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36 Bovee and Milhous (1978) may be correct in insisting that the cost per cross section decreases drastically for the IFG4 Method as the parenthetical data in Table 19 clearly demonstrates. Nonetheless, the total cost still essentially doubles, triples, and quadruples with the second, third, and fourth visits to the stream. It must also be reiterated that on virtually every field excursion during the summer of 1978, three to five stream study reaches were visited and the travel time from the home office (Montrose) was prorated and apportioned accordingly. Thus, the cost analysis presented in Tables 17, 18, and 19 is realistic for the State of Colorado. Gasoline costs and vehicle maintenance costs were not included in the above portion of the cost evaluation. Approximately 15,000 vehicle miles were expended during the study. At a rate of reim- bursement of ls~/mile, the vehicle maintenance and mileage costs are approximately $2,250. If costs for the actual collection of field data only are added up, the total is $11,850, broken out as $5,400 travel time and field time combined, $4,200 for per diem, and $2,250 for trans- portation expenses. A total of 282 cross sections were evaluated at a total cost of $11,850, or $42 per transect. Data reduction costs have not yet been presented in this report. For comparative purposes, the data in Table 20 is pre- sented below to get an actual cost for the various categories as well as on a percentage basis. Field time, travel time and per diem costs combined made up almost 45% of the total cost of the project. Data formating and analysis costs approximately equal field and travel time. Non- disposable field equipment was all acquired through transfer to this project from other projects within the Colorado DOW and thus incurred no cost to the project. Non-disposable equipment included a surveyors transit, two pygmy type flow meters and two Price type AA flow meters, two flow meter staffs, two sets of earphones, and electroshocking equipment. Disposable field equipment included such items as rebar, hammers, 100 ft steel and fiberglass tapes and the like. A stream by stream summary for the cost of this project for all phases of the study is presented 'in Appendix D.