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<br />... " <br />.t\M"l;).~ <br /> <br />Aggregated Structures Exhibit 2 presents a summary of the structures and acreage <br />associated with each of the 16 aggregated areas. As presented, these areas range from <br />less than 100 acres (ADW _006_ WhiteAbPiceanceC) to more than 600 acres <br />(ADW _012_ WhiteBIBoiseCr), In addition, Exhibit 2 presents 6 structures which were <br />added in Phase III for modeling explicitly. These were selected in order to refine the <br />modeling of critical areas within the White River Basin and to balance the area associated <br />with each aggregated group. Exhibit 3 presents a list of each structure associated with <br />each aggregated group. <br /> <br />Comment <br /> <br />The following should be noted: <br /> <br />· The ID convention adopted (e,g. ADW_OOl) stands for Aggregated Diversion in the <br />White River Basin. The numbers began from upstream to down stream but currently <br />have no spatial significance. <br /> <br />· The naming convention adopted (e.g. ADW _001_ WhiteNorthFork) ties to the ID, the <br />regional area and/or a nearby stream gage. <br /> <br />· No aggregated structures (WO 10 combinations) occur in more than one aggregated <br />area. <br /> <br />. The Evacuation Creek area was added to the White River network downstream of the <br />State line gage but upstream of the model terminus. This connection allows <br />depletions associated with the White River Basin to be quantified without accounting <br />for water use in Utah. <br /> <br />· A new base flow node was required at Evacuation Creek. Additional base flow nodes <br />may be required during the calibration, <br /> <br />· Whenever an aggregated node was located near a stream gage, gains associated with <br />the gage were moved to the aggregated node location. This allows total depletions to <br />be quantified at gaged locations in the model but resulted in II new base flow nodes <br />at the following locations: ADW _001, ADW _002, ADW _003, ADW _004, <br />ADW_005, ADW_007, ADW_008, ADW_009, ADW_010, ADW_Oll and <br />ADW _014. They were considered within scope because they did not require <br />calculating drainage area or average precipitation (data at the gage was simply <br />transferred to the aggregated node). <br /> <br />· The 6 structures added for explicit modeling as part of Phase III were anticipated <br />under Subtask 1.17, Modified Phase II model. They were located within the river <br />network through discussions with Kent Holt of Division 6 on August 2, 1996 using <br />river mile data recently developed. These discussions resulted in revising the location <br />of structure 430948, Square S Consolidated, to be below gage 09306200, Piceance <br />Creek below Ryan Gulch. Because the timing was appropriate, this refinement was <br />included in the final Phase II results. <br /> <br />2 <br />