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<br />I <br />1-.. <br />,._..l <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />, <br /> <br />I <br />I <br /> <br />EXHIBIT V-B, 1 of 2 <br /> <br />Outline for Discussion at Interdisciplinary Team Mee~inq <br /> <br />Bridqe , <br />Descriptive Location <br /> <br />Stream <br /> <br />County <br /> <br />Present: <br /> <br />Date <br /> <br />I. Evaluation of Critical Scour <br />A. Scour Potential. <br /> <br />1. Results of evaluation of scour equations. <br />2. Critical structure (pier, abututment). <br />3. Scour history of bridqe. <br />a. Inspection records. <br />b. Maintenance work. <br />4. Scour protection inplace. <br />5. Scouribility of bed material. <br /> <br />B. Mode of failure. <br />1. Type of bridqe. <br />2. Critical scour depth. <br />3. Catastrophic or repairable. <br />4. Timinq (Sudden or Gradual). <br />5. Warninq siqns of imminent failure. <br /> <br />II. Scour Mitiqation Measures <br /> <br />A. Monitorinq and Inspection. <br />1. Durinq flood event. <br />a. Warninq of hiqh flow. <br />1) Flood forecast from snowmelt. <br />2) Intense rainstorm over drainaqe area. <br />b. M(,>1"i~"r <br />1) Local probinq from deck. <br />2) Fixed instrumentation. <br />3) Mobile sonic devices. <br />c. Mitiqation <br />1) Remove debris. <br />2) Emerqency riprap placement. . <br />3) Close bridqe. <br />2. Before/after flood event. <br />a. Borinq devices to determine extent of scour. <br />b. Underwater inspection of footinqs. <br />c. Visual inspection of slopes, riprap and structure. <br />d. Maintain history of channel cross-section and . <br />profile near bridqe. <br /> <br />B-21 <br />