50 EEPOET UNITED STATES GEOLOGICAL SUEVEY. 



key Gap we foimd quite a large stream. It was well timbered with 

 Cottonwood and showed beautiful glacial moraines on either side. Dur- 

 ing the larger portion of the year this stream carries its water northward 

 into the river. ISTear the base of the mountains we find large meadows 

 on the streams, which are generally formed near the conflux of several 

 smaller creeks. Another stream of some size flows northward about 8 

 miles west of Whi skey Gap. During the distances for which these streams 

 remain within the boundary of the hills they carry clear, good water, 

 but they become alkaline after passing through the strata comjjosing the 

 Sweetwater Group. These two latter streams we have named, respect- 

 ively, Glacier and Lone Eodc Creelcs. Through Whiskey Gap flows Muddy 

 Creeli. Eising south of the Seminole HiUs, it flows first westward and 

 then turns shari3ly to the north, finally emptying into the Sweetwater. 

 Within the gap the water of this stream is clear, but it soon becomes 

 muddy after leaving the hills. It is crossed by the wagon-road imme- 

 diately outside of the gap. East of Whiskey Gap we have but one more 

 stream of imi)ortance in our district, Sandy Creeli. It heads along the 

 slope of the Seminole Mountains, flows through a low pass, and enters 

 the l!^orth Platte south of the junction of the Sweetwater with this 

 river. 



WI]NnD EIVEE DRAINAGE. 



Wind Eiver does not reach into our district, approaching it only within 

 about six miles. An unx^ortant portion of its drainage remains within 

 the limits of our district, however. Little Wind River, the most promi- 

 nent branch, heads in the Wind Eiver Eange, north of our area, and 

 flows in a southeasterly direction after leaving the mountains. On it 

 Camp Brown is located. After passing the post its course is a httle 

 south of east, until it makes an abrupt turn northward and joins the 

 Wind Eiver. This in turn flows in a general northerly direction. The 

 name is retained until it passes through the Owl Creek Eange, about 

 north latitude 43° 30', when it changes into that of Bighorn Eiver. 

 All the remaining drainage belonging to this system, so far as contained 

 withui our district, consists of tributaries to the Little Wind Eiver. Two 

 streams are prominent among thean — the Popo-Agie and Beaver Creelc. 

 The former rises in the Wind Eiver Eange, near Snow Peak. As long 

 as it remains in the mountains it is known by the name of Worth Forlc. 

 Flowing in a northeasterly direction, it x)asses through densely-timbered, 

 very rocky canons. Steep slopes inclose the streams and carry to it swift 

 mountain streams. Cutting through the foot-hills, it finds egress by 

 way of a comparatively wide opening through the outlying hills of the 

 third chain. Emerging entirely from the hills, it flows through a broad, 

 fertile valley, and finally enters the Little Wind Eiver as Popo-Agie a 

 little south of east from Camp Brown. A stream that in reahty is a 

 tributary of the North Fork has been called the Big Popo-Agie and Bald- 

 will's Creelc. It takes its rise in the range south of that of the North 

 Fork, and, following an approximately-parallel course, finally leaves the 

 mountains. ^Vhile in the lower country, near the eastern edge of the 

 outlying hills, it is joihe<J by a creek coming from a southwesterly direc- 

 tion. Near the confluence of these two streams extensive settlements 

 exist. After the junction of the three creeks, below that of the North 

 Fork and Baldwin's Creek, the stream is called simply the Popo-Agie. 

 Its largest tributary coming jfrom the mountains is the Little Popo-Agie. 

 Heading near Stambaugh Peak, this stream flows in a northeasterly 

 direction. After leaving the foothills it cuts through the third chain, 

 fincUng its way along a very fine canon. Perj)endiciilar waUs, about 800 



