STUDY AREA 



Three stream drainages were sampled 

 within the Wasatch National Forest in north- 

 eastern Utah: Henry's Fork, Main -Fork of 

 the Bear River, and Hayden Fork (fig. 1). 

 These are representative of the headwaters 

 portions of the larger drainages on the north 

 slope of the Uinta Mountains. 



The mountains are composed primarily of 

 quartzites and other sedimentary rocks ind 

 have been heavily glaciated, although no 

 glaciers are now present. Elevations range 

 from about 6,000 to over 13.000 feet. Much 

 of the area is above timberline (11,000 feet), 

 below which the forest is interspersed with 

 numerous alpine meadows. The predominant 



tree cover is lodgepole pine (Pinus contorta) 

 with lesser amounts of Engelmann spruce 

 ( Picea engelmannii) .Douglas-iiriPseudotsuga 

 menziesii). subalpine fir. (Abies lasiocarpa) . 

 and aspen ( Populus tremuloides) . E.Kten.^ive 

 areas of .sagebrush {Artemisia tndentata) are 

 found on the drier sites at the lower elevation.s. 



Hayden Fork and Main Fork of the Bear 

 River drain into the Great Salt Lake. Henry's 

 Fork drains into the Green River — a tribu- 

 tary of the Colorado River — near Manila, 

 I'tah. 



' Hutchison, S. Blair. John H. Wikstrom, Roscoe 

 Buruell Herrington. and Robert E. Benson. Timber 

 management issues on Utah's North Slope. U.S. 

 Forest Serr Res. Pap. INT-2n. 23 pp.. illus.. 196-5 



■^National Forest Boundary 

 State Boundary 



^Drainage Unit Boundary 

 Wilderness Area Boundary 



Figure 1. — Sketch shows location of the three stream drainages measured during this study. 



2 



