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Scope of Work <br />PHABS[M, IFIA, and consider�tion of other aquatic-related factors. Flushing flo4v needs at <br />each site ���ill be investigated using the PHABSIM cross-sectional data, including substrate <br />pebble counts, and appropriate sedirnent mobilization and transport models. 'The rtsults will <br />be doc�unented t<�Ilo���ing the format urilized in Ph��sc: 2. <br />3.?.Z Survey transects at Reeder Creek, T'roublesome Creek and lower Blue River. F�lushing tlows <br />arid substrate infiormation will t�e investigated. <br />.3.2.3 Condz�ct troi�t spawning surve}�s (i.e. rcdd survey�s) durir�g tt�e fall to ideutify important <br />spa��vning bars for both raii�bo�v and br�wn trout. <br />3._.�/ Work with the Couilty ro develop ��ater anci air ter7�perature monitoring and t7ow monitoring <br />recommendations for suininer rnoni�toring. <br />.3.?.J V1�'ork with the County to develop recommenciations �f�or new permanent USGS �,�age sites. <br />.3.2.6 C<�(lect lvailable fish counts and biomass data and add to reach bv re;ach summaries. <br />�.?. � Asser�tble dZta. <br />3. 3 Assessment of Field Data <br />3.3.1 Prepare tables, figures, photos of 2008 field data and stream assessments. <br />3.3.2 Verify spawning habitat suitability curves from previous analysis with 2008 redd data, and <br />field surveys. <br />3.3.3 Compile PHABSIM analysis results for 4 new cross sections. Run analyses for single study <br />sites (Blue, Reeder and Troublesome) including flushing flows. <br />3.3.4 Review flushing flow recommendations from Phase 2 and compare to this year's field <br />assessment (riffle stability index analysis and redd particle size data). <br />3.3. S Review and finalize all flow-habitat relationships at all study sites. <br />3.3. 6 Compile 2008 data. and incorporate into the Stream Management Plan <br />3.4 Assessment ojFlow Regime� For the purpose of this proposal the following analysis pertains to <br />the 14 reaches with PHABSIM study sites developed in Phases 2 and 3a. These reaches are <br />referred to below as `study reaches'. This evaluation is to assess what approach (flow versus <br />restoration) has the greatest potential to influence the situation that is protective of the future <br />stream conditions and flow needs. <br />3.4.1 Future Conditions Flow Regimes: Tetra Tech sha11 conduct a time series analysis for future flow <br />conditions with and without the proposed mitigation measures as outlined below. The <br />hydrographs for dry, normal and wet years shall be supplied by Denver Water and Northern <br />O Grand County Colorado TETRA TECH <br />Stream Marragement Plan, Phase 3B 3 <br />TETRA TECH <br />