Weight it good and try to place in a bend out of the main current. Helps to put it under a cut or drop downstream where current is somewhat blocked. Build small as the larger ones catch more current and require more weight. Place in low water periods to let it settle in before high water . I perfer pallet beds with short narrow stakes as they catch less current being close to the bottom. We still have lost a few durring extemely high water some springs as the river gets bad swift . Nimrod is a flood control lake and the river brings lots of water from the mountains.