We built a paver block retaining wall about 40' long 4' high sloping down to ground level about three months ago. The problem is now after turning on the irrigation the wall will start to leak out water not long after. When installing the wall I walked in all back filled dirt with my tractor, but as I seid evidently there must be some drain tunnels that have evollved over a short time. He also not only has irrigation on the plant material that we installed but soaker hose to. Any suggestions on how to remidy this situation would be appretiated.