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Table 1. Summary of Existing Roadway Section <br />Boring <br />Number <br />Approximate <br />Bituminous <br />Thickness <br />(inches)t <br />Approximate <br />Aggregate Base <br />Thickness <br />(inches)t <br />Subgrade Soil Type <br />Vanadium Street between Green ValleyRoad and 180th Lane <br />SB-1 <br />21/2 <br />4 <br />SM <br />S13-2 <br />21/2 <br />6 <br />SM <br />SB-3 <br />2 (estimated) <br />4 <br />CL-CH <br />S13-5 <br />21/2 (estimated) <br />4 <br />CL <br />SB-6 <br />21/2 (estimated) <br />4 <br />SM <br />178th Lane NW from about 300 feet west of Vanadium Street to Uranium Street <br />S13-4 <br />13/4 <br />3 <br />SC-SM <br />SB-13 <br />3 <br />3 <br />SM <br />180th Lane NW between Vanadium Street and Uranium Street <br />SB-07 2 3/4 1 4 Sc <br />Uranium Street from about 150 feet north of 180th Lane NW to 1781h Lane NW <br />SB-8 <br />2 <br />4 <br />SC-SM <br />SB-9 <br />2 to 4 (estimated) <br />4 <br />CL-CH <br />SB-10 <br />21/2 <br />3 <br />CL <br />SB-12 <br />21/2 <br />4 <br />CL-ML <br />179th Lane NW from Uranium Street to about 300 feet east <br />SB-11 <br />3 3/4 <br />1 4 <br />CL <br />177th Lane NW from Vanadium Street to end <br />SB-14 <br />2 <br />1 4 (estimated) <br />SM <br />SB-15 <br />2 assumed <br />4 <br />SP-SM <br />Waco Street from 179th Lane NW to north end of Waco Drive <br />SB-16 <br />2 3/4 <br />4 <br />SP <br />SB-17 <br />13/4 <br />3 <br />SP <br />SB-18 <br />21/4 <br />5 <br />SP <br />Waco Drive <br />SB-19 21/4 5 SP <br />180th Ave NW from Barium Street to about 300 feet east <br />SB-20 2 7 (Possible) SP-SM <br />Barium Street from 1791h Lane NW to end <br />SB-21 <br />21/4 <br />3 <br />SP-SM <br />SB-23 <br />2 <br />5 <br />SP-SM <br />SB-24 <br />2 <br />13 <br />SP-SM <br />1801h Avenue NW from Barium Street to end <br />SB-22 <br />21/2 estimated <br />6 j <br />SP <br />SP = Poorly Graded Sand SP-SM = Poorly Graded Sand with Silt SM = Silty Sand <br />CL-CH = Lean to Fat Clay CL = Lean Clay or sandy lean clay SC-SM = Silty Clayey Sand CL-ML = Silty Clay <br />Fill and Possible Fill Soil borings SB-1, SB, SB-4, S13-6, SB-7, SB-8, and SB-14 encountered Fill or <br />Possible Fill that extended to about 41/2 to 91/2 feet below the ground surface. The Fill consisted of <br />silty sand, poorly graded sand with silt, silty clayey sand, clayey sand, and poorly graded sand <br />that was grey to greyish brown or brown to dark brown in color. <br />M <br />