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<br />Potter Creek near Olathe: <br /> <br /> <br />Mean annual gagc volume: 5,000 ac-ft <br /> <br /> <br />Annual volume regional equation: 6,000 ac-ft <br /> <br /> <br />Hay Press Creek above Pruita Reservoir #3: <br /> <br /> <br />Mean annual gage volume: 575 ac-ft <br /> <br /> <br />Annual volume regional equation: 625 ac-ft <br /> <br />The largcst comparative difference in these gages is Potter Creek at about 17%. This is <br />well within the standard error of the regional equation. However, the gage record for <br />each of these creeks is limited. Therefore, two other creeks with a longer representative <br />period of record were chosen to compare with the regional equations. <br /> <br />Escalante Creek near Delta: Period of record; 1977 -1988 <br />Tabeguache Creek near Nuda: Period of record; 1947 -1952 <br /> <br />Both of these gages are affected by diversions and irrigation. Using data obtained from <br />Colorado River Decision Support Systems (Colorado Water Conservation Board, <br />Department of Water Resources) that reflects diversion volumes, along with local <br />estimates of irrigated acreage and return flows, the annual gage volumes were adjusted <br />for these variations to estimate a natural annual volume. <br /> <br />Escalante Creek near Delta: <br />Mean annual adjusted gage volume: 84,000 ac-ft <br />Annual volume regional equation: 75,000 ac-ft <br />Tabeguache Creek near Nuda: <br />Mean annual adjusted gage volume: 15,000 ac-ft <br />Annual volume regional equation: 13,900 ac-ft <br /> <br />The gage data-regional equation comparison between these two gages coupled with the <br />results from Potter Creek, Hay Creek, and Spring Creek indicates that the regional <br />