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, 10 o N .....,J.... CO the current interest rate of 8.75%. A 2% operation and maintenance ; cost was included. The amortized cost was then divided into the estimated annual tonnage of salt that could be controlled w1ththe implementation of these practices. The resulting val~eis the . salinity cost effectiveness of the proposed improved land treatment' inarangeland watershed. This figure is a consistent val~ethat can be used by planners and managers to compare the salinity cos.t. effectiveness of proposed improved land treatment throughout the. Colorado River Basin. A mapping scale of 1:100,000, 1:62,500 or 1:24,000 was chosen .in consultation with field office personnel. The base map for the . report was the watershed hydrologic boundary as.interpreted,.from. the Watershed Map' of the state of Utah. In some cases the'. Watershed Map boundary was modified to reflect the hydrologic boundary or more detailed topographic maps. PHASE II PROCEDURES A Phase II evaluation entails four stages of work andean be accomplished by a team of experienced interdisciplinary specialists in a four week period. It is recommended that each member of the team have at least five years experience in using their technical expertise in watershed or resource evaluations. The use of sound technical judgement is critical for accurate and successful resource evaluations. The primary team is augmented by field specialists with knowledge of resource conditions within a specific watershed. The field specialists that support the primary team can include range conservationists, soil conservationists, soil, scientists, biologists, archeologists, watershed'planners and any other discipline necessary to accomplish a complete evaluation. . The first week involves watershed drainage area map preparation, review o,f available technical' publications about the watershed and . coordination with the field 'specialists that will be assisting ..in . the field reconnaissance. Working copies of watershe.d maps.are necessary for field use and to record the geomorphic unit boundaries. . The scale of working map should be determined in consultation with the field specialists to insure that a useful map is developed in the final report. It was determined that maps of the watershed on the scales of 1:250,000, 1:100,000 and 1:'24,000' were useful in the field reconnaissance stage but not all maps were used in the final report. If possible, the precipitation i$olines should be plotted on the 1:100,000 scale map. The second week is the field reconnaissance with the aUg.mentedteam and includes designation of geomorphic units within the watershed based on land form, land use, geology, rangeland condition, . subwatershed boundaries and erosion condition. During the second week thePSIAC sediment yield procedure (1968) is used to characterize the Present, FWOP and FWP conditions in each geomorphic unit. The approximate salt content of the soil and rock units is estimated in the field. Soil and weathered rock samples are taken from targeted geomorphic units for analysis of salt ; , ';.;