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Perimeter @ 0 +21.0 43.0 <br />Perimeter @ 0 +20.3 43.0 <br />Perimeter @ 0 +16.4 42.0 <br />Perimeter @ 0 +13.8 44.0 <br />TOTALS <br />Terry Tunnel Near Surface Bulkhead <br />Perimeter Area Irregularity <br />P Pave D P <br />43.0 0.7 0 0 30.1 <br />42.5 3.9 23.0 89.7 165.75 <br />43.0 2.6 12.25 31.85 111.80 <br />121.55 307.65 <br />For the perimeter area between Section 0 +13.8 and Section 0 +21.0 <br />Perimeter Area Irregularity = 121.55/307.65 = 39.5% <br />The perimeter area irregularity of 39.5% is greater than the 8% required to develop the <br />design strength of the bulkhead. <br />