There are a few things to consider when building or digging a pond
The first thing to check is, will the soil hold water at your pond's location? Sandy soils dig easy, but will leak water out to the point that the pond drys up every year or sooner, and the fish die.
You may have to add Benoite, clay or lime to seal and hold water when building a pond. Clay holds water well in most cases, but is harder to dig. Make sure when building the dam, to pack clay in and walk it in with dozer so clay will seal, and not leak water later. For the best high grade pond sealer contact drillcat.com for prices and which material to use for best results.
The best location for a pond is where the most water shed (where water flows to a low spot) occurs. One inch of rain on one acre equals 44,000 gallons of water, so just a few acres of water shed can fill a pond in just one rain. Avoid putting the pond on top of hill with no water shed. Avoid putting the pond in an area where soil will not hold water well. Deep ponds are the best, if you can build them this way. Deeper water shades sun from pond bottom and algae grows slow in low light, so the deeper the pond the less algae you'll have.
Keeping ponds & lakes full is key
A full pond not only looks great, it is the only way a pond will work. With water levels at a constant level fish will thrive and stay healthy, and water will stay fresh and not stink. Even if your water des not leak out, you will always lose some water to evaporation. A good shallow or deep water well near pond is best. If you have several ponds you may consider buying a portable water well drilling rig to drill your own solar well or even windmill well. Some farmers and ranchers who have many ponds this would be a good investment. After just drilling 2 or three water wells your drilling rig would be payed for. Contact www.drillcat.com for free hands on drill training info.
One other good suggestion, and also a free service, is call your local county Ag extension agent. They offer there services free, and some counties offer to pay a portion of your pond's digging, as long as the pond construction is done to there specs.
Drillcat does have consultants who can help design or troubleshoot pond problems. It does cost money for a good pond sealer, but still cheaper than constantly running well water to keep filled and keep restocking fish because of fish kill. for more info contact www.drillcat.com