"dnoyeB" wrote in message
. ..
I decided to build a cistern so I can use the water from my sump pit on my
grass. the sump does not produce enough GPM so ill need the reservoir to
be able to run the pump without cycling continuously.

It will be 600 to 1000 gallons. Right now it will be 10' long 4' wide and
4' to 5' deep.

I planning to have 8" thick concrete base and the walls will be concrete
blocks. My question is, do I need rebar anywhere? and do the walls need
to be filled with cement? any rebar in the walls?

Its looking to be 5 blocks high and its going to be in the ground. Any
gotchas I should know about? Do I need to have any provisions for
drainage around the cistern footer?


Thanks,


Carl
You will need some sort of waterproofing on the inside because blocks and
mortar are not themselves watertight. I would definitely use rebar and some
cavity filling, as earth pressure can be pretty high and it would be likely
to crack when empty. If a high water table is possible you might need some
way to keep it from floating out of the ground. There should be government
guidelines available, maybe build it like you would a septic tank. Be alert
to possible bacteria problems in the water.

Don Young