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<br />Exhibit 30. Reinforcing steel exposed in concrete <br />pipe due to concrete deterioration................ 41 <br /> <br />Exhibit 31. Standard SI&A Form--Examp1e shown is for <br />a two-barrel reinforced concrete box <br /> <br />culvert........................................... 46 <br /> <br />Exhibit 32. Sample inventory card............................. 49 <br /> <br />Exhibit 33. Culvert inspection report......................... 52 <br /> <br />Exhibit 34. Standard prepared sketches (adapted from <br />North Carolina inspection forms).................. 54 <br /> <br />Exhibit 35. Sample sketch.................................... 55 <br /> <br />Exhibit 36. A line indicating a culvert centerline............ 56 <br />Exhibit 37. Undermined toe-wa11............................... 57 <br /> <br />Exhibit 38. Undermined toe-wa11............................... 57 <br /> <br />Exhibit 39. Sketch of undermined toe-wall..................... 58 <br /> <br />Exhibit 40. Maintenance rating scale.......................... 62 <br /> <br />Exhibit 41. Roadway defect may be an indication of <br />distress in the culvert........................... 65 <br /> <br />Exhibit 42. Headwall and wingwa11 end treatment............... 67 <br /> <br /> <br />Exhibit 43. Corrugated metal pipe arch with undermining <br /> <br />and scour......................................... 68 <br /> <br />Exhibit 44. A dip in the guardrail or approach <br />roadway may be due to excessive deflection <br /> <br />in culvert......................................... 72 <br /> <br />Exhibit 45. Pavement failure due to inadequate <br />compaction or material quality adjacent <br />to flexible pipe...................................72 <br /> <br />Exhibit 46. Pavement failure due to inadequate <br />compaction or material quality adjacent <br />to rigid pi pe. .... . . . .. .. .. ... ... . .. .... .. ... . .. ...73 <br /> <br />Exhibit 47. Pavement patches and pavement distress <br />beside culvert. Distress is being caused <br />by embankment spilling over wingwa11...............74 <br /> <br />vi <br />