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Home My WebLink AboutPermit Field Test & Inspection Report 2008-2-6 ~ , "\ g Feb. 7. 2008 8:55AM No. 2355 P 11/16 <3 ---' tc& / if!\ K & A Engineering, Inc. 3327 Roanoke Ave., Eugene, OR 97408 (541) 684-9399 Voice (541) 684-9358 FAX , enginl'ering February 6, 200S Hayden Enterprises, Inc. 2464 SW Glacier Drive #110 Redmond, OR 97756 Project; 151.06 SUbject: Jasper Meadows subdivision..Lot226 Springfield, OR Foundation Soils PURPOSE AND SCOPE At your request K & A Engineering, Inc. has completed a geotechnical investigation of the existing soils on the subject property. Our understanding is that a wood-framed single-family residence supported by a cast-in- place concrete spread footing foundation is proposed for construction on this site. . ~ The purpose of our investigation was to determine the suitability of the.soils for construction of the proposed . structure, and. provide recommendations for construction of the foundation. The scope of our services is limited to general suitability with respect to bearing capacity and expansive soils. FOUNDATION PAD PREPARATION The project site is located on a residential lot on the east side of 5Sth Street in the new" Jasper Meadows" subdivision. The site is mostly level and there are no apparent slope movement hazards. There is a drainage ditch just east of the subject site. Foundation preparation involved constructing a level foundation pad on native undisturbed soils~ This required excavating and removing approximately lto 2-feet of dark brown/black, wet, loose, organic silt. After the excavation and removal of the unsuitable subgrade,soils, approximately 10 to l8-inches of %-inch minus dense graded crushed aggregate vias placed and compacted in the foundation pad area. This served to provide a uniform surface for footing construction. The fill m~terials were placed, graded,and then compacted using a vibratory steel drum roller. We tested the in-place density of the crushed aggregate fill and have determined that the average dry density exceeds 95% of maximum as detemnined by ASTM D698. The field test results are attached to this report. . Feb. 7 2008 8:56AM. No. 2355 p, 12/16 K & A Engineering, Inc. SUMMARY AND RECOMMENDATIONS The prOject site, as prepared, is suitable to support the proposed foundations. We recommend a design allowable bearing capacity of 1,500-pounds per square foot. The soils present a moderate shriniyiswell hazard. Foundation loads should bear on undisturbed native silts a minimum depth of 24-inches below final grade around the perimeter foundation. The prepared foundation pad meets these recommendations. Final grading around the foundation pad should raise the grade above the foundation using native or imported silts and should slope away from the foundation~ We recommend approval of the foundation pad, .as constructed, by the building official. LIMITATIONS OF THIS REPORT This report has been prepared for the exclusive use of Hayden Enterprises, Inc. and its design consultants for the SUbject proposed structure. This'geotechnical investigation, analysis, and recommendations meet the standards of care of competent geotechnical engineers providing similar services at the time ,these services were provided. We do not warrant or guarantee these recommendations. site surface, or subsurface conditions. The scope of our services does ~ ---- -- ---- -not~include~construction~safety~precautions,techniques,seq uences,or 'procedures;except'as~specifically- recommended in this rep.ort. Our services should not be interpreted as an environmental assessment of site conditions. . Thank you for the opportunity 10 be of service. Please call us it you have questions or need further assistance. . Steve Schultz, En. K & A Engineering, Inc. EXPIRES I~. h-- I Client Hayden Enterprises Jasper Meadows-Lot 226, Springfield, OR Project: 151.06 Page 20f 2 February 6, 2008 . Feb, 7, 2008 8:56AM No,2355 P. 13/16 Density of Soil and Soli-Aggregates In-Place . ASTM D2922 and D3017 Project: 151.06 Sile Address: Jasoer Meadows,.Lot226 Permil No: Dale: 12,.'512008 Density Tesl TV{I8':IDT-6 OperalDr;ISS Malerlal Tvoe:13/4-inch minus dense graded crushed aggregate I MaxImum Dry Denstly, pcfJ128.0 I Standardization an~ Reference Chec~A Density ./ III Moisture, '/ . (Slandard Deviationall(S.D.', 0.61 (S.D:I 1.02 Moist' Dry , Density, Density, Wale' Compaction, Test No. pel pel Conlent. % % Remarks I 1 I 142,0 i 126.0 I 127 98.4% I 2 I 136.7 I 1210 I 13,0 94.5% 3 I 141,0 124,6 I 13.2 97.3% I I , I I 1- 1----1 ,~ I I I I I I I I I I I I I I J I I I J I I J I I J I I J I I j I , I I J I I J I I J I I I J Average: 96,8% Std. Dev.: 2.02% 1 Direct Transmission (OT) (specify depth, in~) or Air Gap Backscatter (AGB) (specifiy(T)ouchable oi (U)ntouchable mode Test performed USing Seaman Nuclear Corp model C;300, SN 21113 Client: Hayden Enterprises. Inc. Project: 151 06 K & A Engineering, Inc. 2/6/2008