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<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 />I <br />I <br />I <br />I <br /> <br />Lesson 5 <br /> <br />Culvert Failures - Participant Workbook <br /> <br />5.1 INTRODUCTION <br /> <br />INTRODUCTION <br /> <br />. CULVERTS FAIL FOR MANY REASONS <br />. FAILURE MAY OCCUR AT THE: <br />-INLET <br />- ALONG THE BARREL <br />- OUTLET <br />. FHWA NOTICE N 5040.3 <br /> <br />5.1 Introduction <br /> <br />Culvert failures are many and varied. They may be generally classified as those <br />at the culvert inlet, along the barrel, and at the culvert outlet. The Federal <br />Highway Administration (FHWA) recognized these problems and issued FHWA <br />Notice N 5040.3 that illustrated some failures and gave possible ways to prevent <br />them from occurring. <br /> <br />5.2 CASE STUDIES <br /> <br />CASE STUDIES <br /> <br />. AS A GROUP EXERCISE, REVIEW A <br />FAILURE CASE STUDY <br />. EACH GROUP WILL <br />- ESTABLISH THE CAUSE OF THE FAILURE <br />- SUGGEST WAYS TO PREVENT THE <br />FAILURE <br />- REPORT BACK TO THE CLASS <br /> <br />5.2 Case Studies <br /> <br />5-3 <br />