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~ ',. .1 . spatial proximity Endangered Species instream flow reaches existing structures modeled new tributaries critical administrative reaches return flows aggregated irrigated area size . . . . . '. ~'If1 t\\e.ct \-\'oJ 2. Boyle: Using a spreadsheet or ArcView script, imttre a structure does not occur in more than one aggregated group, If an aggregated parcel cannot be added to an aggregated group by revising the aggregated group boundary (e,g. it appears as an island within another group), assign the land to the aggregated group where most acreage occurs. ,3,. Boyle: Locate nodes representing the aggregated irrigation structures within the river network by developing an overlay of area tributary to an aggregated irrigation structure using the map developed in Tasks 3.02 as the basis, For budgeting purposes, assume one aggregated irrigation node will be added for every 3 baseflow nodes, In the Yampa Basin there are 72 base flow nodes, therefor approximately 24 aggregated irrigation structures are expected, Present draft aggregated irrigation node locations to the State in map fonn, Revise aggregated irrigation node locations based on State comments. Assign names and ids consistent with established naming conventions to the aggregation nodes and structures, 4. Boyle: Execute the ArcView script provided by the STATE and tabulate the crop types associated with an aggregated group for use in Task 3.09. 5. Boyle: Add to the Task 3,02 ArcView map to clearly show the aggregations of irrigated lands (and river nodes where their diversions will be represented), Print a 24 by 36 inch copy of the map. 6, Boyle: Prepare a Task Memorandum describing the results of the previous step. The memo should tabulate the structures represented by each aggregation in a table generated by Arc View, organized as follows: . Group 1 Aggregated structure location: (describe network position) Associated structures: ID Location Structure # Comment Group 2 Aggregated structure location: (describe network position) Associated structures: ID Location Structure # Comment The memo should describe special cases where the grouping required engineering judgment or otherwise did not conform to the criteria listed under Task 3,03.01. A copy of the map produced in Task 3.03,02 should be included. It is expected that the memo will be 3 pages or less in length, excluding the figure and table. 7. Boyle: Make the Task Memorandum available to the State and to the Division Engineer for review. Hold a half day meeting or telephone call with the Division Engineer to review the aggregation. For budgeting purposes, assume that review will take place in a meeting in Denver, and will be combined with the Division review of Task 3.05; if circumstances require a meeting at the Division Phase IlIa Scope of Services 1161 A-23 Jan 31, 1997