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<br />I <br />~ AET #96-2601 - Page 3 <br />I SITE CONDITIONS. <br />, Logs of the test borings are attached. The logs contain information concerning soil layering , soil <br /> classification, geologic description and moisture. <br />, Existing Pavement <br />, The existing streets are bituminous surfaced, and the bituminous and apparent base thickness <br />I measured at each test location appears on the boring logs. Observable pavement distress is <br /> considered moderately severe, including zones of extensive cracking, surface distortion and <br />, patching. <br />'- Sub grade SoilS <br /> Subgrade soils in the Colleen Avenue area are predominantly sandy lean clays, which are either <br />, fill or natural tills. The soils predominantly meet the A-6 AASHTO Group Classification category. <br /> A-3 sands with silt appear in the upper 3' zone at Boring #6, although the pavement quality <br />, appears limited by the thin pavement section and the apparent lack of a base layer at this location. <br />, In the Hamline Avenue Service Road area, A-6 clays are again predominant. Boring #8 suggests <br />, sands with silt are present within the upper 2' subgrade zone at one location, but not the second <br /> location at Boring #9. <br />, Soil conditions are less favorable in the Snelling A venue Service Road area. Soils include silty <br />, clays, lean clays and fine grained silty sands. These soils meet the A-4 or A-6 AASHTO Group <br /> categories. Although the A-6 soils have the same group category as the other areas, they contain <br />, less sand and are judged to be less favorable subgrade soils than the A-6 soils at the other project <br /> locations. Boring #11 also includes a black clayey sand layer just below the base layer. <br />t <br />, <br />