WSP10479

• File Number: 8210.766
• Description: Gunnison River General Publications - Correspondence - Reports - Etc
• State: CO
• Basin: Yampa/White
• Water Division: 6
• Date: 11/13/1992
• Author: USGS
• Title: Stream Flow Data 1993 - Gunnison River Below the Gunnison Tunnel - BOR
• Water Supply Pro - Doc Type: Data

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United States Department of the Interior

GEOLOGICAL SURVEY

Revised 11/13/92

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WATER RESOURCES DIVISION
Grand Junction. Colorado

FIELD STATION DESCRIPTION

09128000 Gunnison River below Gunnison Tunnel

LOCATION.--Lat 38'31'45", long 107'38'54", (Grizzly Ridge Quad..
scale. 1:24,000), in NE1/4NW1/4 sec.l0, T.49 N., R.7 W.,
Montrose County, Hydrologic Unit 14020002, on left bank 0.4
miles downstream from east portal of Gunnison Tunnel, 4.7 miles
downstream from Crystal Creek, and 12 miles northeast of
Montrose.

ESTABLISHMENT AND HISTORY.--Established October 1, 1903. Records
for 1904 computed by combining flows for Gunnison River near
Cimarron and Cimarron Creek at Cimarron. April 9, 1905, to
August 10, 1915, staff gage 300 ft upstream from diversion dam
at east portal of Gunnison Tunnel at different datum. August
21, 1915, to January 19, 1943, staff gage 500 ft downstream
from diversion dam at east portal of Gunnison Tunnel at
different datum. January 20, 1943, to September 30, 1956,
water-stage recorder at present site at datum 1.0 ft higher.
Station transferred to USGS from Bureau of Reclamation August
1, 1943.

DRAINAGE AREA.--3,965 mi' from topographic maps.

GAGE.--Digital, strip-chart recorder, and (sutron) platform
operated by Colorado Division of Water Resources, attached to
bubble gage, housed in a 4 ft X 4 ft timber shelter.
Recorder set to outside cantilever gage at shelter; limits of
use, 0.00 to 10.14 ft.
Datum of gage is 6,526.06 ft above National Geodetic
vertical Datum of 1929.
Equipment stored in small house by cableway: B Reel, 50 lb
ColumbUS Weight, 100 lb Columbus Weight, ice bar, cable car
puller.

PERTINENT DATA
Elevation 1ft)

Orifice, top of brass nut
Chain length, 17.0

REFERENCE AND BENCH MARKS.--R. M. No. 1 is top of l-inch post
filled with concrete and set in concrete. Located 7 ft
streamward from shelter; elevation, 15.62 ft.
R. M. No. 2 destroyed.
R. M. No. 3 is top downstream, streamward end of boulder
with "X" chiseled 25.5 ft downstream from gage and 4 ft
streamward, elevatin 15.91.
R. M. No. 4 is chiseled "X" in upstream, shoreward end of
boulder 60 ft downstream and 21 ft streamward from shelter,
elevation 10.53 ft.
Sea level datum. - Determined from USGS B.M. standard
aluminum cap on left bank 120 ft east and south of tummel
portal.

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