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Home My WebLink AboutJEFFERSON COMMONS PUD - FINAL - 50-95A - SUBMITTAL DOCUMENTS - ROUND 1 - GEOTECHNICAL (SOILS) REPORT1 GEOTECHNICAL ENGINEERING REPORT PROPOSED STUDENT HOUSING WEST ELIZABETH STREET FORT COLLINS, COLORADO Project No. 20965032 March 27, 1996 INTRODUCTION Terracon This report contains the results of our geotechnical engineering exploration for the proposed student housing complex to be located on West Elizabeth Street, Fort Collins, Colorado. The site is located in the Northeast 1/4 of Section 16, Township 7 North, Range 69 West of the 6th Principal Meridian. The purpose of these services is to provide information and geotechnical engineering recommendations relative to: • subsurface soil and bedrock conditions • groundwater conditions • foundation design and construction • lateral earth pressures • floor slab design and construction • pavement design and construction • earthwork • drainage The conclusions and recommendations contained in this report are based upon the results of field and laboratory testing, engineering analyses, and experience with similar soil conditions, structures and our understanding of the proposed project. PROPOSED CONSTRUCTION Based on information provided JPI Development Partners and Gefroh Hattman Architects, the proposed apartments will be three-story, wood frame structures founded at grade on post -tensioned slab -on -ground foundations. In addition to the thirteen apartment structures, an information center, and pool will be constructed near the south end of the site. Parking and drive areas will be constructed throughout the project area. Tennis and basketball courts are planned in the northeast comer of the site. West Elizabeth Street will be improved adjacent to the south .side of the property, and Orchard Place will be extended 1 N Geotechnical Engineering Exploration JPI Development Partners Project No. 20965032 TABLE OF CONTENTS (cont'd) APPENDIX A Site Plan and Boring Location Diagram Logs of Borings APPENDIX B Laboratory Test Results APPENDIX C General Notes Terracon 2 Terracon TABLE OF CONTENTS Page No. Letterof Transmittal.............................................................................................................ii INTRODUCTION.................................................................................................................1 PROPOSED CONSTRUCTION..........................................................................................1 SITE EXPLORATION..........................................................................................................2 FieldExploration.......................................................................................................2 LaboratoryTesting.................................................................................................. 3 SITECONDITIONS.............................................................................................................3 SUBSURFACE CONDITIONS............................................................................................4 Geology................................................................................................................... 4 Soil and Bedrock Conditions................................................................................... 4 Field and Laboratory Test Results........................................................................... 5 Groundwater Conditions.......................................................................................... 5 CONCLUSIONS AND RECOMMENDATIONS....................................................................6 Geotechnical Considerations...................................................................................6 Post -Tensioned Slab Foundation Systems..............................................................6 BoxCulvert ..............................................................................................................7 Lateral Earth Pressures...........................................................................................7 Seismic Considerations........................................................................................... 8 Pavement Design and Construction........................................................................ 8 Tennis and Basketball Courts..................................................................................11 Earthwork................................................................................................................13 Site Clearing and Subgrade Preparation.....................................................13 Excavation...................................................................................................14 FillMaterials.................................................................................................15 Placement and Compaction.........................................................................16 Shrinkage.....................................................................................................16 Slopes..........................................................................................................17 Compliance............................................................................................:.....17 Excavation and Trench Construction...........................................................18 Drainage..................................................................................................................18 SurfaceDrainage.........................................................................................18 Subsurface Drainage...................................................................................19 Additional Design and Construction Considerations................................................19 Exterior Slab Design and Construction........................................................19 Underground Utility Systems........................................................................19 CorrosionProtection.................................................................................... 20 Swimming Pool Design and Construction.................................................... 20 GENERALCOMMENTS.....................................................................................................20 March 27, 1996 JPI Development Partners 600 East Las Colinas Boulevard Irving, Texas 75039 Attn: Mr. Patrick Rhamey Re: Geotechnical Engineering Report Proposed Student Housing, West Elizabeth Street Fort Collins, Colorado Project No. 20965032 Irerracon CONSULTANTS WESTERN, INC. EMPIRE DIVISION P.O. Box 503.301 N. Howes Fort Collins, Colorado 80522 (970)484-0359 Fax (970) 484-0454 Larry G. O'Dell, P.E. Nell R. Sherrod, C.P.G. Terracon Consultants Western, Inc., Empire Division has completed a geotechnical engineering exploration for the proposed student housing project to be located between West Elizabeth Street on the.south and Orchard Place on the north, west of South Taft Hill Road in Fort Collins, Colorado. This study was performed in general accordance with our proposal number D2596043 dated February 20, 1996. The results of our engineering study, including the boring location diagram, laboratory test results, test boring records, and the geotechnical recommendations needed to aid in the design and construction of foundations and other earth connected phases of this project are attached. The soils at the site consist of lean clays with sands, sandy lean clays and silty and/or clayey sands with gravels. The upper subsoils are underlain by siltstone/claystone bedrock at depths of 311 to 131,2 feet. Based on the structures proposed and the subsurface conditions encountered, it is our opinion the proposed post -tensioned slab -on -ground foundation construction is feasible. Further details are provided in this report. We appreciate the opportunity to be of service to you on this phase of your project. If you have any questions concerning this report, or if we may be of further service to you, please do not hesitate to contact us. Sincerely, TERRACON CONSULTANTS WESTERN, INC. Empire Division Prepared by: r N i R. Sh / Senior Engineering Geologi Copies to: Addressee (6) Gefroh Hattman 00600 Q � pOOueg WP� o'�o��,n,AiR& ti� E a 18829 ••0 8 e lam J. Attwooll, P.E. -P % Qm�a§ ®� re Manager% A Q00,meme®°go e�o0 ��®Nil 042 & Offices of The Terracon Companies, Inc. Geotechnical, Environmental and Materials Engineers Arizona ■ Arkansas ■ Colorado ■ Idaho ■ Illinois ■ Iowa ■ Kansas ■ Minnesota Missouri ■ Montana ■ Nebraska ■ Nevada ■ Oklahoma ■ Texas ■ Utah ■ Wyoming QUALITY ENGINEERING SINCE 1965 GEOTECHNICAL ENGINEERING REPORT STUDENT HOUSING WEST ELIZABETH STREET FORT COLLINS, COLORADO PROJECT NO.20965032 March 27, 1996 Prepared for. JPI DEVELOPMENT PARTNERS 600 EAST LAS COLINAS BOULEVARD IRVING, TEXAS 75039 ATTN: MR. PATRICK RHAMEY Prepared by. Terracon Consultants Western, Inc. Empire Division 301 North Howes Street Fort Collins, Colorado 80521 Irerracon GEOTECHNICAL ENGINEERING REPORT STUDENT HOUSING WEST-ELVABETH STREET FORT COLLINS, COLORADO PROJECT NO.20965032 March 27, 1996 Irerracon