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i. Meteorological Data precipitation data at the Sepaca II-W Miae has bean collected since August 18, 19a9- Preciyitatioa data is collected £zom a Beltoxt Weighing Bueket Rain Gage situated adj agent to site SW-S2W-FG1. Data for tAis year may be found is Table 1 (Appendix A1. To provide a Danis for comparison of past years precipitation data, data from 5CC's adj aceac Seneca II Miae has base included in Table 2 (Appendix A1. She Seneca ii Mine precipitation station is located approximately seven miles northeast of the center of the Seneca II-W Mina. Climatic conditions era similar betxeea the txo mines. Temperature, xi.ad apaad, sad direction data from the senate 1I-W Mine are yresanted 1n Appendix H- ~ pats from the National Climatic Data Ceatax fox the 8aydea station was used to evaluate the pxeeipitatian trend, FoY this yeas, 17.86 inches of precipitation was measured, xlficb was 1.05 inches greater than the 1961-199p avaiage. October, December, Maxoh. Jvae, July, and August were all belox average- snowyack runoff, as estimated by tatalinq NovembeY through April precipitation values, xas 11.28 inches, which was 2.77 inches above the 3961.1990 average. January precipitation, which vas 2.07 inches above average, accounted for much of this increase. crouad water water Levels. Water levels for all wells that are in the current moa3toriag program are presented is Appendix C. 8ydrographs of all historic data for each well are presented prior to the annual water level report for each respective well ir- tte same appendix. 8y yrasentiag all historic data, trends related to seasonal and annual variability are more clearly evident. water level measuxemeats are taken with a electrical water level indicator, or is the case of a few shallow alluvial wells, directly tram a steel tape. Site information, including sampling frequencies, is presented in Table 3 !Appendix A), Summary of Ground Water Maaitorinq kella. Alluvium. The alluvial monitoring Walls WeAL6-1, 6-2, 6-3, 6-6. ?-1, sad 7-2 are located along HuDAerson Gulch- All wells exhibit water level seasonal variations typical for the alluvium, i.e., shallow after the spring recharge, deepening towards the fall. Water wo r t aa th 6 hi h uld nor be is all through July Ma levels at Wells e p ey 6-1 to -3 are now g y m y due to recently introduced (Nay, 1989) irrl4ation in that area. TAe surface casing of 2