic Weed Control in Missouri - University of Missouri
Controlling Pond Algae with Barley Straw - University of Nebraska
Chemical Control of Aquatic Weeds - Ohio State University
Controlling Filamentous Algae in Ponds - Ohio State University