Inthehollow Posted August 29, 2009 Share Posted August 29, 2009 How steep of grade can you build and still have river rock stay put. Thanks Bret Quote Link to comment Share on other sites More sharing options...
MuleShack Posted August 31, 2009 Share Posted August 31, 2009 I've seen 45 degree slopes behind houses but you have to baffle the hill with metal retainer bars held in place by rebar pounded in the ground a ways to hold back the rock. The water can drain under neath it but the multiple levels of retainers keep the rock in place.The other option is to tier the hill with retaining blocks and drainage tile to keep the pressure off the wall. Quote Link to comment Share on other sites More sharing options...
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