WSPC03144

• File Number: 8283.200
• Description: Colorado River Basin-Colorado River Computer Models-Colorado River Decision Support System
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 6/12/1996
• Title: Boyle IIIa WRP Enhancement-Phase IIIa Scope of Services-Tasks 1-11-Draft
• Water Supply Pro - Doc Type: Operating Principles/Plan

STATE: FJr th~RDSS Phase II reservoir coverage map, identify locations for a
maximum f three gregated reservoir nodes __
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RTIWR: Modi the STATEMOD input file to include up tQ three aggregated reservoic:::>
nodes with wo account per reservoir and locate these nodes within the Phase III model
network. The operatioruil account for each of the aggregated reservoir nodes would have
a capacity estimated as one UWd of the cwnulative net absolute storage decree for the basin,
The non-operational account for each of the three aggregated reservoir nodes would have
a capacity detennined as one-third of the cumulative basin stock pond capacity in the basin:...--;,..-:;
RTIWR: Assign an area capacity curve for each of the aggregated reservoir nodes based .J ~?
on an existing reservoir in the basin of equal size or engineering judgement. Modify the Jtvr {/~ -
STATEMOD input files to reflect area capacity information, Assign the Phase II
evaporation curve for the White River Basin to each of the aggregated reservoir nodes,
Modify the STATEMOD input files to reflect evaporation information.
RTIWR: Develop an operational file to release water from the operational account in July,
August, and September. The operational account would be released to the river: 25 %
during July, 50% during August, and 25% during September. The non-operational account
would be depleted only by it pro-rata share of evaporation. ,7r:r t, vr-d!
7, RTIWR: Estimate an end-of-month content file by assuming the aggregated r~irs were "c<-V_~,.L
.--nJaiiifa1ned at a constaliin5 % Qf cap!!9tpthroughout the study period, Modify the
STATEMOD input files to reflect end-of-month information,
RTIWR: (!Cun watri~ for all reservoirs to be aggregated to determine storage decree
weighted administration numbers for each of the White River Basin irrigation water rights
aggregation classes. The same 10 administration number classes as determined through the
analysis of the irrigation diversion rights will be used. Each decree weighted administration
nwnber will fIn both accounts (operational and non-operational) for each of the aggregated
reservoir nodes. The cumulative decree amount for each of the administration number
classes will be divided by three and represented at each of the aggregated reservoir nodes,
Create a basin report summarizing the number of water rights included in the aggregation,
the swn of decrees on aggregated water rights, and the number of water rights. (the format
of the basin summary report will be identical to the report generated for irrigation
structures)
STATE: Document the determination of aggregated reservoir/stock pond nodes, their
associated decree weighted administration numbers, their location in the Phase III network,
their physical capacities, end-of-month content, and monthly targets in a 4-6 page draft
memorandum. RTI will provide written comments prior to the State's fInalization of the
memo.

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Phase IlIa Scope of Services

DeIiverables:
1. List of net absolute storage rights in White River Basin not modeled in Phase II.
2. Cumulative total of stock pond capacities for White River Basin as described in a memo.
3. Locations of three aggregated reservoir nodes.
4. Set up of capacities in reservoir files for aggregated reservoirs.
5, Assignment of area capacity curves and evaporation stations to aggregated reservoirs,
6, Operational file to operate releases from the aggregated reservoirs.
7, Statemod input files reflecting assumed end of month contents for base flow generation,

A-19

June 12, 1996

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