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<br />base of the rail. Coordination with railroad officials shall <br />begin when the river starts rising, especially if it is known <br />that heavy rains are occurring in the river's upstream basin. <br />Preparation, consisting of mobilization of operating personnel, <br />removal of logs, required hardware, tools, etc., from place of <br />storage to area im",ediately adjacent to structure, should be done <br />simultaneously in order to accomplish closure before flooding <br />conditions arrive. Closure of the stoplog structure shall be <br />accomplished as follows: (See Plate No.2.) <br /> <br />l. <br />Bearing <br />faces. <br /> <br />Install and clamp steel support frame on railroad tracks. <br />face of frame should line up with retaining wall support <br />Frame should be as nearly vertical as possible. <br /> <br />2. Place stop logs against frame and concrete wall and insert <br />3-inch by 6-inch by 3-foot, 6-inch wood spacers between logs and <br />wall recesses to fill voids and keep logs centered. StOp logs are <br />units of four, 3-inch by 6-inch by 22-foot timbers which are <br />bolted together. Each unit is provided with eyebolts for handling <br />with a sling. Two slings are provided, one for spare. <br /> <br />3. Bolt steel angles snug against stoplogs and spacers on <br />retaining wall as height of the logs rises. <br /> <br />4. When logs reach their maximum height (about 10 feet above <br />top of rail), tie down using eyebolts anchored in concrete walls <br />and chains provided for this purpose. <br /> <br />5. To remove the structure, follow steps 1 through 4 in <br />reverse sequence and return to place of storage. <br /> <br />b. Haintenance. The closure structure components shall be <br />inspected by the superintendent every 90 days to be certain that: <br /> <br />1. No parts are IT.issing; <br /> <br />2. Metal parts are adequately covered with paint; <br /> <br />3. All movable parts are in satisfactory working order; <br /> <br />4. Wooden logs are not badly warped. <br /> <br />Tools and parts shall not be removed for other use. Closure <br />structure materials will be carefully checked prior to and <br />following flood periods, and damaged or missing parts shall be <br />repaired or replaced immediately. <br /> <br />c. Listing of stop log parts: <br /> <br />1. Support frame: <br /> <br />III-4 <br />