stock raising is the principal local industry. Some lands are dry- 

 farmed or irrigated. Catering to tourists and sportsmen is an important 

 business in the area, and several resorts and dude ranches are located in 

 the vicinity of the study area. In 1951, there were at least seven dude 

 ranchers \¥ho either provided accommodations for guests or packing facili- 

 ties, or both, Tito of these ranchers vrere located on the main river; one 

 ranch (K-L) was just outside the Wilderness Area at the confluence of the 

 llorth and South Forks. Others vrere at Ear Mountain and Bench Mark near the 

 headwaters of the North and South Forks (see map). 



Precipitation amounted to 2,95 inches at Aijgusta and 2,59 inches at 

 Gibson Dam for the period of study, ilay tlirough September, At the junction 

 of the IJorth and South Forks some rain or snow fell on about 30 percent of 

 the days of this period and about three -fourths of the days were cloudy. 

 Weather conditions v;ere more favorable at the lower elevations. The pre- 

 vailing v/inds vrere westerly and often reached gale strength, especially in 

 the canyon area, 



Vfeter temperatures recorded during the study ranged from 34° F, to 

 58 F, During the early part of the season temperatures below Diversion 

 Dam were , slightly higher than those above Gibson Reservoir, but thi'oughout 

 most of the remainder of the season temperatures taken immediately beloiv 

 Diversion Dam and at the jimction of the tvTO upper forks were not materi- 

 ally different. Daily temperatiire recordings were not made in the lovrer 

 reaches of the North Fork Sun River, but readings taken at occasional in- 

 tervals indicate that the average water temperature in that area -was a few 

 degrees higher than in the upper reaches. The maximum recorded difference 

 in temperatures betiireen the upper and lower reaches was 8° F, Except in 

 the shallow Split Rock Lakes, water temperatures of the reservoirs v;ere 

 sirailar to those of the streams. 



The water in Gibson, Diversion, and Pishlcun Reservoirs is in the 

 medium-hard group (73 to 191 p,p,m, CaCOg), As might be expected, the 

 Y/aters of Gibson Reservoir were slightly softer than those of the lower 

 two reservoirs; othenvisc, there was little apparent difference in the 

 chemical nature of the waters of the tliree impoundjacnts, 



! 



Rainbov; and cuttliroat trout were taken in all waters included in the 

 study except the Split Rock Lakes; brook trout v/ere taken in all areas 

 except Pislikun Reservoir and Split Rock Lakes, Grayling vrere recorded from 

 Pishkun Reservoir and the river belo^'r Diversion Dam; single specimens were 

 reported from Gibson Reservoir, the Iliddle River, and Pishkun Canal i' , 



x> 



1/ Although single specincaG of grajrling v/ere reported from Gibson 

 eservoir, the Iliddle River, and Pishkun Canal, there is some doubt about 

 this species occurring in these areas. All these areas arc above Di-i^ersion 

 Dam, and there is no record of any grayling plants above this pointo If 

 the species were native to those areas, it would seem that several specimens 

 vrould have been checked in creels. 



