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Upstream Recreation Demands Water-oriented recreation cannot be considered one of the primary purposes for constructing the Bridge Canyon and Marble Canyon reservoirs because less costly alternatives for expanding recreation facilities in this area are available. The types of water-oriented recreation which could be supplied by these reservoirs are available at Lake Mead and Glen Canyon National Recreation Areas. These recreation areas serve the same population centers, and facilities could be added as recreation demand expands. It is recognized, however, that if the proposed reservoirs are built, people will make visits to them. A minimum amount of basic recreation facilities would be required to take care of these visitors, and studies are needed to determine what minimum facilities are essential and what they would cost. A reasonable estimate of the monetary benefit of providing essential facilities to accommodate the visitors is that they are equal to the cost of providing them. No additional recreation benefits can be claimed for the proposed Bridge Canyon Dam because of the unusual existing recreation values of the proposed reservoir area and the adverse effects the dam and reservoir would have on these values. The reservoir would eliminate the natural stream which created the Grand Canyon and has been continuing to wear down and deepen the canyon. The natural forces which carry silt and 2Epson Perfection 4870 Photo, 400 dpi, 8 bit, 16,023,552 byte