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Total Susncr,~ed Solics (TSS) <br />Results <br />• TSS sarplcs Here ta}:en appra~icately wee}~1y at stations in the l:orth Fort: and <br />F`irulesota Creek and weedy or as available in SteverLS Glil.ch. <br />Total suspended solids in the 7iorth F'orr, ranged from less than one to 357 <br />mg~l duri7g the P:ay - Gctober, 1973 period. Dar:ng the same period TSS values in <br />the Q.~1ch ranged from less than one to 2150 mg~l. <br />All TSS values above 50 mg~l were fo•;nd during the I~ay, June a.^.d very early <br />July period, corresponding to sno+,nelt and sp.-ing rain runoff. TSS values after <br />early July were mostly low (25 mg~l or less) and Srequently between <1 and 10 mg~l. <br />Liaited data on June 14th and 16th shoca hia~er TSS levels ori~~ratiag in the <br />vicinity c: the r.:ine as cc~pared to the control area. <br />Cor..oarisons <br />• Previous data from 1•;arch and April, 1975 showed TSS ranges of 71 - 1130 mg~l <br />in the Ro"rh Fork a.-id ~2 - 100,000 mg~l in Stevens a.~1ch. TSS values obtained <br />during the present period were within the previous rage but corsiderably lower, <br />especially for Stev ~ens (k:].ch. Periods of high runoff from sno+.~melt accounted for <br />the very him levels fD•,u~d in the spring period. <br />Sitsificaace <br />?;orth For'r. data from 14ay -October do not indicate anv significant increase• <br />in turbidity from the nine area or the coal loadout area, based on the weekly <br />samples. Previous data indicate violations of state and federal standanis could <br />occur Srom the mine site, but the installation of sedimentation days in Y:estmorelanri <br />Ca~von should eliminate the major increases in sedimentation and provide compliance <br />+rith OS~`. regulations, <br />3~7 <br />