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<br />Exhibit 48. Pavement patches and distress same <br />location as exhibit 47..............................75 <br /> <br />Exhibit 49. Example of vehicle safe grate on safety <br />treated headwa 11 . ... .. . .. .... .. . ... .. .. .. .. . . .. . ...76 <br /> <br />Exhibit 50. Projecting end treatment on corrugated <br />meta 1 pipe c u 1 ve rt. . . . . . . . .. . . . . .. . . . .. . . . .. . . . . . . . 77 <br /> <br />Exhibit 51. Slope paving used to protect mitered end...........78 <br /> <br />Exhibit 52. Culvert appurtenant structures..................... 79 <br /> <br />Exhibit 53. Voids around outside of pipe indicate <br />possible piping. Shape distortion has <br />occurred.. ... ... . ... .. ... ... . .. . .. . .. .. . . ... ... . .. .80 <br /> <br />Exhibit 54. End section drop off...............................81 <br />Exhibit 55. Mitered end of culvert turned up due to <br /> <br />bouyant forces..................................... 81 <br /> <br />Exhibit 56. Damage due to bouyant forces.......................82 <br /> <br />Exhibit 57. Impact damage to end of concrete pipe..............82 <br /> <br />Exhibit 58. <br />Exhibit 59. <br />Exhibit 60. <br />Exhi bit 6l. <br />Exhi bit 62. <br />Exhi bit 63. <br />Exhi bit 64. <br />Exhibit 65. <br />Exhi bit 66. <br /> <br />Erosion around mitered end.........................83 <br /> <br />Condition rating guidelines....................... .85 <br /> <br />Scour at outlet of masonry culvert................ .87 <br /> <br />Embankment eros i on. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87 <br /> <br />Condition rating guidelines....................... .89 <br /> <br />Culvert failure due to overtopping.................90 <br /> <br />Culvert almost completely blocked by <br />sediment accumulation............................. .91 <br /> <br />Drift and debris inside timber box culvert.........91 <br /> <br />Checking curvature by curve and middle <br /> <br />ordinate.......................................... .91 <br /> <br />Exhibit 67. Surface indications of infiltration................95 <br /> <br />Exhibit 68. Surface hole above open joint......................96 <br /> <br />vii <br />