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<br />Consolidated Home Supply Ditch and Reservoir Co, Agenda Item 16a.
<br />September 24-25, 2001 (Updated September 26, 2001)
<br />
<br />Feasibility Studies
<br />Colby Hayden, P,E" of Rocky Mountain Consultants, Inc, has completed the feasibility study in
<br />accordance with CWCB guidelines, The study includes an assessment of alternatives available for
<br />rehabilitation of the Mariano Dam,
<br />
<br />The Consolidated Home Supply Ditch and Reservoir Company
<br />The CHSDRC is a mutual ditch company and a non-profit corporation registered in the State of
<br />Colorado, There are 275 shareholders and 2001 shares of stock, The CHSDRC has the power
<br />to set annual assessments to be paid by the shareholders, the power to cut off water deliveries
<br />to shareholders that fail to pay their assessments, and the power to acquire and sell the shares
<br />of delinquent shareholders,
<br />
<br />Wa1er..Riah.ts
<br />The Company owns water storage rights in Mariano Reservoir, as summarized in Table 1,
<br />
<br /> Table 1
<br /> Consolidated Home Supply Ditch and Reservoir Company
<br /> Mariano StoraQe RiQhts
<br />Water Appropriation Adjudication Amount Administration Comment
<br />RiQht Date Date ( ac-ft\ Number
<br />Mariano aka,
<br />Reservoir ' Aug, 1, 1888 Mar. 22, 1890 5,570.7 14093,00000 Boedecker
<br /> Lake
<br />Mariano Refill once a
<br />Reservoir Jun. 17, 1907 Nov, 14, 1939 5,570,7 29675,20986 year, George
<br />Rist Ditch
<br />Refill 195 cfs
<br />
<br />The Company has consistently exercised the Mariano storage right, filling the reservoir during
<br />the winter and spring and discharging during the irrigation season, The reservoir has both a '
<br />primary storage right and a refill right in amount of 5,570,7 ac-ft. The mean annual reservoir
<br />storage (fill and refill) for the period 1982 through 1997 has been 7,522 acre-feet. Total
<br />diversions by the Company (for all Company reservoirs and ditches) were 23, 631 ac-ft in year
<br />2001,
<br />
<br />Project Description
<br />Three alternatives were analyzed in the feasibility study:
<br />
<br />1, No Action
<br />2, Construction of a toe drain and downstream toe berm ($1,048,000)
<br />3, Complete dam reconstruction ($3,600,000)
<br />
<br />Alternative 3, Complete dam reconstruction, was ruled out as it would increase the cost of the
<br />project significantly as well as increase the time required to complete construction, with little
<br />added benefit. Alternative 2, Construction of a toe drain and downstream toe berm, consists of
<br />economical construction techniques that are commoniy employed to repair seepage and
<br />downstream slope instability, It was the alternative with the least overall cost that was a
<br />permanent solution to the problern. This alternative will allow full reservoir storage and is
<br />considered the preferred alternative, The no-action alternative was considered unacceptable
<br />since it would mean that the reservoir could not be filled and used for irrigation by the
<br />shareholders,
<br />
<br />2
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