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.' . . ~,.... o 00 w PART VII. ANTICIPATED EFFECTS OF ADDITiONAL DEVELOPMENTS In order to est imate the probable effect of the authorized, part ially completed, or contemplated developments on the quality of water at certain points along the Colorado River, the developments have been generally listed in downstream order. By following the flow and salts down the river the est imated effects of the development can be shown at the pert inent stations for the years 1990, 2000, and 20l0. These results are tabulated in Table E for the new period of record used in th is report. The table was computed on the basis of the 1941-78 average annual flow and total dissolved solids. An additional station, "Colorado River above Pal-ker Dam," was included in the table for purposes of clarification and main- taining continuity in computations. It should be noted that future concentrations were estimated without consideration to possible future control measures. Salinity control measures are discussed separately in Part VIII. The ant ic ipated future cond it ions evaluated in Tab Ie E would result from the construction of both Federal and non-Federal developments. Pickup of dissolved solids from newly irrigated lands where comprehensive studies have not yet been made has been computed for two assumed conditions, 0 and 2 tons per acre (0 and 4.5 t!ha). The future increase in evaporation over average present evaporat ion, by the Colorado River Storage Reservoirs, was considered negligible and therefore not included in future depletions. Present evaporations are reflected in present modified conditions. Following is a discussion of the various projects including a brief descr ipt ion of the phys ical cond it ions for each deve lopment authorized or contemplated for authorizat ion. It should be recognized that the acreages and depletions as listed could change with change of plans on some of the contemplated projects. The figures presented below and in Table Dare those wh ich were current at the time of writ ing th is report. In add it ion to the developments listed, a number of smaller private industrial develop- ments either under construction or contemplated will result in certain depletions and will have some effect on water quality. The effects of all upstream developments are carried on down to and including Imperial Dam. A. Description of Projects 1. Above Green River near Green River, Wyoming Seedskadee Project. Th is mult ipurpose project is located adjacent to the Green River in southwestern Wyoming. Water uses of the Seedskadee Project are not def in ite, but it appears that most of the water will be used for industrial purposes. now A 47