When backfilled this square cover on a 20,000 gallon tank will have a carport built on it.
Dome shaped covers allow tanks to be buried much deeper than those with flat covers.
Octagonal Cover showing reinforcement before concrete is laid down. This buried tank is going to have a gazebo built on it's cover.
Partially Buried Tank
Our tanks can be partially or completely buried. The tanks are always round but the covers can be poured round, square or octagonal shapes. Exposed tank covers can be built on or with additional reinforcement can be used as a carport.