Laserfiche WebLink
June 13, 2023 <br />HWA Project No. 2022-188-21 <br />Table 4. Recommended Pavement Layer Thickness for Southeast Area <br />Material <br />Description <br />Minimum Pavement Layer Thickness <br />(inches) <br />WSDOT Standard <br />Specification <br />HMA' <br />7.0 <br />9-02.1(4) <br />CSBC2 <br />6.0 <br />9-03.9(3) <br />Select Borrow <br />9.01 <br />9-03.14(2) <br />(1) HMA: Hot Mix Asphalt: Binder Grade PG 64H-28. HMA shall be placed in 2 lifts. <br />(2) CSBC: Crushed Surfacing Base Course, compacted as specified. <br />0) Thickness of Select Borrow may be reduced if base of over -excavation and replacement with <br />CSBC is at least 22 inches below the top of new roadway. <br />Table 5. Recommended Pavement Layer Thickness for Northeast Area <br />Material <br />Description <br />Minimum Pavement Layer Thickness <br />(inches) <br />WSDOT Standard <br />Specification <br />HMA' <br />7.0 <br />9-02.1(4) <br />CSBC2 <br />6.0 <br />9-039(3) <br />Select Borrow <br />9.01 <br />9-03.14(2) <br />0) HMA: Hot Mix Asphalt: Binder Grade PG 64H-28. HMA shall be placed in 2 lifts. <br />t2 <br />1 CSBC: Crushed Surfacing Base Course, compacted as specified. <br />(1) Thickness of Select Borrow may be reduced if base of over -excavation and replacement with <br />CSBC is at least 22 inches below the top of new roadway. <br />2022-188-21 KCTS — Final Geotechnical Report 19 HWA GEOSCIENCES INC. <br />