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Klickitat River BasinWatershed Management Plan5.1 CURRENT AND FUTURE WATER DEMAND IN WRIA 30Problem: There is a strong need to develop a system that will facilitate the approval of newwater rights and/or ensure that current and future water needs can be met. It hasnot been possible to obtain new water rights within WRIA 30 in recent decades.The KPUD has an immediate need for additional water to meet demands of itscustomers. The KPUD and other water purveyors are likely to need additionalwater in the future as the population in the WRIA grows. Additionally,applications for new water rights to support irrigation uses have been difficult orimpossible to obtain. The economy of the WRIA is heavily dependent uponagricultural land uses. Hence, the availability of water for agricultural uses canhave a large effect on the economic viability of the region.Goal:The goal for management is to ensure adequate water supply to meet the currentand future needs of the citizens of WRIA 30Priority: High5.1.1 BACKGROUND5.1.1.1 Current Rights, Claims, and ApplicationsBased on the information contained in Ecology’s Water Rights Tracking System (WRTS),59,585 acre-feet/year of water is allocated by 881 water right certificates and permits (Table 9) inWRIA 30. Of this total quantity, the vast majority (77 percent) of water allocated within thewatershed is for irrigation use. Water rights allocated for municipal, domestic,commercial/industrial, heat exchange, and railway uses collectively make up an additional 22percent of the total. Water rights allocated for stock watering, fire protection, fish propagation,and wildlife propagation collectively make up less than one percent of the total. The majority ofthe water right certificates and permits are located in the Little Klickitat, Swale Creek, andColumbia Tributaries Subbasins. A large portion of the water rights certificates and permits inthe Columbia Tributaries Subbasin are rights for Columbia River diversions.According to the WRTS, there are 1,178 claims in WRIA 30 for 91,062 acre-feet of water peryear (Table 10). The majority of water claimed is for irrigation use (99.6 percent). The WRTSdatabase includes 92 water right applications for new appropriations (ground water and surfacewater) pending in WRIA 30. The cumulative rate of diversion/withdrawal encompassed by theseapplications is approximately 1,170 acre-feet per year. The largest number of applications (64percent) is for irrigation use. Annual quantities are determined during the permitting process andthus not recorded for applications in WRTS.5.1.1.2 Current Water UseSufficient information was not available to develop water budgets for the Swale Creek andColumbia River Tributaries Subbasins. Most of the creeks in these subbasins are dry or near dryin summer; hence, no surface water is available for additional allocation in summer months.However, ground water in the underlying basalt aquifers represents a significant source of waterWater Quantity Management 38 May 3, 2005
Klickitat River BasinWatershed Management Plansupply within the limits of annual recharge quantities. Ground water development in the SwaleCreek Valley for irrigation showed a marked increase in the 1960s and early 1970s (Mix, 1976).Based on available information, it appears that the area of irrigated acres in the valley and theaverage annual ground water pumpage have declined somewhat since the 1970s. Despite theapparent decline in ground water use for irrigation in the valley, obtaining a new water right isvery difficult. Transfers of existing irrigation water rights have occurred in recent years, butthere is a growing concern that a significant portion of the historical agricultural water rightappropriation has inadvertently been relinquished and is no longer available.Table 9. Number of certificates and permits, claims, and applications for WRIA 30 and theacre-feet per year certificated, permitted, claimed, or applied for.Ground waterCertificates andPermitsSurface WaterCertificates andPermitsClaimsApplicationsNumber ac-ft/yr Number ac-ft/yr Number ac-ft/yr NumberUpper Klickitat 0 0 10 10 28 43300 0Middle Klickitat 6 487 188 699 278 44590 5Little Klickitat 181 18910 259 15136 182 1536 31Swale Creek 58 11632 7 27 273 15 22Lower Klickitat 15 217 67 3002 240 13 16Columbia Tributaries 61 7997 29 1468 177 1608 18Total 321 39243 560 20342 1178 91062 92Table 10. Estimated Total Water Use for WRIA 30 by SubbasinEstimated Water Use (Acre -Feet/Year) by CategoryPWS- Self-Supplied Supplied PWS Non-Irrigation Residential Residential ResidentialSubbasintotalsSubbasinMiddle Klickitat 13,895 154 13 10 14,072Little Klickitat 9,788 750 477 400 11,415Swale Creek 5,729 3 19 0.1 5,751Lower Klickitat 0 111 307 26 444Columbia Tributaries 48 358 56 34 496WRIA 30 Totals: 29,459 1,376 871 471 32,177% of Total WRIA 30 Use: 92% 4% 3% 1% 100%5.1.1.3 Current and Future DemandCommercial, Industrial, and Municipal DemandIn 2003 the quantity of water consumed by commercial/industrial uses comprised only onepercent of the total annual volume used in WRIA 30. In 2003, water consumed by residentialuses on public water supply systems comprised only comprised only four percent of the waterused in WRIA 30. The US Census data from 1990 to 2000 suggests a small growth rate inWater Quantity Management 39 May 3, 2005
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