O3raledale wrote:

Hello all,
How does one find out what the frost line is in their area of the country? I
live in Philadelphia, PA. and my pond is only about 18" deep. Will my goldies
be safe in there over the winter with just a couple of air stones going? Can I
leave my filter waterfalls/ stream going until it freezes to the point of
spilling out and then turn off the pump and start the air bubbler then? Please
let me know your thoughts on this matter.
Thank you all,
-Pat
Hi Pat

Here in Eastern PA, lately we have been getting a frostline from nothing
down
to about 10 inches most years, but I have seen 36" frostline one winter.
Most cities around Allentown require an average depth for building footers
of around 32-40". If I recall correctly. Your best bet is to give a
local plumber or concrete contractor a call and ask what the localfrost
line is.


here are some suggested support depths
( i don't remember where I got this)
Area Depth of Supports (inches)
Albany, New York 42
Albuquerque, New Mexico 18
Anchorage, Alaska 42
Atlanta, Georgia 12
Baltimore, Maryland 18
Bangor, Maine 48
Charleston, West Virginia 24
Columbus, Ohio 32
Denver, Colorado 36
El Paso, Texas 6
Greensboro, North Carolina 12
Knoxville, Tennessee 18
Los Angeles, California 12
Minneapolis, Minnesota 42
Omaha, Nebraska 42
Portland, Oregon 16
Salt Lake City, Utah 36
Tampa, Florida 6
Local requirements may vary

Chagoi