Design Engineering Report: Avon Exhibit 1

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Design En;ineer•irt?,r Refwrt. C'ase A"o.'0(15-C'6!'-'38 Toirn (?f,-i vorr'.s Recreational ln-C,hunne! C)iver.t•r{m (RICD) !later Right in the Eagle River DESIGN ENGINEERING REPORT TOWN OF AVON'S RECREATIONAL IN-CHANNEL DIVERSION WATER RIGHT IN THE EAGLE RIVER 1. Background The Town of Avon has filed an application with the Division 5 Water Court to appropriate flows in the Eagle River for a RICD. The application seeks entry of a decree for the purpose of maintaining flows at levels to achieve specific reasonable recreational boating experiences. The flow rates sought represent the minimum amount of flow required for these purposes. Once decreed, the RICD water right would be junior in priority to all existing absolute and conditional water rights. The amounts claimed by the Town for the RICD are the minimum amounts of flow required to operate three hydraulic structures to be constructed in the Eagle River and achieve specific recreational experiences. The periods of the requested flow amounts are based on hydrologic studies Leonard Rice Engineers, Inc. has conducted that are documented in a separate Engineering Report dated June 2006. The amounts requested also represent the minimum amount of water to achieve a reasonable recreational experience. A summary of the RICD flow amounts requested by the Town is shown in Table 1. Table 1 Structure Period 11•2) Amount Experience Level Bab Bob A ri120 - Au ust 7 200 cfs Be inner Bob Junior Ma 1- Jul 20 350 cfs Intermediate Bob Senior Ma 25 - Jul 7 1,400 cfs Advanced Notes: (1) Inclusive of dates shown. (2) From 8 a.m. to 8 p.m. (3) Includes up to a total of 8 days to be specified by notice to the Division Engineer. II. Recreational Experience Sought The category of whitewater boating experience sought by Avon is freestyle kayaking. Kayaking is somewhat analogous to ski sports; there are three main categories of the sport: slalom, extreme and freestyle, and each has equipment modified for that use. Freestyle kayaking appeals to a broader population than the other categories, similar to skiing, from beginner to advanced. Freestyle kayaking can be practiced at a single whitewater feature and repeated multiple times by navigating upstream after being washed downstream. The repeatable nature of freestyle kayaking at a single feature, 1 of 11 ;C] I V E R .,r,??? 2000 /" ? •• • s• ? POBoc212.1 G1ermood'JpnuesColorndoMll_.(4'0)9a"-05oS