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<br />- <br /> <br />-- <br /> <br />. <br /> <br />, <br /> <br />~ .Salinity Update <br /> <br />c.:> <br /> <br />- <br /> <br />u.s. Department of the Interk>r <br />Water and Power Resources Service <br /> <br />A Quarterly report on the <br />Colorado River Water Quality <br />Improvement Program <br /> <br />December 1980 <br /> <br />Conslruclion Begins in Grand Valley <br /> <br /> <br />~ <br /> <br />rJ oil <br /> <br /> <br />. :ht <br />\ "'. .' <br />. ! ,f)1ir/l' <br />,fl'lt; <br /> <br />, -~.. <br /> <br />.' 11 <br />' -11, " <br />....~' <br /> <br />., <br /> <br />Construction began October 20 on <br />Stage One Canal 01 the Gra"d Valley <br />Unll 01 the COloradO River Basm Salinity <br />Control Program In ....estern Colorado. <br />Water and Power Resources Serl/lce IS <br />thus one slep closer 10 conlrollmg Ihe <br />salinity of In€' COloradO River, a problem <br />that has plagued the western United <br />Slates and MeXICO for years <br /> <br />Grand Valley cOllers abauI122.000 acres <br />In western Colorado near Ihe city 01 <br />Grand Junction Almosl twO-Hmds 01 <br />the valley IS Irrigated whiCh adds about <br />780,000 tons of salt annually to tne <br />Colorado RlvE>r /1,1051 of the salt IS <br />leaChed from the soil and undE'rlymg <br />marinE' shale by deep percolation Irom <br />excess Irrigation and 'hater delivery <br />system losses The total Grand Valley <br />unit IS expected to reduce the salt loac <br />by about ":10,000 tons annually <br /> <br />, <br /> <br />, <br />'1!Il <br /> <br />~ <br /> <br />.:l <br />s, ~;:J <br /> <br />,'--r,~~. <br />''', <br />~ ~~~ <br /> <br />,.,. <br /> <br />t... <br /> <br />, oil <br />, <br /> <br /> <br />Water and Power plans to Imethecanals <br />....,th concrele and place the laterals m <br />pipe to reduce seepage The Department <br />of Agriculture will promote onlarm <br />Improvements Including upgrading of <br />Ifflgatlon systems and management <br />Water and Power plans also Include a <br />Wildlife area and watering pondS to <br />compensate tor wildlife habitat losses <br />resulting from the canal and lateral <br />Improvement program. II apDro~'ed by <br />the Congress <br /> <br />Final speCifications for closed pipe <br />laterals In the Stage One area are being <br />prepared by Water and Power The <br />contract ShOuld be awarded early In <br />1981 Construction oflhe pipe laterals IS <br />e",pected 10 ta"e abOul two years <br /> <br />A contract for construCllon ollhe field <br />statron was awarded July B. , 980. to <br />Leon Par"erson tor S363,000 The <,:on- <br />tractor mo~ed onto the site In Septemoer <br />ana el<pects to complete the statIOn by <br />May 19f1 '- <br /> <br />L <br /> <br />. <br />t <br /> <br /> <br />~:: ) <br />-... .,....., <br />, , <br /> <br />, <br /> <br />t-., ~:.. <br />... '~ <br />~: <br />-, <br /> <br />.ft;. <br />..~. <br /> <br />A $7.: million contract for lining and <br />rehabilitation of structures III a 6 B mile <br />SE'ctlon at the Government Hlghlme <br />Canal was awarded 10 Peter KieWit Sons <br />Company on August 5. 1980 Notice to <br />proceed .....as given August 11 ,1980, and <br />the contraClOr mo~ed onSlte on August <br />'8 1980 Although the contract calls tor <br />completion by August 19B3.1hecantrac- <br />tor I!1tends 10 complele the canal lining <br />clurl!1g the 1980-1981 .....,nler Water and <br />po.....er has re~.'seo matenal handling <br />procedures to accommooale mal <br />schedule <br /> <br />MUCh preliminary work IS requlreCl <br />betoH' placlllg the concrete lining In the <br />canal The canal must be cleaned at all <br />grass and unSUitable materials. all <br />unSUitable malerlal anCl shale will be <br />remO\'eo to Ine c.teptn reQUlrea The <br />e~lstlng canal prism wdltnen be Iilled <br />With SOil and compacted to soecllled <br />