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Project No. JB-20100 <br /> 4 December 2000 <br /> Page 12 <br /> be necessary to direct all water collected from roof downspouts into closed <br /> conduits that lead to acceptable discharge points away from the structures. <br /> Grades should be such that drainage is away from the structures. Water and <br /> sewer utility lines should be properly installed to avoid becoming possible <br /> sources for subsurface saturation. It is important that all utility trenches be <br /> properly backfilled. If practicable, planters and/or landscaping should not be <br /> adjacent to or near the structures. If vegetation must be planted adjacent to <br /> or near structures, plants that require very little moisture with drip irrigation <br /> systems should be used. Sprinkler heads should not be placed where they <br /> could saturate foundation soil. <br /> 5.7 Pavements <br /> Based on the laboratory R-value test result of 18, we recommend the <br /> pavement sections listed in Table 4. <br /> Table 4 <br /> PAVEMENT DESIGN CRITERIA <br /> TRAFFIC INDEX ASPHALT AGGREGATE BASE <br /> (inches) lmml (inches) (mm) <br /> Flexible Pavement <br /> 5.0 3 80 71h 190 <br /> 5.5 3,2 90 8'/2 215 <br /> 6.0 3'2 90 10 255 <br /> _ 6.5 4 105 11 280 <br /> 7.0 4 105 12''A 320 <br /> + Full Depth Asphalt Concrete <br /> 5.0 7 180 -- -- <br /> 5.5 Th 190 -- -- <br /> i <br /> 6.0 81/2 215 -- -- <br /> 1 6.5 9 230 -- -- <br /> J 7.0 91/2 245 -- -- <br /> Rigid Pavement CONCRETE AGGREGATE BASE <br /> (inches) (mm) (inches) (mm) <br /> Concrete Pavement 6 155 <br /> The recommended sections are based on the above assumed Traffic Indices <br /> (TI). The recommended pavement section should be revised if site grading <br /> changes the characteristic of the near surface soil condition or a different TI <br /> is desired. <br /> MKorbmacher Engineering, Inc. <br />