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<br />- -D-0092() <br /> <br />FINAL MEMORANDUM <br /> <br />~ <br /> <br />TO: <br /> <br />File <br /> <br />November 4, 1996 <br /> <br />FROM: <br /> <br />Meg Frantz and Roger P. Sonnichsen <br /> <br />SUBJECT: <br /> <br />Task 3.01 Yampa River Phase II Instream Flows <br /> <br />Introduction <br /> <br />This memo describes the approach and results oblained under task 3.01, Phase II Instream Flows. The <br />objective of lhis lask was as follows: <br /> <br />Modify Phase II model input to reflect changes in the way instreamflow reaches are specified to <br />Statemod. <br /> <br />Approach <br /> <br />The Yampa Phase II .net file was modified as follows: <br /> <br />. File yampa.net: Remove all instream flow nodes (IS F) greater lhan .01 and rename *.01 <br />instream flow nodes to whole numbers. (Example: Change the Lower Bear River instream <br />flow node from 582202.01 to 582202). Add a terminus node for each instream flow reach <br />using the instream flow node type (ISF). Assign the terminus node the number of lhe <br />instream flow node plus _Own. See the Yampa River Basin Network (Exhibit 1) for specific <br />placement of terminus nodes. Note that the Lower Elk River inslream flow node (581355) <br />was moved upstream of the Elk Wheeler Bros. Dilch node (580928) after review of the <br />Tabulalion of Inslream Flow Water Rights. The terminus node for East Williams Fork <br />instream flow node (449999) was placed below East Gieser Ditch node (440635) after <br />review of the Tabulalion of Instream Flow Water RighlS. <br /> <br />Once the yampa.net file was changed then the dmi makenet was run to update the yampa.rin file and lhe <br />Basin Nelwork diagram. Using the updated yampa.rin file the dmi watright was used 10 create initial <br />versions of the yampa.ifs and yampa.ifr files. The initial versions of yampa.ifs and yampa.ifr were ediled <br />as described below. All manual edits were documenled in the revision notes of the modified files. <br /> <br />. File yampa.ifs: Manually add the structures for Williams Fork River (449998) and East <br />Williams Fork River (449999) as these are not in the database. (They are very recent <br />adjudications.) Manually add lhe terminus nodes 449998_0wn and 449999_0wn for these <br />instream flow structures. <br /> <br />. File yampa.ifr: Manually add the righls for Easl Fork Williams Fork River (449999.1) and <br />Williams Fork River (449998.1) inslream flow structure, seUing the diversion righl amounl <br />to the maximum demand. Manually change the right amount for Bear River (582404) from 5 <br /> <br />BCIrILE <br />