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<br />~ ..,......,r- ') <br />'J '.).... . ,) ..... <br /> <br />CHANNEL AND CONTROL.--Streambed consists of large boulders and <br />rocks which are apparently permanent. The stream is in the <br />bottom of a canyon so the banks are steep and rocky. Channel <br />is straight for 500 ft downstream from gage. A deep pool <br />extends about 300 ft upstream from the station with a slight <br />curve to the right. Flow downstream from the station is swift <br />and turbulent. The control, a natural riffle, is located 250 - <br />300 ft downstream at a slight angle across the stream from left <br />to right. Some moss growth is experienced due to upstream <br />reservoir. . <br /> <br />DISCHARGE MEASUREMENTS.--Sta~es below 2.0 ft can be waded in <br />vicinity of cableway. Med1um and hi~h stages measured from <br />cableway 300 ft downstream from stat10n. Cross-section at <br />cable is very rocky but flow is fairly uniform. Measurements <br />should be good if care is taken to keep subsections within <br />percentage. <br /> <br />CABLEWAY DATA.--3j4-inch galvanized cable; clear span, 188 ft; <br />total length, 225 ft: unloaded sag, 3 ft. Right side A-frame <br />H-beam 8 ft high. No A-frame on left side. Right anchor is a <br />concrete block 4' X 6' X 3'. Left anchor is a pin grouted into <br />rock cliff. Cable marked at 5 ft intervals. Stand-up type car <br />stored on left bank. Main cable replaced September, 1990. <br /> <br />FLOODS.--Maximum discharge observed during period of record, <br />19,000 ft'js June 15, 1921 (gage height, about 15.8 ft, present <br />datum) . <br /> <br />POINT OF ZERO FLOW.--0.54 ft, October 20, 1971. <br /> <br />WINTER FLOW.--Releases from crystal Reservoir keep stream open <br />during winter. <br /> <br />REGULATION AND DIVERSION.--Natural flow of stream effected by <br />transmountain diversion through Gunnison Tunnel for irrigation <br />of about 75,000 acres in the Uncompahgre Valley, Taylor Park <br />Reservoir (capacity 106,200 aC-ft); Blue Mesa Reservoir <br />(capacity, 829,600 aC-ft) Morrow Point Reservoir (capacity, <br />121, 200 ac-ft); Crystal Reservoir (capacity, 25,200 ac-ft); <br />diversions for about 63,000 acres, and return flow from <br />irrigated areas. <br /> <br />ACCURACY.--Records usually good. <br /> <br />PURPOSE AND COOPERATION.--A, station is operated to collect basic <br />surface water records for downstream adjudication of water <br />rights. Colorado State Engineer. <br /> <br />0.0 <br /> 5.2 <br />5.2 <br /> 5.4 <br />10.6 <br /> 4.0 <br />14.6 <br /> <br />ROAD LOG <br /> <br />Bridge over Cedar Creek at east end of <br />Montrose Main Street (U.S. Highway 50) <br /> <br />Turn left on Black Canyon National <br />Monument Road. <br /> <br />Turn right - road is rather steep on <br />entrance into canyon. <br /> <br />Caretaker's house and BOR building - gage. <br />