travel. Cutthroat, brook, and rainbow trout were taken in almost equal numbers. 



Type and period of coverage: Intensive checks, June 2li to July 7» 195l» 



Period of estimates: Above period only but thought to represent most 

 of the fishing. 



Expenditures for equipment and annual items: See Gibson Reservoir. 



Other expenditure items: Derived separately for this area. 



Madison Reservoir , Montana (18), on the Madison River in the northern 

 Rocky Mountains, was built in 1908 for power production. It is 3,800 acres in 

 size. Aquatic-plant beds are abundant in the upper part of the reservoir. Fluc- 

 tuation has been as great as 8 feet, but normally is not that pronounced. Access 

 is good on two-thirds of the shoreline. 



Most of the fishermen were residents of Montana. Although rainbow and 

 brown trout comprised most of the catch, 11 percent of the take was suckers. 

 Brook and cutthroat trout, Rocky Mountain whitefish, suckers, and grayling also 

 were recorded. 



Type and period of coverage: Intensive checks, May 21 through Septem- 

 ber 30, 1950. Limited checks in fall. 



Period of estimates: General fishing season, May 21 through November 15. 



Expenditures for equipment and annual items: Applied from special sur- 

 vey of Montana fishermen (7). 



Other expenditure items: Single figure derived for this area and the 

 lower section of the Madison River covered in 1950 and applied to both fisheries. 



Hebgen Lake, Montana (18), on the upper portion of the Madison River, 

 was built in 1915 for power production. The maximum depth of this 13,l*00-acre 

 reservoir is 70 feet, and annual drawdown is usually around 10 to 15 feet. Aquatic 



15 



