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teen feet in height and 250 in length ; 

 resulting reservoir capacity, 1,840,- 

 000,000 cubic feet, corresponding to 

 236.62 cubic feet per second for ninety 

 days; surplus supply, 184,615,360 cubic 

 feet, to be retained in Bear Creek Res- 

 ervoir ; cost of construction, $7,615; 

 calculation of results in this and all 

 cases based on an average annual rain- 

 fall of thirty inches, with the impound- 

 ing of one-quarter of the precipitation. 

 680 



It is well here to observe that the low- 

 water period during the open season is 

 calculated to average "ninety days." 



Second site, on Bear Creek, ten miles 

 below the outlet of Flambeau Lakes ; 

 dam, fifteen feet in height and 2,500 

 feet in length ; reservoir capacity, 

 5,401,567,152 cubic feet; cost, $47,000. 

 The supply from these two reservoirs 

 will insure 552.81 cubic feet per second 

 for a period of ninety days. 



