Question How Deep Do Ponds Need To Be? - Advice Needed

AddieG

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Hello! I am starting out my first backyard pond for my goldfish. Lots of them are small, but a few are a bit bigger. Not 8 in. big though. Right now they're in a doggy pool, maybe 100 gallons, which is too small. The main reason for getting a pond. So I have a big pond liner, a few pumps, some plants, rocks, all of the goodies. But my main question is how deep do I need to make the pond? I live in Chicago, and in the winter it can get very very cold. Right now, I'm about 2 feet deep in the ground, which is basically clay dirt. Any advice would be great. Thank you!
 

david1978

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The Midwest portion of the country has a frost line that goes between 30 and 40 inches on average. Currently, the frost linein the Chicago area is recorded at 40 inches, which means that the water in the soil has not frozen at levels deeper than 40 inches below ground.

That's quoted from this.
 
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AddieG

AddieG

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david1978 said:
The Midwest portion of the country has a frost line that goes between 30 and 40 inches on average. Currently, the frost linein the Chicago area is recorded at 40 inches, which means that the water in the soil has not frozen at levels deeper than 40 inches below ground.

That's quoted from this.
Okay. That website is very informative. Thank you for that, and responding so fast. Judging by that, the pond would need to be a little bit deeper than 3.3 feet if I don't want it to freeze. Do you think 4 feet would be a safe estimate?
 

david1978

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Our frost line is around 30" so ponds are typically 3-3 1/2 foot deep. So 4 feet should be good.
 

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