Table 7.2. Effect of Change in River Classification in Central and Southern Areas of 

 Ashuelot River Basin from C Class to B Class on Variable Costs, High- and 

 Median-River Flow, Based on Optimizing Net Benefits, Month of August. 



River classiHcation 



High flow Median flow 



Public and private variable cost 

 B class 

 C class 

 Difference 



Dollars 



260,540 295,836 



234,745 246,959 



25,795 48,877 



Difference as a percent of C class 



Percentage 

 11 20 



Maximized net benefits = REVOWAT 



For minimizing cost of providing water supply and waste-water treatment 

 (SOCCOST), the actual level of variable cost of treatment is less than the above, 

 and the increase in cost of moving from class C to class B is about the same (see 

 Table 7.3). The percentage increase is substantially higher, 29 percent for high 

 river-flow level and 3 1 percent for median-flow level. 



Table 7.3. Effect of Change in River Classification in Central and Southern Areas of 

 Ashuelot River Basin from C Class to B Class on Public and Private Variable 

 Costs, High- and Median-River Flow, Based on Minimizing Public and Private 

 Cost, Month of August 



River classiHcation 



High flow High flow Median flow 



Public and private variable costs 

 B class 

 C class 

 Difference 



Dollars 



115,553 123,654 



89,857 94,577 



25,696 29,077 



Difference as a percent of C class 



Percentage 

 29 31 



Public and private costs = SOCCOST 



51 



