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<br />Mr. Jim Herron Pale ? <br />• <br />Belt Specifications: <br />1. The belt gallery will consist of 35- to 40-feet-long sections of <br />conveyor gallery elevated on bents to provide minimum ground clear- <br />ance of 10 feet. Elevation of the belt is necessary because the <br />four to five feet of winter snow depth would prevent satisfactory <br />belt maintenance. <br />2. Design is for a 36 inch wide belt. Present systems consist of -- <br />36 inch and 24 inch belts in series. Although a 24 inch wide belt <br />would have excess capacity for the design refuse disposal rate, a <br />36 inch wide conveyor was selected to provide additional protection <br />against temporary overloading and belt spillage resulting from <br />overload. Belt speed will be + 350 feet/minute. Conservative <br />carrying capacity is 450 tons/hour or 75 percent of plant raw coal <br />design capacity of 600 tons/hour. <br />3. The belt drive, located in the transfer tower, is designed for a <br />180o wrap which eliminates the need for a "snub" pulley on the <br />"dirty" side of the belt adjacent to the drive pulley. This design <br />allows the installation of a minimum of two belt wipers adjacent to <br />the drive pulley before the dirty side of the belt contacts return <br />hardware. <br />4. The belt drive and wipers will be enclosed in a heated house to <br />prevent ice buildup. on the wipers in freezing weather. <br />5. It is our intention to vulcanize most of the belt splices to reduce <br />splice spillage and wear and tear on the belt wipers. <br />6. The belt will be tensioned by a gravity take-up located inside the <br />plant structure so as to be protected from freezing conditions. <br />7. The bents supporting the belt structure will be supported on pile <br />footings andJor spread footings. <br />8. The belt structure will use bolted connections between bents and <br />conveyor structure that will facilitate removal of the belt and <br />re-use of the structure when no longer needed. <br />It appears that the 36-inch plant refuse conveyor is well within the <br />criteria established for minor revision and can properly be considered for <br />same. Your prompt decision is vital to us because we need to schedule <br />installation of the belt to coincide with the plant vacation shutdown this <br />summer, and the other work we plan to do at the plant during this period. <br />Please advise if additional information is needed. Thank you. <br />Sincerely; 7 <br />• ---- _ <br />"~~ice Dresident <br />J:~-:Tu:ne::Ts <br />r.nC iOjur °5 <br />6 <br />