C150264 Feasibility Study

• Contract/PO #: C150264
• Contractor Name: Lower Latham Reservoir Company
• Contract Type: Loan
• Water District: 0
• County: Weld
• Loan Projects - Doc Type: Feasibility Study

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agreement will expire after March 2008. LLRC is currently pursuing an extension to the current
exchange agreement. The exchange agreement allows LLRC to exchange water allocated pursuant
to its C-BT ownership for augmentation water supplies. Unless a long-term agreement can be
obtained, this is augmentation replacement supply will not be available in a permanent plan for
augmentation a.nd therefore, the alteIllilte replacementsources LLRC is seeking funding from CWCB
for will be needed.

VI. POTENTIAL REPLACEMENT SOURCE ALTERNATIVES

LLRC has considered multiple replacement water sources for use within the plan for augmentation
and the potential for no additional sources. It has been concluded that additional replacement sources
are necessary in order provide sufficient replacement water during extended drought periods. Lower
Latham Ditch Company shares have been determined to be an excellent replacement source because
they have senior water rights that sustain a high yield during both average and drought years. In
addition, implementation of the shares into the LLRC plan for augmentation is easily achieved from
an operational standpoint. The location of the point of the diversion and river delivery structures
provides augmentation deliveries in the location necessary for the plan for augmentation. Also, the
close working relationship between the LLRC and LLDC provides assurance that the necessary
deliveries are achieved.

A. Lower Latham Ditch -1
/'
The LLDC owns four priorities in the Lower Latham Ditch and one priority in the Lower Latham
Drain. The following table summarizes the priorities owned by LLDC.

Summa "I' of Water Ril hts owned bv Lower Latham Ditch Comvanv
Water Right Name TS RNG SEC Q160 Q40 QIO ADJ. APRO. CASE USE RATE
DATE DATE NO TYPE (cfs)
Lower Latham Ditch 5N 65W 31 NE NW NE 4/28/1883 5/12/1869 CA6009 lRR 20.4 cfs
Lower Latham Ditch 5N 65W 31 NE NW NE 4/28/1883 12/121l874 CA6009 IRR 35.77 cfs
Lower Latham Ditch 5N 65W 31 NE NW NE 4/28/1883 11114/1877 CA6009 lRR 97.68 cfs
Lower Latham Ditch 5N 65W 31 NE NW NE 4/28/1883 10/24/1881 CA6009 IRR 133.88 cfs
Lower Latham Drain 5N 65W 32 NE NW 8/2/1918 7/81l893 3/11l889 CA54658 IRR 35.0 cfs

The 2008 SWSP (Appendix C) includes a more detailed description of the water rights and a table of
historical diversion records.

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