344 oJ. W. Powell's Survey of the Rocky Mountain Region. 
and drained from its very western edge toward the east by the 
Fremont, San Rafael, Price and Uinta Rivers. The western 
portion includes broad valleys, abrupt ranges of mountains, and 
one plateau of considerable extent. The principal valleys in 
this part are the San Pete, Juab and Utah, all having a general 
northern and southern trend, an average elevation of about 
5,000 feet, and all are drained by the San Pete River and the 
streams flowing into Utah Lake. The mountain ranges standing 
between the valleys are the Wasatch, rising in its highest peaks 
to 12,000 feet, the Lake Mountains and the Tintic Hills each 
reaching an altitude of nearly 7,500 feet. 
The lofty table land called Gunnison Plateau has an area of 
about 750 square miles, and an average elevation of 8,000 feet. 
It is bounded on three sides by almost vertical walls, and is 
extremely rugged and difficult to traverse. 
There is but little irrigable land in the eastern portion of 
Mr. Renshawe’s district, but the broad valleys of the western 
contain large areas of excellent lands, and the numerous streams 
furnish a good supply of water. 
Mr. Renshawe determined the volume of water in every con- 
siderable stream as well as the extent and localities of the irri- 
gable lands throughout his district. 
On the plateaus and mountain ranges are large quantities of 
excellent timber. “ 
* On the head waters of the Price River and on Huntington 
Creek are extensive beds of coal, and on that portion of the 
Wasatch Range included in Mr. Renshawe’s district are deposits 
of silver and galena. 
. Renshawe extended the secondary triangulation over the 
whole district assigned him, making stations at an average dis- 
tance of about eight miles, and measuring all the angles of 
nearly every triangle in the extension. He also made a con 
nected plane-table map of the whole area, and complemented 
his work with a complete set of orographic sketches. 
etry—The hypsometric work of this season rests on 
a primary base established at the general supply and rendezvous 
camp at Mount Pleasant, and connected by a long series of 
observations with the station of the United States Signal Service 
at Salt Lake City. At the base station observations were made 
with mercurial barometers four times each da: , and for eight 
ercu- 
ri barometers were carried y each field party, and observa- 
tions made to connect every camp with the base station. All 
the geodetic points and topographic stations were connected by 
observations with mercurial barometers either with the camps 
or directly with the base stations or both. All the topographic 
stations were also connected with each other by angulation, and 
\ 
SESE te eee 
