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<br />ESTIMATED COST OF ALTERNATIVE lEVELS FOR ON-FARM IRRIGATION IMPROVEMENTS Jj21
<br />
<br /> level One level Two level Three
<br /> No. Of No. of No. of
<br />Structural Element Units Items Est. Cost Items Est. Cost Items Est. Cost
<br /> Thousand Thousand Thousand
<br />Measuring Devices No. 10,500 $ 3,070 6,300 $ 1,810 6,300 $ 1,810
<br />Ditch Lining length MI. 2,600 59,210 1,260 28,490 1,250 34,110
<br />Earth T.W. Ditch length MI. 160 50
<br />lined T.W. Ditch length MI. 300 4,540 300 4,540
<br />Dlt"h Structures No. 28,200 8,240 17,000 4,900 21,100 9,715
<br />Pipeline length MI. 175 3,895 610 13,525 610 13,600
<br />Pipeline Structures No. 2,000 590 7,700 2,205 7,700 2,205
<br />Gated Pipe length MI. 45 815 695 12,735 690 12,800
<br />leveling Ac. 31,200 8,190 77 ,200 19,855 76,800 21,860
<br />Open Drain length MI. 2 25 2 25 2 25
<br />Closed Drain length Mi. 130 4,915 130 4,915 130 4,915
<br />Automation Ac. 140,000 2,420
<br /> Total Cost $89,000 $93,000 $108,000
<br />1/ Price Base: 1979 Dollars Including 15~ contingency, and
<br />21 Based on treating 140,000 acres through the accelerated program.
<br />
<br />IMPLEMENT AT! ON
<br />
<br />Al TERNAT I VES
<br />
<br />The Implementation program needed to signifi-
<br />cantly redu"e salt loading In the Colorado
<br />River requires acceleration of on-going USDA
<br />programs and the cooperative effort of
<br />federal, state and local agencies, and,
<br />pr I vata organ i zat ions. Act i ens assent 1 a I to
<br />a successful Implementation program are:
<br />
<br />The pr I mary object I ve I s to reduce the
<br />salt pl"kup from the valley by Improving
<br />Irrigation efficiency and improving water-
<br />shed conditions. Seepage losses from
<br />unlloed ditches and deep percolation from
<br />field irrigation are considered to be the
<br />major sources of poll utlon. Three levels
<br />shown in the above table were developed
<br />for consideration by the sponsors. level
<br />one considered an improvement in Irriga-
<br />tion management by changing the time of
<br />set and some system improvements; the
<br />second level considered more extensive
<br />Improvements in existing systems and
<br />management of the time of set and flow
<br />rates; the third level, similar to level
<br />2, I nc I udes the use of automat I c contra Is
<br />to achieve precise timing of irrigation
<br />sets and measurement of flows.
<br />
<br />1. A I eve I of federa I fund I ng that prov ides
<br />i ncent I va for vo I untary and acce I erated
<br />participation by farm operators.
<br />
<br />2. A detai led conservation plan for each
<br />farm, including an Irrigation management
<br />plan.
<br />
<br />3. A larger staff In the SCS Field Offices
<br />serving the Delta and Shavano SCDs to
<br />service the accelerated work load.
<br />
<br />4. A comm I tment by each farmer to improve
<br />his irrigation system and practices.
<br />
<br />The USDA Soi I Conservation Service provides
<br />Information and educational programs to all
<br />people without regard to race, age, sex,
<br />color or national origin.
<br />
<br />GPO 850-872
<br />
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<br />
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<br />
<br />COLORADO
<br />
<br />Lo.,.r Gunnison
<br />Bosln
<br />
<br />
<br />ON-FARM SALINITY CONTROL
<br />FOR
<br />LOWER GUNNISON BASIN
<br />
<br />
<br />~
<br />
<br />u.s. DEPARTMENT OF AGRICULTURI
<br />SOIL CONSERVATION SERVICE
<br />DENVER, COLORADO
<br />MAY, 1979
<br />
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