How To Make A Creek Deeper . Ten years ago, the best of the three was at least ten feet high, from the top of the slate creekbed up above to the rocks under the water, and even the tallest could stand. Once your check dam is in place, level out the gully. Deep Creek Falls, Oregon DDZ_6846 Deep Creek falls along H… Flickr from www.flickr.com After the initial impacts from the dredging the area may recover in time, depending on the shoreline condition and the magnitude of the impacts. Dry creek beds can be made up of a variety of sizes of rock. Once the path has been covered in landscape fabric, it’s time for the rock.