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<br />The ISA would retain Ihe channel in its original condition and reflects an F- Type "entrenched" channel for the <br />majority of its length. Sinuosity would remain low and no pooVriffle sequences would be developed. Habitat values <br />would be limited in the existing channel. An analysis of hydraulic geometry relationships and width/depth ratios <br />suggests that the existing channel is out of equilibrium with the post-project hydrologic regime. The entrenchment <br />ratio suggests that it is out of equilibrium with its floodplain as well. Riprap protection and the excessive freeboard <br />associated with the dikes would continue to maintain the channel within the project limits. <br /> <br />The ECMA would be constructed as a typical B- Type channel and would be a moderately entrenched rapid-pool or <br />step-pool type channel. The hydraulic capacity and width/depth ratio of the main channel suggest that the river <br />would be in contact with its floodplain on a relatively frequent basis (1.5-year event frequency). The actual acreage of <br />the floodplain and associated habitat values would be limited in all reaches except Reach 4. This condition is defined <br />in the entrenchment ratio column of Table 2. An analysis of the hydraulic geometry indicates that the ECMA <br />channel would be in static-equilibrium. The pool morphology would be highly dependent on a future condition of <br />limited sediment production. Channel slopes would be relatively steep. reflecting the step/pool type morphology. <br />Pool to pool spacing and pool plus run lengths suggest good habitat values would be reflective of this type of <br />channel. <br /> <br />The RHRA would be be constructed as a typical C- Type channel and would be a slightly entrenched meandering <br />stream. Channel sinuosity reflects the historical conditions and would be concordant with the post-project <br />hydrologic and sediment transport regime, channel and valley slopes. Meander pattern, meander belt width and radius <br />of curvature would be in equilibrium with the hydraulic conditions dictated by the post-project reservoir release <br />schedule. Widtbfdepth ratios and hydraulic geometry present a close fit to values documented by previous <br />investigators on natural streams (Leopold and Maddock 1953). This "close fit" suggests that the cross sectional <br />geometry would be in equilibrium with the hydrology, channel hydraulics and sediment transport regime of the post- <br />project Provo River. Pool to pool spacings correlate well with predicted values for this characteristic stream. Pool <br />plus run ratios should provide excellent habitat values and are reflective of undisturbed stable streams of this type. <br />Pool morphology, channel and meander patterns characterize a dynamically metastable river system. Hydraulic and <br />sediment transport design criteria, localized natural bank armor and the reduction of bed and bank shear stresses <br />through manipulation of bed slope and bed material would provide assurances of erosional stability within the <br />RHRA project limits. <br /> <br />MUL Tl.OBJECTlVE PLANNING <br /> <br />Multi-objective planning for the PRRP project was comprised of two key elements: integrating a wide variety of <br />technical disciplines in the planning and design process, and including all stakeholders and interested agencies in the <br />planning and decision-making process. <br /> <br />As stated earlier. the overall objective of the restoration project was to develop a self-sustaining. geomorphically <br />stable riverine system which would have all the values of natural river systems. Specific objectives included <br />developing an outstanding naturally reproducing trout fishery; developing a recreation corridor along the river; <br />enhancing wetlands and other riparian resources; accommodating existing agricultural and residential land uses in the <br />river corridor; and preserving irrigation diversions. In addition, the design had to take into account habitats of <br />treatened and endangered species including the Ute ladies tresses orchid and the western spotted frog. As a result, the <br />project team had to include experts in civil engineering. hydrology. geomorphology, river mechanics. fisheries <br />biology, wetland biology. endangered species, recreation planning, water rights, and environmental regulations. The <br />ability of team members to address their own specialty while still understanding the relationships between the <br />various technical aspects of the project was critical to successful development of a project concept and feasibility- <br />level design. <br /> <br />A greater challenge than managing a diverse project team was managing the various stakeholders and interested <br />parties. Coordination was crucial with the following agencies, organizations and groups: <br /> <br />4 <br />