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<br />I. INTRODUCTION <br />The Hartland diversion dam, serving the Hartland Ditch, is located on the Gunnison <br />River near Delta, CO. The Hartland diversion dam consists of a low head dam that is currently <br />a barrier to fish passage. As part of the Upper Colorado River Endangered Fish Recovery <br />Program (Recovery Program), passage is proposed at the dam to provide fish access to <br />historic habitat further upstream on the Gunnison River. The target species for this project <br />include the Colorado pikeminnow (Ptychocheilus lucius) and the razorback sucker (Xyrauchen <br />texanus). <br />The purpose of this document is to present conceptual alternatives for establishing fish <br />passage at the Hartland diversion dam and to generate input by key project participants prior to <br />developing final plans. This document includes general criteria for conceptual layout and <br />grading of three alternatives; development of basic design information to support the final <br />design process including hydraulics, hydrology, and mapping; cost estimates to assist in <br />alternative selection; evaluation of pros and cons of each alternative; and recommendations to <br />assist in the development of the final design. This document also presents general criteria for <br />layout and design of a fish screen and bypass return channel to be installed along the Hartland <br />Ditch downstream of the diversion structure. <br /> <br />1 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />