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iOiaMMpi/ <br />al until after <br />en between <br />actory for the <br />at the Planning <br />the Planning <br />a for Planning <br />a qualified <br />e necessary <br />leins resulting <br />cs. <br />cation filed <br />as the o^ner <br />safety inspcc <br />with the <br />le new application. <br />oper site plans* <br />port. <br />I <br />■' .-"'V <br />ly <br />EngiriGGring phone: (612)471-7010 <br />P. O. BOX 318. 4312 SHORELINE DRIVE. SPRING PARK. MINN. 55384 <br />February 22, 1977 <br />Mr. John F, Bonner III <br />1500 Da in Tower <br />527 Marquette Avenue <br />Minneapolis* Minnesota 55402 <br />^ '"Vf p 'V' Iir nWi! :•! 1 'J* I <br />! ' ■■k 9 I <br />■ t • <br />I ‘ ’ i >«• r I 19 M <br />ViU-AGii iii OS<0^':O <br />Dear Mr. Bonner: <br />Upon the request of Mr. Lee Primus I inspected the Ski-Tonka ski <br />area, which is located in Orono, Minnesota, to determine if the <br />equipment met safety requirements. On February 1, 1977 you fur­ <br />nished me with five pages of ANSI Regulations that the City of <br />Orono had furnished you. The standard is American National Standard <br />Safety Requirements for Aerial Passenger Tramways B77.1-1973. A <br />copy of the five pages are attached to this report. <br />On February 3, 1977, I inspected and tested the tow equipment to <br />determine if the equipment met the safety requirement*- of the ANSI <br />standards. All tows were tested with the exception of #10 which was <br />inoperable. On February 11, 1977, I met with Al Olson, Orono City <br />Inspector, at Ski-Tonka to jointly inspect the area and to demon­ <br />strate to him how the tows were inspected. <br />At the time of my inspection it was noted that the ski tows were <br />not equipped with backstop brakes as required in para. 2.2.5.4.1. <br />The purpose of these brakes is to prevent the ski ropes from being <br />pulled backwards if the ski tow should stop for some reason. The <br />ski tow rope was physically pulled backwards to determine the amount <br />of force required to reverse the direction of travel of the rope. <br />In my opinion the tow rope would not, notwithstanding the absence <br />of brakes, reverse direction appreciably. Any such reversal would <br />likely only result in a slow reverse movement. So long as this is <br />the case, the reverse movement would not present a great hazard to <br />a skier using the tow. <br />Para. 2.2.5.4.2 of the ANSI standards requires that: <br />"Unless an unloaded tow operating at maximum speed will <br />stop in 25 feet or less an automatic brake shall be <br />provided to assure this stopping distance." <br />J I <br />Mr. Jc <br />All tc <br />had a <br />an aul <br />The tc <br />ments <br />safety <br />(saf el <br />tion < <br />to st< <br />this ] <br />Warnir <br />the rc <br />the si <br />(they <br />form V <br />OTHER <br />AlthoL <br />area h <br />and ur <br />and ad <br />a good <br />quate <br />repair <br />In con <br />the Sk <br />inspec <br />tions: <br />ooerat <br />NOTE :