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<br />RONALD C Vie LAUGHLIN <br />KENNETH R WRIGHT <br />HALFORD E ERICKSON <br />DOUGL AS T SOVERN <br />JOHN T McLANE <br />KENNETH ASH. MANAGIR <br /> <br />WRIGHT-McLAUGHLIN Ef"roIGiNEERS <br /> <br />2420 ....LCOTT -STREET <br />DENVER. COLOR/IOU ao:!',! <br />(30)) 41>8.620\ <br /> <br />COM"I_I!:TE ENQINI;Ii:RING SEflVICEII <br />IN THI!: f1PECIAL TV ~IELOS ':11" <br />'W},TEFl 5>UPPLV AND ~'lflTRIBUTlC~, <br />WATER ",,0 SEWAGI! TRroATMI:NT <br />BEWAGl; COLLECTION .0.1'<0 REIJSE <br />II'<DUSTRIJ\l. WASTES <br />!lTORM ORAII'<A<;I! <br />1'1..000 COI'<TROI.. AI'<O <br />()THI[IIt WAT....ORlI:HTI:O "ROJECHI <br /> <br />ENGINEERING CONSULTANTS <br /> <br />^<;F"'I'N OFFICE <br />f' (J flOX 21110 <br />^','-'I'N, eOl-o. R\0!1 <br /> <br />Sep tembe r 6, 1973 <br /> <br />Mr. Frank Rozich <br />Technical Secretary <br />Colorado Water Pollution Control Commission <br />4210 E. 11 th <br />Denver, Colorado 80220 <br /> <br />Dear Frank: <br /> <br />On September 1 and 3, 1973, personn"l fmm our office made CI detai led <br />inspection of lena Gulch in Jefferson County from the uppermost point <br />of the stream on lookout Mountain to Clear" Creek. The purpose of the <br />walking inspection trip was to determine channel characteristics for <br />flood hazards related to a Master Plan which we are preparing for the <br />Urban Drainage and Flood Control District and several municipalities <br />plus Jefferson County. <br /> <br />We noted several instances of apparent serious pollution of this public <br />waterway which we wish to call to your attention. These are briefly <br />1 isted below. <br /> <br />1) lena Gulch, immediately dmmstream of the Maple Grove <br />Reservoi r. On September 3, labor Day, the enti re flow <br />of the stream (approximately 2 cfs) was ink black for at <br />least 4 hours, the pollution e;<tendin<j for" ':he full len<jth <br />of lena Gulch to its confluence witi-. Clear Creek. Inter- <br />views with residents alon<j the Creek indicated that the <br />pollution mi<jht be originating with a water treatment plant <br />situated on 26th Avenue below the dam. One individual <br />indicated that he thought it was probably fi' Iter backwash <br />water; however, he pointed out that similar discharges <br />were infrequently made, and then only on holidays. An- <br />other resident indicated that he thou<jht l.ena Gulch was <br />a ditch jor the purpose of carryin<j off such waste dis- <br />cha rges. <br /> <br />2) Camp George West, in the NE quarter, Section I, Township <br />4 S, Ran<je 70 W. The dischar<je from a 2~' pipe into lena <br />Gulch was white and had an odor characteristic of pesticides, <br />accordin<j to our en<jineer. We call this to your attention <br />because of the downstream water supply reservoir at W. 20th <br />Avenue. The en<jineer in our office noting this particular <br />dischar<je is a sanitary engineer by education. <br />