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/'uud U6hfinb Ina 9'.01 Na�hinpton Avenuf Ruine. N'I i3406 14141 88b,1900 <br />FAX p 1414� BBbI:'_I <br />July 14, 1988 <br />Mr, Carl Gayse <br />Gopher Electric <br />1406 Scoon Rapids55433 <br />Minneapolis, KH <br />HE: Hillview Park - Ice Hockey Pink <br />mounds iew, Minnesota <br />Dear Carl: outdnor hockey <br />we have reviewed the details YOU supplied to us for Lh etc. our <br />recommendations, colun'eots, <br />r`nk and we offer our lighting , area, You indicated they <br />plan indicates a standard size (85 x 20U <br />cns total and <br />use (8) 1500 watt quartz now which is abort 272,000 iu.,� <br />12,000 watts. setback) <br />Four poles wouid be alright, but six poles (70' apart with 20' <br />is the proper I.E.S (illuminating Engineering society) practice because <br />it w'-11 provide much better uniformity, which is also important. <br />Recreational Hockey is normally 10 footcandles, High School is 20 and <br />(.... So on up. <br />-- .°a is not adequate for these mounting <br />The 250 watt metal halide YOU suggcs--- Therefore, we are suggecting <br />heights or these illumination levels. <br />403 watt equipment in rur Cutoff Floodlights Series. per Pole) <br />Report indicates <br />ar eaui( e) (6) PH301 A-2A4 tenons. This provides 5?06 average <br />3' height with a 2.68 max/m+n ratio. This <br />Cutoff Floods. which is a <br />maintained footcandlt at and consumes 3,460 watts <br />provides 432,000 to tal iwr,ens casts. We feel this is a minimum light <br />considerable :eduction in <br />th hockey. <br />level even th,,ugh it is y ment it the area <br />At some point they could convert to ay, watt equip <br />is used for a higher classification of play, <br />have questions, -?bout <br />is included per your request. If You <br />A cost qu <br />ote <br />a ep <br />out/rort please call me. �. <br />Che Y <br />e <br />Dick Granholm 6'8Ig'' <br />ineering Manager <br />Application Eng <br />CC: Sue perfetto <br />Kris Biassing <br />