256 



106 MILE SITE 

 COST ESTIMATE REVISED 



SLUDGE PRODUCTION ; 



Summer = 317,447 cf/day = 2.22 mcf/wk. 



Winter = 236,458 cf/day = 1.66 mcf/wk. 



Average = 276,053 cf/day = 101.2 mcf/yr. 



CAPACITY OF CITY VESSELS ; 



3 vessels = 4 vessels minus 25% downtime 

 Miles per roundtrip = 2x{130+30) = 320 miles 



320 miles/roundtrip 



+ 2 hours loading time = 



12 miles/hr. 

 28.67 hours roundtrip + loading time. 



24 hrs./day x 6 days/week 



= 5 trips/week/vessel 



28.67 hours/trip 

 or 15 trips/week, 780 trips/year 



780 trips/yr. x 84,000 cf/trip = 65.52 mcf/year 



or 1.26 mcf/wk. . -^ . -- 



VOLUME TO BE DISPOSED OF BY PRIVATE BARGE ; 



Summer; 2.22 mcf/wk. - 1.26 mcf/wk. = 0.96 mcf/wk. 



0.96 X 26 wks. = 24.96 mcf 

 Winter; 1.66 mcf/wk. - 1.26 mcf/wk = 0.40 mcf/wk. 



0.40 X 26 wks. = 10.40 mcf 



Summer Shortfall = 24.96 mcf 

 Winter Shortfall = 10.40 mcf 

 Total Shortfall = 35.36 mcf 



COST OF DISPOSAL OF SHORTFALL BY PRIVATE BARGE ; 

 35.36 mcf x $0.35 = 12.38 M 



COST OF FUEL - CITY VESSELS ; 



780 Trips x 320 miles/trip x 10 gallons/mi x $0.90 = $2.25 M 



TOTAL COSTS ; 



Private Barging . $12.38 M 



Marine Personnel (See Question No . 6 ) 3.94 M 



Repairs, Maintenance 



& Supplies 2.40 M 



Fuel 2.25 M 



Additional Storage 2.25 M 



Total Cost at 106 Mile Site $23.22 M 



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