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Home My WebLink AboutB14-0307 REV1 Open Hole Soils Report.pdfTOWllOF9 Department of Community Development 75 South Frontage Road Vail, CO 81657 Tel: 970.479.2128 www.vailgov.com Development Review Coordinator TRANSMITTAL FORM Use this form when submitting additional information for planning applications or building permits. This form is also used for requesting a revision to building permits. A two hour minimum building review fee of $11 O will be charged upon reissuance of the permit. Application/Permit #(s) information applies to: Attention: O Revisions I(" 3 2 Eh f/i! {})r df S~1//ft-frk~ Q Response to Correction Letter D_attached copy of correction letter Q .. · Deferred Submittjk / 4 r c;)Other o a~" o /<"" for Project Street Address: , . /J / I { 5'Z 5 '-< fi/r,-(~j h/ (Number) (Street) (Suite#) Building/Complex Name: --'-a--'0'--~--a,_· _,~"'"a""..--'~-'. --'. ,....-:_"_.;;.?_"" ____ _ Applicant Information (architect, contractor, owner/owner's rep) Contact Name: !fr /c,,_ ~~·,-?ere,,,,...- Address: i'f t 1-/;71"~~/' Pr 5/1/k ?I/ City i.-:1i I State: {'C) Zip: 8/65 / Contact Name: ------------------ 7 Description of Transmittal/ List of Changes, Items Attached: C'.P'e/z. /~k __So;,6 Lt,/or/ ~ 7 Gr ~c:Vq/ 0 --E ' (use additional sheet if necessary) f7o)_57G-8f8l' Contact Phone: ----''---_..,,..-'---"':_:_--"''--"-'-"'--L..--------. Building Permits: & 5 . I l / / Revised ADDITIONAL Valuations (Labor & Materials) Contact E Mal·1..r/c:,-£-.._,, o/c ,,.. /c;~, • c~11~ -· ---~'-~·-=c-::=-="'-----"-_ __. _______ . (DO NOT include original valuation) I hereby acknowledge that I have read this application, filled out in full the information required, completed an accurate plot plan, and state that all the information as required is correct. I agree to comply with the information and plot plan, to comply with all Town ordinances and state laws, and to build this structure according to the town's zoning and subdivision codes, design review ap- proved, International Building and Residential Codes and other ordinances of the Town a litable thereto. x ~,-/_,,,.~ Owner/Owner's For Office Use Only: Fee Paid:------------------- Received From: ----------------- Cash---------Check#-------- CC: Visa I MC Last 4 CC # exp. date: ____ _ Authorization#----------------- Building: $ Plumbing: $ Electrical: $ Mechanical: $ Total: $0 Date Received: OCT O 9 2014 TOWN OF VAIL October 7, 2014 Elk Meadows Development, LLC Attn: Brian Redinger 141 East Meadow Drive, Suite 211 Vail, Colorado 81657 hyi:111:u :-,nl:11is\ ailcrn11 Job No. 114 086A Subject: Dear Brian: Observation of Excavation, Proposed Residence, Lot 5, Elk Meadows Subdivision, 1632 Buffehr Creek Road, Vail, Colorado As requested, a representative of Hepworth-Pawlak Geotechnical, Inc. observed the excavation at the subject site on September 24, 2014 to evaluate the soils exposed for foundation support. The findings of our observations and recommendations for the foundation design are presented in this report. We previously prepared a subsoil study for design of foundations at Lot 5 and presented our findings in a report dated July 11, 2014, Job No. 114 086A. The observation of the Lot 5 building excavation was performed as additional services to our proposal for geotechnical services to Elk Meadows Development dated March 24, 2014. The proposed residence will be similar to that described in our previous report and be a two-story wood frame structure above a walkout lower level with a slab-on-grade ground floor. Spread footings placed on the natural soils and sized for an allowable bearing pressure of 1,200 psf were recommended for the building foundation support. At the time of our site visit, the foundation excavation was essentially complete and had been cut in multiple levels from about 4Y:z to 14 feet below the adjacent ground surface. The steps in grade between the levels ranged from about 1 to 3 feet. The soils exposed in the bottom of the excavation consisted of medium dense, cJayey to very cJayey silty sand and generally stiff, very sandy silty cJay. Results of swell-consolidation testing performed on samples taken from the site, shown on Figure 1, indicate the soils are moderately compressible under conditions of loading and wetting with a minor hydro- compression potential. No free water was encountered in the excavation and the soils were slightly moist to moist. The soil conditions exposed in the excavation are consistent with those previously encountered on the site and suitable for support of spread footings designed for the recommended allowable bearing pressure of 1,200 psf with some risk of settlement due • 4 i i I' • I. .1 ,, l I . I i ';' '.·I Elk Meadows Development, LLC October 7, 2014 Page 2 primarily to the compressible nature of the soils. Loose and disturbed soils should be removed in the footing areas to expose the undisturbed natural soils and the subgrade compacted. Other recommendations presented in our previous report which are applicable should also be observed. On September 12 and 15, 2014, we visited the site to observe construction of the driveway to Lot 5. On September 12, we observed the topsoil and several feet of soft dark soil to have been removed from the driveway area with cuts from about 4 to 7 feet below adjacent ground surface. It was proposed to level the exposed subgrade with a 1 to 2 feet depth of imported silty sand with gravel and cobbles from a lodge excavation in western main Vail, prior to placing a Tensar geo-grid and imported COOT Class 2 (minus 3 inch) base course to pavement base course elevation. The import material was tested for gradation (minus 3 inch fraction) and Atterberg limits, see attached Figure 2 for test results, and determined to be suitable for this use. When we returned to the site on September 15, the imported silty sand with gravel and cobble material had been placed and well compacted, and the geo-grid had not been placed. The fill subgrade appeared generally firm and suitable to place the geo-grid and several feet of COOT Class 2 road base as planned. The recommendations submitted in this letter are based on our observation of the soils exposed within the foundation excavation and the previous subsurface exploration at the site. Variations in the subsurface conditions below the excavation could increase the risk of foundation movement. We should be advised of any variations encountered in the excavation conditions for possible changes to recommendations contained in this letter. Our services do not include detennining the presence, prevention or possibility of mold or other biological contaminants (MOBC) developing in the future. If the client is concerned about MOBC, then a professional in this special field of practice should be consulted. If you have any questions or need further assistance, please call our office. Sincerely, David A. Young, P.E. DAY/ksw attachment Job No. l l 4 086A Moisture Content = 13.1 percent Dry Density = 110 pcf Sample of: Very Clayey Silty Sand with Gravel From: Bottom of Lot 5 Excavation a r---------1 --- I -~ "" Compression '#. "' V upon ..._, wetting z 2 0 " !'-... L--!.; ...... en I- ff3 3 r\ 0: CL \ :=,;: '\ 0 0 4 ' 5 \~ 0.1 1.0 10 100 APPLIED PRESSURE { ksf) 114 086A ~tech SWELL-CONSOLIDATION TEST RESULTS FIGURE 1 HEPWORTH-PAWLAK GEOTECHNICAL Particle Size Distribution Report .s £i . £i .E .5 .s .5 0 0 8 ~ 0 .5 ;:<: 0 i i ~ ;:<: ~ :jt ~ N i ; ; <D ~ N -,.... ;;::t "" 100 I ~~ II I I II II II I I I I II I I 'i'I I I I I I I I I I I I I I 90 I '""\ I Ii I 'I I I I I II I I I ~ N' I I I I I I I I I I I I I I I I I I I 80 I 11 ' 11 I ;I I I I I II I I I I I I ~~ I I I I l I I 70 J j I I I I !'"" 1 I I I I I I I I I I I I I ~ ..... ~ I I I I I I 0:: I I I I I I I I I I I J I I w 60 1 ' II I z \1 I I u::: I I I I I I I I I I I I I I-I I I I I I I I I I I I I I z 50 I I J I I 1 I I I II w ,~ () j J I I I I I I I I I I I 0:: 40 I II l I II l II r I I I I I II w ~I\( a. I I I I I I I I I I I 1 1 I I I I I I I I I \. I I I I 30 I I I I I I I 1 I I I ii I I I I I I I I I I } I I l 20 I I I I I I l'io...l I 'I I j I I l I I I I l I N u I I I I I I I I I I I I I ~ 10 J I l I I I I I I I I I I I I I I I I I I I 0 I I I I I I I I I I I I I I 100 10 1 0.1 O.Q1 0.001 GRAIN SIZE -mm. %+3" %Gravel %Sand % Fines Coarse Fine Coan1e Medium I Fine Silt Clay 0 14 16 7 29 I 18 16 SIEVE PERCENT SPEC.* PASS? Material Dncriptiori SIZE FINER PERCENT (X=NO) Silty Sand with Gravel 3 100 1.5 91 .75 86 Att~rberg Limits .375 78 #4 70 PL= NP LL= NV Pl= NP #8 65 Coefficients #16 55 Ds5= 17.0790 0 60= I.5810 D50= 0.9172 #30 41 D30= 0.3396 015= D10= #50 28 Cu= Cc= #100 20 Classificatlon #200 16 USCS= SM AASHTO= A-1-b Bemarks -(no specification provided) Location: Stockpiled Import from Vail Sample Number: 173-14 Date: 09/ 12/2014 Hepworth-Pawlak Client: Elk Meadows Development, LLC Geotechnical, Inc. Project: Lot I, Elk Meadows Subdivision, Buffehr Creek Road, Vail, Colorado Glenwood Springs, Colorado ProJect No: 114086A Flaure 2 Tested By: ~K=O=----------Checked By: =D~AY'-'-·-· _· ·_·'-------