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July 1993 -18- 923-2515 • <br />manganese, nickel, and zinc:. The values for arsenic, cadmium, copper, lead, molybdenum, and <br />zinc aze well below the material damage suspect levels. <br />Ground water depth data a~~ from four monitoring sites in upper Grassy Creek west of Windy <br />Point Road, YGAL15, YGAL16, YGAL17, YGAL18 (Figure 2) are reported in tables 5.13-5.16 <br />respectively for the period of September 5, 1990 through July 31, 1992 and August 10, 1992 <br />for station YGAL15. During the monitoring period the depth to water at station YGAL15 <br />ranged from 0.38 feet on April 9, 1991 to 2.36 feet on September 5, 1990. For station <br />YGAL16 the water varied from 9.11 to 13.78 feet below the surface. At station YGAL17 the <br />depth to water vaned rom 2.94 to 6.88 feet below the surfaces. The depth to ground water was <br />greatest at station YGAL18, ranging from 17.78 to 21.28 feet. <br />5.1.2 Water Rights. Irrisation Ditches and Diversion Ponds • <br />There aze no existing water rights for agricultural irrigation, or irrigation ditches along Grassy <br />Creek (Table 5.17). At one time there were plans to develop a ditch (Cook Ditch) and a <br />reservoir (Grassy Creek) in Grassy Creek. However, the ditch and reservoir were never <br />constructed and the water right is inactive. <br />5.1.3 Existing Flood Irrigation Areas <br />There are no existing flood irrigation areas along Grassy Creek. <br />5.1.4 Subirrigated Areas <br />There are subirrigated areas along Grassy Creek, but all are associated with the wetlands (Figure <br />2) • <br />Golder Associates <br />