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TKDA <br /> <br />mandatory for all persons to gain access to BNSF property. <br /> Deliverables <br /> <br /> 1"=50' scale mapping, with 1' contours, in Microstation <br /> format <br /> <br />Digital map database in Microstation/Geopak format <br />Preliminary easement descriptions and ROW exhibits <br /> <br /> TASK 5: GEOTECHNICAL <br /> The subsurface geotechnical exploration necessary for development <br /> of the preliminary engineering will be essentially limited to those <br /> items that require construction outside of the existing track <br /> alignment. Namely siding and mainline track construction in areas <br /> where current trackage does not exist. The proposed construction <br /> of a triple track between Interstate and Coon Creek, sidings at both <br /> Anoka and Coon Creek, and the double track extension through <br /> Northtown Yard are the only improvements that meet this criteria. <br /> Because the loading of the track subgrade is relatively dissipated at <br /> a depth of 4 to 6 feet deep, our experience has shown that a series of <br /> frequent, shallow hand auger borings along with an occasional 20 <br /> or 30 foot deep truck mounted penetration boring is the most <br /> effective program for designing a proper track embankment. <br /> <br />The double track from Becker to Big Lake, double track extensions <br />through Minneapolis Junction to St. Anthony, crossover <br />installations, and the various track upgrade type improvements are <br />basically track replacements on embankments that were once or are <br />still active. Our experience has shown that very little geotechnical <br />work is necessary in these situations as the track beds have already <br />experienced substantial consolidation from previous rail <br />operations. Occasional hand auger borings in these areas may be <br />warranted to verify that the .underly~.g material is suitable for the <br />intended construction. <br /> <br />The cost for flagging protection during the geotechnical exploration <br />program has been included as part of this Proposal. <br /> <br /> Deliverables <br /> <br /> Geotechnical recommendation reports for track and signal <br /> foundations <br /> <br />TASK 6: TRACK AND CROSSING DESIGN <br />Preliminary plans will be developed for all of the proposed track <br />capacity improvements. Track plan and profile sheets detailing <br /> <br /> Preliminary Engineering Proposal <br />TOLTZ, KING, DUVALL, ANDERSON & ASSOCIATES, INC. <br /> <br />53 <br /> <br /> <br />