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<br />VII-IO <br /> <br />Nume rous es t i mat i ng algor i thms have been deve lop€:d based upon eva 1 uat ions <br />of wi 11ingness to pay, consumer demands, the avai labi lity of alternative <br />recreation, measurements of pyscho10gical stimulation, and others. Some <br />of these techniques are more arbitrary than others and some are totally <br />impractical. <br /> <br />One of the least subjective and most practical techniques is to evalu'" <br />ate intangible benefits in terms of someone's wi 11il1gl1<:,ss to pay for <br />that benefit. In the case of privately owned recreational and scenic <br />areas, the admission charge is generally representative of the value <br />of an experience. In the case of publicly owned facilities, monetary <br />values are indirectly expressed in the expenditures incurred in a <br />recreational trip or the cost of admission at a similar private area. <br /> <br />Several intangible benefits were identified for each of the Lena Gulch <br />drainageway improvement alternatives. Dollar values for th"se benefi ts <br />We'"e estimated on the basis of the princip"les of the "wi 11 ingness to pay" <br />method. For those areas designated as graSS-lined channels, the intan- <br />gible benefits were estimated for recreational and commuter bike paths, <br />walking and hiking activities, and picnic areas. For each detention <br />basin, an estimate of the benefits derived from winter ice skating and <br />sledding, summer picnics, and educational field trips were included <br />whel-e app rop r i ate. <br /> <br />UnIt values utilized in the development of the: intanqibl" benefits are <br />su~marized as follows: <br /> <br />I) Detention Basins <br />- Ice Skating: 2,000 visitors per year $1.50/vi sit <br />- Picnic Table: 260 visitors/table/year '$0.75/vislt <br />- Educational Field Trip: 500 visitors/year $1.OO/visit <br /> <br />2) Passable channels (Public Access) per 1,000 foot of channel <br />- Recreation and Commuter Bike Paths: <br />500 visitors/week 26 weeks/year $0.25/visit <br />Concrete Channels: <br />50 visitors/week 26 weeks/year $0.10/visit <br />Grass Lined Channels: <br />200 vis i tors/week 26 weeks/y,~a r $0. 25/v is i t <br />Picnic Tables: <br />260 visitors/table/year $0.75/visit <br /> <br />3) Hiking in Apex Gulch <br />- 100 hikers/week 26 weeks/year $l.oO/visit <br /> <br />4) Educational Field Trips to Apex Gulch <br />- 750 visitors/year $1.00/visit <br /> <br />The dollar value of intangibles for various entities and alternate plans <br />are summarized in Tables VI 1-3, 4, and 5. <br />