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I IN 3IN I" 1z .r `' r+.IN Ile, IN I el feel, e IN I le IN 3 ,fir I INIle=• -1"1X Ile IN § ,y , t Nee IN, �S, .� ,* _ , , ,.7 - o- . , �,v ,.�, r _�a IN I Oslo Road Improvement Project Page 1 File No. 11 -5420 1 . 0 INTRODUCTION 1 . 1 Site Location It is our understanding that the project limits consist of the 1 . 0t mile right-of-way of Oslo Road , between 58"' Avenue and 43`d Avenue in Indian River County, Florida . More specifically , this phase of the project begins around Station 50+00 and continues in an easterly direction to Station 103+20 . The project limits are located within Sections 21 and 28 , Township 33 South , Range 39 IN East . The approximate project limits are shown superimposed on a reproduction of the 1949 Oslo , Florida , USGS Quadrangle Map ( photorevised 1983) presented as our Figure 1 . 12 Project Considerations Based on information provided to us and on review of records from Indian River County, we understand that the existing roadway consists of a two- lane , undivided section with stormwater run -off typically sheet flowing to adjacent roadside swales and the Indian River Farms Drainage District Lateral Canal 13-7 located on the south side of Oslo Road . Based on our understanding and review of the "Oslo Road Improvements" sheets prepared for the project by the client, the proposed improvements consist of the reconstruction and widening of the existing two- lane roadway to a four- lane , divided urban corridor. We further understand that six Ile e dry detention ponds are planned for the corridor . The proposed improvements to Oslo Road also include intersection signalizations along the alignment, including the intersections with 58"' Avenue and 431 Avenue . Construction of up to four new mast arm signal poles , founded on drilled shaft foundations , are planned for each of these intersections . We note that additional subsurface explorations will be performed relative to the new IN mast arm signal poles once the locations have been finalized . Geotechnical engineering evaluations relative to the new mast arm signal poles will be presented to the client under separate cover upon completion of our studies . 1 . 3 Purpose and Scope of Project The purposes of this project were to explore shallow subsurface conditions within the roadway improvement areas and to provide a geotechnical engineering evaluation of the conditions encountered. We accomplished these purposes by: 1 . Obtaining and evaluating readily available geologic and soil survey data . 2 . Conducting auger borings and field permeability tests at selected locations within the roadway improvement and dry detention pond areas and measuring groundwater levels where encountered . IN 3 . Observing recovered soil samples in our laboratory and performing tests on selected samples to aid in classification . 4 . Analyzing and interpreting the field and laboratory data . I 5 . Performing engineering analyses to develop recommendations for site preparation and roadway construction . v lIN' 777 vN'Il sem}rN ,77 `�1 41 , } c „ *. za �- 3 sIN N% Ik NI "ej IN E vaN. 3 '"""Y' $ _ . ' "a 3 ` ` Sf "I"ereY �^£ i ``,}b '" "IN Iler tIN 2; 4 "o ,} R." : Ne h. 4l., i , � .., `' . . . n.,4 .h 4%tk„o- '.A i"J fi. �. �` N, . .< ., , _ . '.ry s ' . . .�} w .. ., , x �, .'�, _ �� - �, r , . . . E g. NerNNI