WRIA 31 Instream Habitat Assessment

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45Average Stream Flow (cfs)40353025201510Alder Creek USGS Gage14034350 1962-198250Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep400Average Stream Flow (cfs)350300250200150100Rock Cr USGS Gage 140366001962-1968Rock Creek Washington DeptEcology Gage 2007/8500Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug SepFigure 2. Monthly Exceedance flows for Rock Creek and Alder Creek (USGS gage stations:http://waterdata.usgs.gov/nwis/current; Ecology gage:https://fortress.wa.gov/ecy/wrx/wrx/flows/station.asp?sta=31B070).WRIA 31 Instream Habitat Assessment 5 Watershed Professionals Network
Figure 3. Daily maximum water temperature at four stations in Rock Creek based on 1999 to 2004data (Aspect 2005). (RC-09 is located near the mouth of Rock Creek, RC-8 is located justdownstream of the confluence with Squaw Creek, RC-7 is located in Squaw Creek near theconfluence with the mainstem Rock Creek, and RC-6 is located upstream in the basin near theconfluence with Badger Gulch.)3.0 METHODS3.1 STUDY AREAThe study area is located in Water Resources Inventory Area (WRIA) 31, which coversportions of Klickitat County, Yakima County, and Benton Counties, Washington (Figure4). The study area does not include the Columbia River. The City of Kennewick lies onthe eastern edge of the WRIA. Specific study areas included the streams in the RockCreek, Wood Gulch, Chapman Creek, Pine Creek, and Glade Creek subbasins.Within the subbasins, the study included all suspected anadromous waters in Rock Creek,Chapman Creek, Wood Gulch, Pine Creek, and Glade Creek. The WDFW SalmonidStock Inventory (2002; http://wdfw.wa.gov/fish/sasi/) identifies steelhead in Rock Creekand two of its tributaries, (Quartz and Squaw Creeks) (Figure 5). No fish are indicated inthat report in the other Subbasins. The Limiting Factors Analysis indicates that fish arealso found in the lower 0.3 mi of Chapman Creek and near the mouth of Wood Gulch.The Draft Recovery Plan (NMFS 2008) depicts the potential distribution ofOncorhynchus mykiss (steelhead and rainbow trout) far into many of the subbasins. Thestudy area included the full extent of the potential distribution of steelhead identified inthe Draft Recovery Plan.WRIA 31 Instream Habitat Assessment 6 Watershed Professionals Network
Page 1: WRIA 31 InstreamHabitat AssessmentG
Page 5 and 6: Table of ContentsAbstract..........
Page 7 and 8: List of FiguresFigure 1. Study area
Page 9 and 10: We wish to thank the Nature Conserv
Page 11 and 12: Figure 1. Study areaWRIA 31 Instrea
Page 13: around 24 inches along the western
Page 17 and 18: Figure 4. Major streams in WRIA 31.
Page 19 and 20: Table 1. Data collected in the fiel
Page 21 and 22: Hydromodifications were noted withi
Page 23 and 24: • Existing traffic count data for
Page 25 and 26: Cultivated small grains; and Cultiv
Page 27 and 28: 3.5.6 Road Surface ErosionSEDMODL2
Page 29 and 30: Totalsamplelength(ft)TotalSampleLen
Page 31 and 32: Table 9. Number and type of channel
Page 33 and 34: 60.0%Percent of EachChannel Unit Ty
Page 35 and 36: Table 10. Pool Volume in each reach
Page 37 and 38: Table 12. Spawning area in each rea
Page 39 and 40: Chapman CreekAverage PercentComposi
Page 41 and 42: spawning habitats. Spawning areas a
Page 43 and 44: Chapman Creek30Number2010075%% Embe
Page 45 and 46: Basin Stream Reach CanopyCover (%)W
Page 47 and 48: 4.2 FISH SURVEYS4.2.1 Snorkel Surve
Page 49 and 50: 4.2.2 Spawning SurveysSpawning surv
Page 51 and 52: small depression 0.5 foot deep is p
Page 53 and 54: the heavy rainstorms which occurred
Page 55 and 56: Figure 16. 1992 Landsat land cover
Page 57 and 58: locations, the livestock have free
Page 59 and 60: Figure 18. Stream flow, water tempe
Page 61 and 62: mortality reported at various sedim
Page 63 and 64: some cases, the sparse condition is
Page 65 and 66:
was based on a one-day site visit a
Page 67 and 68:
Aspect Consulting, LLC 2005. Rock C
Page 69 and 70:
Reiser, D.W., and R.G. White. 1988.
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WRIA 31 Instream Habitat Assessment

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