WRIA 30 - Klickitat County Home

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Klickitat River BasinWatershed Management PlanMill Creek also runs through a canyon in the lower 2.6 miles. Bloodgood Creek has an averagegradient of 2.2 percent. At river mile 2.2, the creek is ten to twelve feet wide with a sand andgravel substrate and heavy riparian vegetation. Spring Creek has a number of cascades betweenriver mile 0.1 and 0.2 and has an average gradient of 1.1 percent. The substrate at river mile 0.7is gravel and mud. Thick riparian vegetation is present at that site.Lower Klickitat Subbasin: Limited habitat data is available for the Lower Klickitat Subbasin.Lyle Falls, located at river mile 2.2, creates difficult passage for salmon and steelhead stocksentering the Klickitat River. The road SR 142 and an abandoned rail line parallel the river alongmuch of the mainstem Klickitat. In the Snyder Creek watershed, a tributary to the KlickitatRiver within the subbasin, an old lumber mill site has a 2400-foot concrete sluiceway that formsa depth and/or velocity barrier to all anadromous species. A major passage restoration projectwas completed in 2004 and is expected to enable fish passage past the old mill site.Swale Creek Subbasin: Swale Creek flows through the one of the driest portions of thewatershed. During summer, there is no stream flow upstream of Warwick. Habitat upstream ofWarwick is limited to a few pools. Although hatchery fish were released upstream of Warwickdecades ago, no fish have been documented in this section of the subbasin in recent years.Downstream of Warwick, flow is also negligible. The first five miles downstream of Warwickare virtually dry. Scattered pools are present that are sustained by small seeps. Fartherdownstream, the bed passes through a deep canyon. Flows in the canyon increase to anestimated 0.25 to 0.50 cfs (fed by a small spring) and summer stream temperatures exceed 23 o Cannually (73.4 o F). Summer habitat in most of the canyon consists of a series of isolated pools(Figure 7). The only continuously wetted portion of the creek lies within the lowest three milesof the subbasin. Stream flow here is negligible and temperatures are high. The mouth of thecreek is isolated from the mainstem Klickitat River by alluvial deposits, prohibiting themovement of fish out of the subbasin in summer. A railroad bed, which was constructed in1902, confines the channel primarily in the four miles downstream of Warwick where the streamis virtually dry during summer and fall.Columbia River Tributaries Subbasin: No information on the Columbia tributaries wasavailable in the reviewed documents. Generally, the tributaries tend to be steep streams. Mostare dry or have little flow in the summer. They are unlikely to contain significant fish habitat.No assessment was completed as part of this watershed planning effort for the Columbia Riveritself or its adjacent riparian habitats.Existing Conditions 30 May 3, 2005
Klickitat River BasinWatershed Management Plan3.0 OVERVIEW OF IDENTIFIED DATA GAPSSeveral data gaps were identified during the watershed assessment and planning processes.These gaps limit the understanding of water resources in WRIA 30. The WatershedManagement Plan identifies approaches to address issues identified in the basin. Theseapproaches include the filling of important data gaps. Once the data gaps are filled, informationgained may suggest modifications to the Watershed Management Plan (see Section 8.0).An overview of the data gaps that have been identified are discussed briefly below. Detailedinformation regarding the data gaps is provided in Sections 5.0 through 7.0.3.1 WATER QUANTITYData gaps related to water quantity issues are listed in this section. Note that several of thesedata gaps also affect the understanding of water quality and fish habitat issues.qqqEstimates of Actual Water Use and Water Budgets are uncertain. Additionalinformation is needed to improve those estimates: Uncertainty remains regardingactual water use in the WRIA. Estimates of stream flow in some cases are poor or out ofdate. Uncertainty also remains regarding the size of aquifers, ground water-surface waterinteractions, and interactions between ground water aquifers.Estimates of Current and Historical Little Klickitat Stream Flows are out of date orunavailable: As was mentioned above, current estimates of stream flow need to beupdated. Additionally, questions have arisen regarding the magnitude of historical flowsin the Little Klickitat and the effects of land use on those flows. Hence, studies havebeen recommended to close those information gaps.Snow level information and relationships between snow levels and subsequentsummer water availability are not available in sufficient detail to support efforts toforecast drought conditions : The Simcoe Mountains are the primary water sources forthe eastern portion of the basin. Local droughts can occur in the basin due to low snowpacks in those mountains. Additional information regarding snow levels and a method topredict pending drought situations is needed.3.2 WATER QUALITYData gaps related to water quality issues are listed in this section. Note that several of these datagaps also affect the understanding of fish habitat issues.qqNatural background temperature in the Little Klickitat River: Questions have arisenregarding the levels of shade that can be achieved along the Little Klickitat River and,consequently, the stream temperatures that can be attained.Sediment Inputs: Limited data is available regarding sediment concentrations instreams and the sources of sediment inputs. A study estimating the sediment inputsIdentified Data Gaps 31 May 3, 2005
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