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<br />p a~I\iArt.9
<br />80A.91)
<br />
<br />Department of the Interior
<br />eau of Reclamation
<br />
<br />Quarterly Report on the
<br />olorado River Water Quality
<br />mprovement Program
<br />
<br />\ul. 6, '0.3 Jul) 1986
<br />
<br />Final EIS filed on Grand
<br />Vallel Unit
<br />
<br />Reclamation i~ completing final
<br />acti\'ities before issuing ~pecificaliom and
<br />a....arding a COOlra~1 for the tlrst pha!>C of
<br />Grand Valley Unll Stage T....o
<br />construction
<br />The final en\lronmenla] Slalemem ...as
<br />filed ",ith the En\'lfonrnentaJ Protection
<br />Agency in .\fay 19116, Once a decision is
<br />made 10 con~lr~CI Stagc Two, we make a
<br />contract award. scheduled for September
<br />199b, thaI in\'ol\'es membrane.lining
<br />approxjmalel~ 7 miles oj the Goscrnment
<br />Highline Canal in a portIOn called the
<br />west end.
<br />The canal e~lends from the end of the
<br />canal segment lined undt'r St<lgt' OnC' 10
<br />the canal's terminus approximately 6
<br />miles north.....t'~t of ."fad. RC'placmg or
<br />impros'mg farm and lateral turnout~ and
<br />other canal ~tructures is also pan 01 the
<br />canal improsement proJ('(:t expet:ted to be
<br />completed in 1988. The next portLon of
<br />the Stage Two plan will replace- with pipe
<br />lalnals approximatd)' 36 miles of ope-n-
<br />earth laterals sersed b)' the ....est end
<br />ponion of the Go\ernment HighhnC'
<br />Canal.
<br />The entire Stagc T....o plan pro\,des for
<br />membrane. linin!! a IOtal of 38 miles 01
<br />tht' Goscrnment Hlghline Canal and
<br />replacing a tOlal of 308 mile-s of exisTmg
<br />laterals ....lIh pipt', The membrane hmng
<br />would No 2o-mil poly'slnyl chloride
<br />coserC'd ....'ilh l-l to 19 inches of earth and
<br />gra\el.
<br />Cros~-drainage (calures ....ill No
<br />constructe-d and ....auld include detcntion
<br />ditchn and dike,. Four detentIOn dams
<br />....ould be used to create small
<br />impoundments for levdmg out
<br />streamflo....s in natural drainages. T....o
<br />automated moss and debTls remo\al
<br />s!ru.:turcs ....iIl aho be IOMalled,
<br />~leasures are also m.:luded lfl the Stage
<br />T....o plan to compC'nsate for ....lldlife
<br />habJlal los!i-C's that result from lflcreased
<br />deselopment from the entITe Grand
<br />\'allc~' Unn. COMUUClJOn cosu. for the
<br />enTirt' Stage T....o plan arc estimated at
<br />approximately $190 million, Sail loading
<br />to the Colorado Ri\cr ....ill be reduced b)
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<br />Ihis ..oDd..n bridlr urt>~~ Ih.. ......1 rnd por1ioll of Ih.. (;o'emmrnl lIi.hlinr C.n.1. loalt'd "'f'S1
<br />of '\-hC'l. Colo",do. in \-ir... CoUnl). r. IlPio.l of OIMr brid..., ..hich ..ill b-r ",plllet'd ail p.n of
<br />"'.X" t..o dr.elopm"ol of Ihr (~",nd \.Illlr~ lllil.
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<br />,<\ppro\.Jm..rl) .)OS miln 01 uohnt'd Go...mm"OI Hjlhliot' Caoall.,..,..h ..ill bt' lint'd "lIb burit'd
<br />pipt' u p.n of "'a,r 1"0 drHlopmrol. Thh phoIOfl",ph.... I.kro ill thO' ..in1.., of !<lU dllrina:
<br />",.,.. OliO' cOlblrvC'tion,
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