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Home My WebLink AboutMiscellaneous Field Test & Inspection Report 2008-7-30 . JU I. J I LVVO 0: JOMIVI l~o,L/Uj r, ~/IU ,. ,; ea... K & A Engineering, Ine, 3327 RoanOke Ave" Eugene, OR 97408 (541) 684-9399 Voice (541)684-9358 FAX engineering July 30,2008 . Project: 151.06 Hayden Enterprises, Inc, 2464 SW Glacier Drive #110 Redmond, OR 97756 . Subject: Jasper Meadows subdivision--LoMl5&- Springiield, OR ~57PU_'t~ PL Foundation Soils PURPOSE AND SCOPE , ' L 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 sunability 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 in the Jasper Meadows subdivision on the south side of Pumice Place, The lot is mostly level and there are no apparent slope movement hazards, The original ground surface was low lying and poorly drained. Based on the foundation pad excavation, native soils consist of approximately 2 to 3-feet of darK brown, wet, loose, organic silt, over gray/tan/orange, wet, moderately stiff, plastic clay with inclusions of decomposed sandstone, Foundation support preparation involved constructing a level foundation pad on a subgrade consisting of native undisturbed soils, This required excavating and removing approximately 2 to 3.feet of dark brown organic silt from the foundation pad area, After the excavation and removal of the uQsuitable soils, approximately 3 to 5- feet of %-inch minus dense graded crushed aggregate was placed, graded, and compacted on the loundation pad. This served to provide a uniform surtace for footing construction at the desired elevation. The fill materials were placed and then- compacted using a vibratory steel drum roller. .. . We tested the in"place density of the %-inch minus dense graded crushed aggregate fill and have determined that the average dry density exceeds 95-percent of maximum as determined by ASTM 0698. The field test results are attached to tIlis report. JUl. 51 LVV~ O:50AI~ NO,L/Vj ~. ~/IU 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 2.000-pounds per square fool. The soils present a moderate shrink/swell hazard, Foundation loads should bear on undisturbed native silts a minimum depth of 36-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 apprDval Dfthe foundation pad, as constructed, by the building official. Thank you for the opportunity to be of service, Please call us if you have Questions or need further assistance, Respectfully, w6Jj/ Steve Schultz, E.i.T, K & A Engineering, Inc, , J Clienl. Hayden Enterprises Jasper Meadows-Lot 258, Springfield, OR Project: 151.06 Page 2 of2 . July 30, 2008 oJUI. J I. LVVU U. JUMIVI . I~ 0: L I V j r. I VI IV . ' ' Density of Soil and Soil-Aggregates In-Place ASTM D2922 and 03017 . .' I proJect:/'5,.06 j I Site Address: Jasper Meadows--Lol 258 I I Permit No: I J I Date: 17/30/2008 J ,I Oenslty Test Type':IDT-4,6 j I Operator:ISS J I Material Type:13/4" (-) from Springfield QuarTY' J I Maximum Dry Densliy, pcll1300 J I Standardization and Reference CheC~D. Density I 16 Moisture, I I (Standard Deviations) (S.D,) 189 (S.D:), 0.02 Moist Dry Density, Density, Water Compaction, Test No, pcl pct Content, % % Remarks I 1 I 1389 I 132.2 I 5.1 101.7% I 2 I 148.0 I 1378 I 7.4 I 106,0% 3 I 132,7 I 125,9 I 5.4 I 96,8% j I I i I I I I I I I I , , I J I I I J I I i I I I. I I I J I I I I I I I I I I I I I I J I I I I J I I I I J I I I I J I I I' I J I I I I I I I I I I I I I I --J I I I J I I I I j Average: 101,5% SId, Dev.: 4.58% 1 Direct TraIlsmission (DT) (specify depth, in.) or Air Gap Backscatter (AGS) (specifiy(T)ouchable or (U)ntouchable mode Test performed using Seaman Nuclear Corp model C-300, SN 21113 Client: Hayden Enterprises, Inc, Project: 151.06 K & A Engineering, lnc, 713012008