geogrid 5 not shown in fig5 typically will be rolled up in a form easy to be unrolled next anchoring rod 55 is located from a position above geogrid 5 as shown in fig6 to a position atop geogrid 5 as shown in fig6 viz in the direction of arrow 102 then the forward portion of geogrid 5 as shown in fig6 is folded forwardly over rod 55 to the position shown in fig7 viz in the direction of arrow 103 next as indicated in fig7 and 8 anchoring rod 60 is transversely inserted atop the forwardly folded end portion of geogrid 5 and through the inverted u shaped envelopes provided by ends 21 of support 11 next as indicated in fig9 and 10 by arrows 104 and 105 both the forward portion and the remaining extension of geogrid 5 are folded rearwardly over anchoring rod 60 to the position shown in fig1 geogrid 5 is then situated to be tensioned to the position shown in fig4 where it is tighened on rods 55 60 other structures for supporting earthen embankments are within the scope of the present invention for example fig1 illustrates a case where a backfill earthen embankment 205 lies between a retaining wall 70 comprised of concrete blocks 72 and a rock face 300 flexible fiber geogrids 80 progressively installed during the process of adding the backfill each extend longitudinally through embankment 205 from a first end portion 81 held and secured between.