Design Engineering Report: Avon Exhibit 1

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P. Csi,?Iri E;nginetrri?rg Reprll•i, C use No.2005-04'-258 low,n qf.avun's Rec:reutional Irt-Channel Uivrrsiari (RICD) li•ater Right in the Eugle Itiver termed "Park and Play", is what creates a popular destination. A"Rodeo" is the typical name given to a freestyle kayaking competition; these competitions are often staged at individual whitewater features. A whitewater feature is created where there is a"hydraulic jump," which is an abrupt rise in the water surface of a channel. A hydraulic jump can occur naturally, or can be created (as in a whitewater park) by the placement of structures or boulders in the river bed. The hydraulic jump is what creates the freestyle recreational experience. A hydraulic jump in the river channel is typically referred to as a wave, a hole or a wave- hole. Three features are being implemented at Avon. Each is designed to appeal to a different skill level, similar to the skill levels associated with blue, black, and double black diamond runs at a ski area. The natural class of the rapid in the Avon course is Class III. True novice boaters are not expected in the course. Even a beginning freestyle kayaker must have certain kayak skills such as "eddy catching", "ferrying", "bracing" and "wet exiY" or "combat rolling". Beginner freestyle kayakers would be able to practice and hone skills in the small hole at the designed "Baby Bob" feature. Intermediate freestyle kayakers would be able to expand on their hole surfing skills with wave tricks at the wave hole of the designed "Bob Jr." feature. Advanced freestyle kayakers require wave features to hydroplane the kayak for advanced moves. The designed "Bob Sr." feature would provide opportunity for advanced freestyle kayakers and a venue to host "Rodeo" competitions. III. Reach Length The distance from the invert of the upstream feature to the downstream feature is 348 feet and also the length of the corresponding RICD. There is a total hydraulic drop within the reach of 5.5 feet. The average slope is 1.6% from structure to structure. The average widths range between 35-65 feet. The site is designed to be navigable for its entire length. IV. Measurement and Administration of the RICD The project is fortunate to have the USGS GAGE #090670201ocated 3,200 feet downstream of Bob Sr. Administration of the RICD by the Division Engineer may be based on measurements from this gage, with or without accounting for the inflows and outflows that occur between RICD reach and gage. The following 3 diversions and 2 returns are located between the RICD and the gage: 1. Beaver Creek Golf course return 10 feet downstream. 2. Beaver Creek Metro District Pump Station 240 feet downstream (October through Winter) 2 of 11 , A I VE R Jz,tW 2006 M.X... ??? P(1 Bi??' 123 Git?i«co:l Sprine> C'olo?.ido $ IG02 i970i947•95o8