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<br /> <br />Maintaining or establishing surface hydrologic stability is a critical compocent in the mining <br />' and reclamation process. Adequately controlling erosion and mie~m~7jng sediment transport <br />serve to prevent or mimmiu impacts to receiving water, and support and enhance the long-term <br />stability of reclaimed areas. There are a variety BMPs that may be employed to accomplish <br />' these goals during development, operation and reclamation of project components. BMPs may <br />be used individually or in combination to accomplish erosion and sediment control objectives. <br />While serving a mmmon purpose, there are distinct applications to which BMPs are best <br />suited. Plosion and sediment control requires the use of specific BMPs that address different <br />' physical conditions than those associated with channel reconstruction. Generally, surface sheet <br />flow control practices vary physically from those used to control concentrated surface flows <br />because of the differences in environmental conditions and requirements. Selecting an <br />' individual BMP or a wmbination of BMPs for use on a site must take into consideration the <br />variety of flow conditions that may occur there. Oftem there is not a correct solution, but rather <br />a variety of combinations that may accomplish erosion and sediment control objectives for a <br />' given location. Typically, complex flows require more sophisticated structures and practices <br />than less complex flows, In the following two subsections, installation considerations and <br />construction specifications are presented for BMP structures and practices <br />t 3.3.1 BMP Installation <br />Control of erosion and prevention of sedimentation are important within and adjacent to the <br />' disturbxd area. Diversion of undisturbed runoff around or passing it safely through the <br />disturbed area serves to facilitate operations and avoid unnecessary sedimentation. Among the <br />most important features for maintaining stability of the postmining landscape are reconstructed <br />drainages. Reclaimed slope characteristics also play a critical role in erosion and sediment <br />t control. <br />Since erosion and sediment control structures and practices play such an important role in land <br />' form stability and surface productivity, utmost care will be taken to ensure that structures are <br />properly installed. When constructing erosion control and sedimentation structures or <br />implementing such practices, American Soda will accomplish the following: <br />' Care will be taken to ensure that structures are properly installed. This is critical to the <br />effective use of a structure. The most common cause of structure failure is improper <br />installation. <br />• Time will be taken to evaluate the problem using reliable, experienced information sources <br />whenever possible. The more complicated the problem becomes, the more time it usually <br />' requires to develop proper effective control solutions. <br />• Structures and practices will appropriately match the site conditions. Specifications and <br />' installation will be based om environmental conditions under which they are expected to <br />perform. <br />' Consideration of the range of climatic site conditions that occur throughout the year will be <br />made. Specifications and installation will be based om climatic conditions under which they <br />are expected to perform. <br />' Americas Soda, LLP. 3-5 <br /> Soil Cooservetion, Plosion and Scdimrnt <br /> Control, Redamatloo, avd Revegeiation Ran <br />' Ottobcr 28, 1998 <br />