A retaining wall with stacked courses of concrete modules, each module
having an upright front wall, two upright lateral walls, and a bottom
wall. Each lateral wall has a front edge adjoining the front wall, a back
edge spaced from the front edge, and upright ribs extending in-wardly
outwardly from the lateral wall. The upright ribs are spaced equally from
the front wall. Each lateral wall also has a provision for receiving a
batten which, if pulled backwardly, bears against the upright ribs. A
geogrid is anchored to the modules by the batten.
