C153954 Contract

• Contract/PO #: C153954
• Contractor Name: Leonard Rice Consulting Water Engineers
• Contract Type: Grant
• Water District: 0
• Loan Projects - Doc Type: Contract Documents

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in the upper South Platte Basin, generally upstream of the South Platte at Denver streamflow
gage. For purposes of budgeting, it is estimated that these memoranda will be available for
review by the State.

Objective:

Identify key storage facilities and develop and document an understanding of the operations of
key water use facilities in the basin in order to facilitate consumptive use modeling and to
support selected data needs for modeling being done by other contractors. This understanding
will be developed through interviews of DWR personnel, operators of large canal and reservoir
systems, and representatives of federal facilities. Through interviews with reservoir owners and
operators, collect historic content data, evaporation data, and information regarding reservoir
accounts, dead storage, and release rates. Fill missing reservoir end-of-month contents using
techniques developed for CRDSS and RGDSS.

Approach:

5.1 Identify and fill storage records for key reservoirs. Key reservoirs were identified during
the feasibility study as reservoirs with greater than 10,000 acre-feet decreed storage
rights. The 59 key storage reservoirs represent 85 percent of the storage in the North
Platte, Laramie, and South Platte river basins. Collect storage data from the reservoir
owners and operators. Identify, document, and resolve conflicting storage records. Fill
data using applicable techniques developed in previous CDSS efforts.

5.2 Based on existing information and knowledge gained during the SPDSS Feasiblity Study
and during Tasks I through Task 4, outline interview topic areas and questions. Select
entities to interview and establish interview schedules. Contact other SPDSS consultants
by phone to learn their projected information needs from the selected interviewees and
incorporate those needs into interview outlines where possible. Develop standard format
for operating memoranda.

5.3 Develop understanding of operations for approximately 163 ofthe estimated 319 key
diversion structures identified in Task 3. Note that an understanding of operations for
many of the key structures that irrigate with direct diversion rights only will be included
in the water district summaries developed in Task 3. It is estimated that approximately 50
key diversion structures (out of the 163 recommended in the Feasibility Study) will
require interviews with ditch owners and water users to understand operations. As
reflected in Exhibit D, Task Compensation, it is anticipated that 20 interviews will be in
person and 30 will be by phone.

5.4 Develop understanding of operations for the 19 transbasin diversions identified in Task 4.
Several of the transbasin diversions are operated by a single owner, therefore it is
estimated that approximately 15 interviews with owners and operators will be required.
As reflected in Exhibit D, Task Compensation, these interviews will be held in person.

5.5 Develop understanding of operations for the 59 key storage reservoirs identified in Task
5.1. Several reservoirs are owned and operated jointly under a single operation (ex.
Colorado-Big Thompson Project) and it is anticipated that the description of their
operations will developed through a single interview and combined in a single

SPDSS Consumptive Use and Water Budget Component

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