Large capacity above ground impoundment tank

An above ground large capacity tank, comprising:

• a plurality of identical, stacked, and interlocked interlocking panels, each of the interlocking panels comprising:
• a plate with an outer surface, an inner surface, a bottom edge, a top edge, a first side edge, and a second side edge opposite the first side edge;
• a first flange extending from the first side edge of the plate and having at least one fastener hole extending through the first flange;
• a second flange extending from the second side edge of the plate and having at least one fastener hole extending through the second flange;
• a third flange extending from the top edge of the plate and having at least one fastener hole extending through the third flange;
• a fourth flange extending from the bottom edge of the plate;
• and
• at least one guide pin provided on the third flange and configured to extend into at least one guide pin hole of a second interlocking panel positioned above and engaged with a first interlocking panel,
• wherein the at least one guide pin is located on the third flange to engage the at least one guide pin hole of the second interlocking panel such that the second interlocking panel is offset vertically relative to the first interlocking panel located below the second interlocking panel, and
• wherein the first flange and the second flange comprise a plurality of fastener holes extending therethrough, and wherein bottom ends of the first flange and the second flange include a greater number of fastener holes than top ends thereof to provide additional support against fluid pressure that develops in the bottom of the large capacity tank.

A method of assembling an above ground large capacity tank, comprising the steps of:

• providing a plurality of identical interlocking panels, each of the interlocking panels comprising:
• a plate with an outer surface, an inner surface, a bottom edge, a top edge, a first side edge, and a second side edge opposite the first side edge;
• a first flange extending from the first side edge of the plate and having at least one fastener hole extending through the first flange;
• a second flange extending from the second side edge of the plate and having at least one fastener hole extending through the second flange;
• a third flange extending from the top edge of the plate and having at least one fastener hole extending through the third flange;
• a fourth flange extending from the bottom edge of the plate;
• and
• at least one guide pin provided on the third flange and configured to extend into at least one guide pin hole of a second interlocking panel positioned above a first interlocking panel,
• wherein the first flange and the second flange comprise a plurality of fastener holes extending therethrough, and wherein bottom ends of the first flange and the second flange include a greater number of fastener holes than top ends thereof to provide additional support against fluid pressure that develops in the bottom of the large capacity tank;
• positioning the second interlocking panel above the first interlocking panel;
• and
• receiving the at least one guide pin of the first interlocking panel into the at least one guide pin hole of the second interlocking panel to interlock the second interlocking panel with the first interlocking panel, such that the second interlocking panel is offset vertically relative to the first interlocking panel located below the second interlocking panel.