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2 The increase of vehicular traffic in the immediate vicinity of the reservoir is attributed to the impending completion of Interstate 80. Only about 30 miles remains to be completed of this highway 'Which will link Denver and the East Coast with a mlti-lane highway. Traffic volume on this highway increased nearly nine percent between 1960 and 1966. . Based upon these foregoing factors the anticipated recreation visitor days per year is estimated to be 930,000 when the recolllDlended initial recreation development has been completed. As in the earl.ier report it is estimated that the majority of the visitors will originate from the zone of recreation influence described as the area within the 6o-mile radius and adjacent cities. With the assumption that the population in the region will continue to increase and water-oriented recreation will continue at its present popularity, it is estimated that in about 25 years after the initial development has been completed the annual visitor day use will be 1,225,000. , Contract cost of the initial reCreation development, exclUding costs to purchase additional land, is presently estimated to be $1,145,000. This coat reflects the current construction cost increase as provided by the Bureau of Reclamation, as well as the additional dlllve10pment needed for the anticipated increase in recreation use. The ultimate contract costs for the recreation development is estimated to be $1,300,000, again excluding additional land purchaslll. This estimate includes the initial development and added facilities to provide for the estimated recreation use in 25 years. The calculated annual cost required to replace these initially installed facilities over their 25-year usable lif'etill1e and based upon the current interest rate of 4 5/8 percent is $25,.300. For the 25-year development it is $28,700. Current contract cost indexed to reflect January 1969 prices for the recommended land acquisition of 2,810 acres is estimated to be $482,500. The foregoing development and land cost does not include a 20~ % contingency and 26+ % indirect cost factor. Costs for the net annual administration, operation, and maintenance (AO!tM) of the initial recreation development are estimated to be $114,500. ' Ultimate AO&M would 8lI\0unt to $130,000 annually. These costs are the responsibility of the administering agency and are, therefore, a non-Federal cost.