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ILower South Platte River Study
<br /> Colorado Water Conservation Board
<br /> IDecember 2001
<br /> • Overall, the project would benefit from modernization and rehabilitation of all
<br /> I existing facilities to more closely meet present-day standards for embankment
<br /> dams
<br /> IThe above-noted concerns would be addressed during the design of major
<br /> rehabilitations or enlargements of the dams and reservoir.
<br /> IIn 1998, Wheeler-Kumar completed a feasibility study of rehabilitating and
<br /> enlarging Julesburg Reservoir. That study included an evaluation of three basic
<br /> Ialternatives and several variations, as summarized below:
<br /> Alternative A - No increase in storage capacity; minimal rehabilitation of Dam 1
<br /> IAl - Rehabilitate Dam 1
<br /> A2 - Rehabilitate and reconstruct Dams 1, 1A, 2, 3, and 4 (Dike)
<br /> IAlternative B Increase storage capacity by 5,300 acre-feet. Raise,rehabilitate
<br /> and reconstruct Dams 1, 1A, 2, 3, 4 (Dike), 4, 5, and appurtenant
<br /> Istructures.
<br /> Alternative Cl Raise, rehabilitate and reconstruct Dams 1, 1A, 2, 3, 4 (Dike), 4,
<br /> I5, and appurtenant structures. Increase storage by 10,100 acre-
<br /> feet.
<br /> I Alternative C2 Raise, rehabilitate, and reconstruct Dams 1, 1A, 2, 3, 4(Dike),4,
<br /> 5, and appurtenant structures. Dam 2 is replaced with a new
<br /> structure. Increase storage by 10,800 acre-feet.
<br /> I Alternative C3 Raise, rehabilitate, and reconstruct Dams 1, 1A, 2, 3, 4 (Dike),4,
<br /> 5, and appurtenant structures. Dams 1 A, 2, and 3 are replaced
<br /> with a new dam located downstream to provide more storage.
<br /> IIncrease storage by 21,900 acre-feet.
<br /> I Cost estimates presented in the Wheeler-Kumar Report (1998) are summarized below and
<br /> updated to 2001 price levels:
<br /> I Alternative Additional Storage t't 1998 Cost t21 2001 Cost(z) Unit Cost
<br /> (AF) ($) ($) ($/AF)
<br /> Al 0 _ $381,000 $430,000 ---
<br /> I A2 0 $8,015,000
<br /> $12,583,000 $8,820,000 —
<br /> B 5,300 $13,800,000 $2,610
<br /> C1 10,100 $14,962,000 $16,100,000 $1,590
<br /> C2 10,800 $17,851,000 $19,500,000 $1,810
<br /> IC3 21,900 $22,962,000 $25,100,000 $1,150
<br /> (1) Over and above the 22,900 acre-feet of existing storage.
<br /> I (2) From Wheeler-Kumar report dated March 1998.
<br /> (3) Evaluation at approximately 3 percent per year over three years;added 10 percent to 1998 cost and rounded.
<br /> IGEI Consultants, Inc. 4-10 01002 Dec 2001 Lower South Platte River Study
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