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warded to Subterranean Engineering, Inc. to review <br /> the outer anchor design to determine if soils are <br /> adequate. Modifications may be required. <br /> Comments <br /> The 700 ' Rohn 80 guyed tower located at ..Arden Hills , MN does <br /> meet the specifications. of TIA/EIA-222-F considering 80 mph <br /> wind and no ice providing all information as supplied to EEI <br /> being correct and current, feedlines are bundled and evenly <br /> distributed as shown on our attached drawing 27366A1-1 and <br /> foundations are determined to be adequate by Subterranean <br /> Engineering, Inc. for the increased reactions. If tower <br /> loading is changed or altered in any way, we suggest an <br /> additional analysis be completed. <br /> We d4 gecommend that the tower owner excavate adjacent tQ <br /> the existing anchor shafts to inspect for excessive rust• <br /> please note the shafts should bg inspected all the wav tQ <br /> theop ant when It enters the .concrete. Caution = not <br /> d1g_turh t ehs aft with mechanical equipment such M $ back <br /> hoe. We would like t4 reiterate the importance that. the <br /> shafts ghould be t e. first item _f concern before anv Qf the <br /> modifications are completed ger the proposed antennas can be <br /> jngtalled. <br /> There are some criteria we feel you should be aware of when <br /> reviewing our analysis and report. Due to the tubular <br /> construction of this tower, it is difficult to tell the <br /> amount of rust or deterioration that may have developed in <br /> the tower members . <br /> The tubular tower members can be ultrasonically ' tested to <br /> determine the area of steel remaining. However to be abso- <br /> lutely sure that no rusting is taking place, each tower leg <br /> would have to be tested every square inch, which is not <br /> economically feasible. <br /> We are not implying that you do have rusting problems in the <br /> subject tower, we are simply stating that we cannot guaran- <br /> tee that no rusting is taking place and you should be aware <br /> of this. Our stress ratios as shown in our analysis and in <br /> the results section of this report are based on steel being <br /> in new condition with no rusting or deterioration. <br /> Upon request Ehresmann Engineering Inc. will visit the <br /> previously described tower site and inspect -tower, lines, <br /> and antennas for. compliance to this engineering analysis in <br /> its entirety upon completion of project . Cost will be <br /> quoted at time of request. <br /> 5 <br />