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Chapter 4 - Best Management Practices for Erosion and Sediment Control <br /> vegetative practices contained in this handbook. <br /> Maintenance <br /> Both temporary and permanent roads and parking areas may require periodic top dressing <br /> with new gravel . Seeded areas adjacent to the roads and parking areas should be checked <br /> periodically to insure that a vigorous stand of vegetation is maintained . Roadside ditches and <br /> other drainage structures should be checked regularly to insure that they do not become <br /> clogged with silt or other debris . <br /> .r <br /> .r <br /> 4- 13 <br /> +rr <br />