Installation
1. Refer to approved plans for location, extent, and application details. If there are questions or problems with the location, extent, or method of application contact the engineer or responsible on-site officer for assistance.
2. Spread enough rock to completely cover the surface of the soil at the density or thickness specified in the approved plans. If the application density is not supplied, then apply at a thickness of at least 50mm or twice the nominal rock size (whichever is greater).
3. If the exposed soils are dispersive, then ensure these soils are covered with a layer of non-dispersive soil (minimum 200mm) before placement of rock.
4. Make all necessary adjustments to ensure any surface flow is allowed to pass freely across the treated area following its natural drainage path.

Maintenance
1. Inspect all treated surfaces fortnightly and after runoff-producing rainfall.
2. Check for rill erosion, or dislodgment of the rocks.
3. Replace any displaced rocks to maintain the required coverage.
4. If wash-outs occur, repair the slope and reinstall rock cover.
5. If the rock mulching is not effective in containing the soil erosion it should be replaced, or an alternative erosion control procedure adopted.