How Much Gravel Base For Retaining Wall

Once you have a good bed of gravel laid down and tamped, it's time to level the first tie in the wall.

How Much Gravel Base For Retaining Wall. I recently installed a large retaining wall in my back yard. How much surcharge is behind those walls or slope?

Do-It-Yourself Retaining Wall Installation Instructions ...
Do-It-Yourself Retaining Wall Installation Instructions ... from www.enhancecompanies.com
A retaining wall's effect on the natural flow of water could impact your neighbors, so some communities require homeowners to obtain a permit before after your drainpipe is in place, you should backfill the rest of the space behind the blocks with either sand or pea gravel—either will allow water to filter. How to build a retaining wall. Below are the various types and their base cost to construct;

Below are the various types and their base cost to construct;

The contractor i hired to do the base work left between 2 and 3 feet of gravel on the ground in front of the wall. The contractor i hired to do the base work left between 2 and 3 feet of gravel on the ground in front of the wall. We set out several structural approaches. Is there a scale i could use or did i miss that?