Record Details
page 3-75
Digital Collections at BYU
| Field | Value |
|---|---|
| Title | page 3-75 Diamond Fork System Final Supplement to the Final Environmental Impact Statement, page 3-75 |
| Coverage | Electronic reproduction; |
| Format | 3-75 text/PDF |
| Rights | Brigham Young University; http://lib.byu.edu/about/copyright/generic.php Public Domain Public |
| Language | English; eng; en |
| Relation | Central Utah Project; Western Waters Digital Library; aquatic resources 3652.2 36522 36522 36523 fish species composition fish sampling in the mid 1970s found the first 0.2 02 02 ot mile of diamond fork creek above three forks to have 92 pounds of brown cutthroat and rainbow trout per acre USBR USER 1990 based on current information on streamflow stream flow and in stream habitat characteristics a binns habitat quality index HQI predicts a trout standing crop of 108 pounds per acre for the 2.27 227 miles of diamond fork creek above three forks although the short section below the sulphur spring has an aquatic invertebrate population heavily dominated by filter feeding black fly larvae simuliidae a fan family dit tolerant of organic enrichment most of the creek has a healthy and diverse population of low tolerance taxa of stoneflies stone flies mayflies may flies and caddis flies native non trout fish species also reside in this reach of diamond fork creek although current population levels are generally unknown these include redside bedside shiner mottled sculpin leatherside chub speckled dace longnose lon gnose dace and mountain sucker ellsworth and kelleher 1998 365.3 3653 3653 diamond fork creek from three forks to red hollow 3653.1 36531 36531 physicalchemical Physic alChemical characteristics and In stream habitat this 254 mile stretch of diamond fork creek receives irrigation flows from strawberry reservoir via sixth water creek from late april through september the average monthly baseline flows for this reach range from 12 to 18 cfs cs in late fall and winter and average 128 to 295 cfs cs from may through september historical water temperatures june through september for this reach average 54f with a maximum average of 55f 55 F CUWCD 1999f the stream gradient is moderate and fiffles riffles and rapids dominate along with substrates of small to medium boulders and cobble the stream channel lies in a relatively narrow canyon and is typically 20 to 30 feet wide 3653.2 36532 36532 fish species composition while this reach has not been sampled since the 1990 release of strawberry reservoirs rotenone treated water the utah division of wildlife resources electroshocked electro shocked diamond fork creek approximately 1.5 15 15 miles downstream of this reach at red hollow in fall 1997 the trout population there was estimated at 73 pounds per acre mostly brown trout with fewer cutthroat and rainbow trout wiley and thompson 1997b trout biomass in sixth water creek just above three forks was estimated at 72 pounds per acre in 1994 utah division of wildlife resources 19940 therefore 72 pounds per acre is a reasonable estimate of trout biomass in this reach between three forks and the proposed diamond fork creek outlet native non trout fish species also reside in this reach of diamond fork creek although current population levels are generally unknown native species include redside bedside shiner mottled sculpin leatherside chub speckled dace longnose lonpose lonjose lon ion gnose dace and mountain sucker ellsworth and kelleher 1998 365.4 3654 3654 diamond fork creek from red hollow to spanish fork river 3654.1 36541 36541 physicalchemical physicalchernical Physic alChemical characteristics and instrearn stream In habitat this 72 mile reach has three distinct geomorphic segments segment 1 extends 1.3 13 miles downstream to just above the diamond campground this entrenched single channel has low sinuosity and a relatively gentle gradient of 1.3 13 percent segment 2 which continues another 2.2 22 22 miles downstream to brimhall canyon has a moderately entrenched single channel with low sinuosity and a gradient of 0.85 085 085 percent segment 3 from brimhall canyon 3.7 37 37 miles downstream to spanish fork river has a gradient similar to segment 2 085 0.85 085 percent but is dominated by multiple channels with repeated and widespread lateral movement massive erosion of streambanks stream banks and instream stream in scouring associated with high irrigation flows up to 460 cfs cs have created a wide unstable braided stream channel after the irrigation season streamflows stream flows drop to a base level of 12 to 18 cfs cs through late fall and winter see table 31 3 1 in chapter 3 section 32.5 325 325 because most of the water in diamond fork creek during the irrigation season consists of water from strawberry reservoir irrigation releases have a large effect on water quality below three forks average water temperature for this reach is 54f 540f with a maximum average of 55 55f OF see table 37 3 7 in chapter 3 section 335 3351 335.1 33.5 3351 335 1 375 3 75 diamondfork diamondwork Diamond Fork system FSFEIS FS FEIS |
| Identifier | http://cdm15999.contentdm.oclc.org/cdm/ref/collection/WesternWatersProject/id/10345 |
