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HomeMy WebLinkAboutDIAMOND SHAMROCK CORNER STORE #1100 PUD - PRELIMINARY - 14-89 - CORRESPONDENCE - TRAFFIC STUDY0 F E L S B U R G H 0 L T & U L L E V I G February 7, 1989 Mr. Ken Baca Real Estate Representative Diamond Shamrock Colorado Division 520 East 56th Avenue Denver, Colorado 80216 RE: Proposed Service Station on West Elizabeth Street Fort Collins, Colorado Dear Mr. Baca: We have reviewed your proposed plan for a service station/convenience store and a car wash on the site on West Elizabeth Street in Fort Collins. We have also had an oppor- tunity to review the Traffic Impact Study prepared by Matthew J. Delich, P.E. (revised in December, 1985) for the proposed Carl's Jr. Restaurant on the same site. The principal traffic issues raised at that time involved: 1. The ability of the access road on the west side of the property to handle the additional traffic. 2. The operational impacts at the access road intersection with West Elizabeth Street. 3. The adequacy of the parking supply. The purpose of this brief letter is to provide to you a pre- liminary assessment of the effect of your current proposal on these matters. The first two issues are affected most significantly by the amount of traffic to be generated by the site. The following table provides a summary comparison of the trip generation anticipated from your proposal with the trip generation previ- ously estimated in the Carl's Jr. study. This comparison focuses on the daily generation and the PM peak hour trip estimates (expected to be the critical time period for both uses). Specializing in Transportation and Civil Engineering 5299 DTC Boulevard • Suite 400 Englewood, Colorado 80111 , (303) 721-1440 February 7, 1989 • Mr. Ken Baca Page Two Daily PM Peak Hour Trips Trips In Out Total Diamond Shamrock Proposal 1,250 75 75 150 Carl's Jr. Study 1,779 148 141 289 The basis for estimating the daily trips in and out of your proposed development is the customer projection data provided by Diamond Shamrock. Based on data published in "A Guide to Trip Generation Rates," Public Works, December 1985, the PM peak hour was assumed to equal 12 percent of the daily traf- fic. It should be noted that the standard trip generation rates published by the Institute of Transportation Engineers would indicate only about 750 daily trips for the station and only 3 percent of these during the peak hour. Therefore, the assumptions in this preliminary analysis should be conserva- tively high. Even with these assumptions, the table indicates that your proposal would generate nearly 30 percent fewer trips per day and about 140 fewer trips in the PM peak hour. With this finding, the impacts of the site on the access road and its intersection with West Elizabeth Street should generally be less than those defined by the previous analysis. Furthermore, a recommendation of the previous study to enhance the intersection operations was to restripe West Elizabeth Street to include a center left turn lane. Based on our recent conversation with you, we understand that this has already been completed. The parking issue should not be a concern with your proposal because of the small number of spaces necessary at a service station/convenience store (7 spaces shown on your plan). The previously analyzed development required 57 spaces to be provided for the proposed uses, thus requiring a shared park- ing analysis. There should be no difficulty providing the necessary number of spaces on your site. February 7, 1989� Mr. Ken Baca Page Three We hope that this brief letter begins to provide a perspective on the traffic impacts of your proposed development. As additional analyses are required in the review of your plans, we will be glad to provide further information to you. Sincerely, FELSBURG HOLT & ULLEVIG e�4�'/w ��a' 1114f Robert W. Felsburg, P.E. Principal RWF/co