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<br />, <br /> <br />N tfa.J,........J ~ <br /> <br />CHRONOLOGY OF HAZARD RE-EVALUATION WORK FOR <br />TJlr. NA"IOt-lAT. !lAM ;,AI'r."y I'ROr:RAM It-I RI:I.A'!'lON '1'0 <br />LAWN LAKI:: DAM <br /> <br />September ~7, ~9'l9 <br /> <br />L<lwn Lake DalU wiln f~own by he~icopter /lnel (lata <br />r.athered including on the ground inspection of the <br />dam under ful~ conditions." The hazard rating <br />given at this time was low./ <br /> <br />y'Y, <br />" <br /> <br />August 29, ~980 <br /> <br />Lawn Lake Dam was ref~own by he~icopter/and data <br />obtained, Due to wind conditions, the he~ieopter <br />was unable to ~and on the dam. The photos indicate <br />that the reservoir was near~y empty. The aeria~ <br />report forro, dilted Aup,ust 29, 1980, shows moderate <br />hazard IIlClrke<!..i!rst and then changed 10... hi&l>. <br /> <br />September ~2, 1980 <br /> <br />Al~ reVl.Sl.ons and additions to the Federa~ Inventory <br />of Dams, ine~uding hazard determinations made to <br />date, were transmitted to the Corps of Engineers. <br />Due date for comp~etion was Ceptember 30, 1960. <br /> <br />Jli:pproximately 700 fulzard ratinr.s and field inspection- <br />rcpor\:S x'cullin_ for i'ina~ review- and.acce?tance~ <br />Lawn Lake Dam is included in this group. These data <br />were not transferred to the dam files; waiting final <br />-., review. A preliminary c~n..l "'''pORt-form_showed <br />7" Lawn- Lake Damas ahrgh --hazard. The jacket 01" the <br />nationa1 dam inspection phase I ana1ysis shows Lawn <br />Lake as a potentia~ hig~zard and under review. <br /> <br />Five hundred and nincteen final reviews were completed <br />between September 30, ~960 and Apri~ 30, 1962. One <br />hundred and eighty-one ratings remained. Ninety-one <br />of these are high hazard, forty-nine are moderate, <br />and seven low. Lawn' Lake was among the remaining <br />group of da.lIG. Thirty-four :require additional. fie1d <br />work to determine if the rating should be maintained. <br />Lawn Lake is one of these. <br /> <br />;;.- <br /> <br />September-3Q.. :t.gacr:--- <br /> <br />April 30, ~982 <br /> <br />July 9, 1962 <br /> <br />forty-seven 1U0re repor-ts were checked and final.ized <br />by Ju~y 9, 1982. One hundred thirty-four ratings <br />ati11 need fina~ review. r~wn Lake ia among the <br />relUainine dams needing .1 flna~ review. <br /> <br />. <br /> <br />- <br /> <br />~~."-""'~ <br />