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<br />revegetating sandy soils. The Bonded Fiber Matrix is further discussed later in the stream <br />channel stabilization section. <br /> <br />Sediment Removal <br />The July 12 flood left very large fans of sediment at the bottom of several drainages where they <br />enter Buffalo Creek. These sediment fans have depths from 3 to 12 feet. This sediment is within <br />and adjacent to Buffalo Creek and any additional rains will wash sediment into the creek and <br />downstream. It is recommended that some of this sediment be removed and Buffalo Creek <br />returned to its original alignment. Sediment would be hauled to a disposal area at an abandoned <br />gravel pit approximately 7 miles from the removal site. <br /> <br />Additional sediment deposits have occurred due to the August 23 and other precipitation events. <br />Most of the sediment fans will be stabilized rather than removed, but it is recommended that <br />approximately 5,000 cubic yards of sediment be excavated and hauled off-site. <br /> <br />Sediment Stabilization and Channel Restoration <br />The rehabilitation team recommends that sediment deposits which are not removed be shaped <br />with heavy equipment and stabilized with vegetation. The sediment stabilization is to include D6 <br />dozer work on 5 acres of sediment. This is in addition to the removal of the sediment described <br />above. This treatment will include relocating stream channels to their original locations, restoring <br />vegetation on sand deltas (including application of hydromulch on 5 acres), and planting willows <br />along the stream banks to hold the sediment in place. <br /> <br />Erosion Control Structures <br />About 1,000 acres of high burn intensity sites require erosion control treatment in order to slow <br />the rate or overland flow of water and to enhance infiltration of water into the ground. This <br />treatment is to include placement of gravel-filled burlap bags along the contour of the selected <br />slopes. Approximately 416,000 linear feet of gravel bags will be required to treat 1,000 acres. <br /> <br />4. Pre-Fire Management <br />In order to help prevent losses from future fires, the following pre-fire mitigation techniques are <br />suggested: <br /> <br />Defensible Space <br />The implementation of this measure is can dramatically improve the survival rate of a structure <br />during a fire. It involves the reduction of fuel loading by thinning or eliminating certain types of <br />vegetation adjacent to the building. The distance required for the defensible space around the <br />perimeter of the building is dependent on several factors including topography and fuel type. The <br />minimum defensible space is generally recommended to be 30 feet. <br /> <br />Building Materials <br />The type of materials used for the construction of a building can also have a significant effect on its <br />survivability during a fire. A roof covering consisting of clay or concrete tile, composite shingle, or <br /> <br />27 <br />