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<br />test results. ..A CHANGE IN PLANS
<br />
<br />Pump testing and monitoring began in
<br />r"arch 1980 and consisted of installing 18
<br />production wells and 100 monitoring wells,
<br />along with a temporary brine holding pond
<br />and 3 miles of pipeline.
<br />Results over the next few months
<br />showed that by pumping brine at a rate of
<br />1.2 cubic feet per second (540 gallons per
<br />minute) approximately 60 percent of the
<br />past 8-year's average brine inflow could
<br />be controlled. Originally, a 5 cfs pumping
<br />rate was anticipated as being necessary to
<br />control brine inflow to the Dolores River.
<br />We anticipate that by installing a few
<br />more pumping wells in strategic locations
<br />and pumping at 2 cfs (900 gpm), we can re-
<br />move the originally estimated 180,000 tons
<br />of salt per year. The chart below shows
<br />the results of the 1980 pump testing (note
<br />the reduced salt tonnage entering the riv-
<br />er after starting major pump testing in
<br />Ma rc h) .
<br />
<br />Average Daily Salt Pickup
<br />By Dolores River
<br />
<br />1000
<br />
<br />900
<br />
<br />Before Pumping
<br />(1971,/979
<br />(Average)
<br />---,
<br />,
<br />,
<br />,
<br />,
<br />,
<br />,
<br />
<br />800
<br />
<br />700
<br />&600
<br />"-
<br />.,
<br />c:: 500
<br />~
<br />" 400
<br />'"
<br />'2
<br />~ =
<br />oq:
<br />
<br />r--------
<br />r---
<br />,
<br />: Actual
<br />,
<br />: /980
<br />,
<br />:--:_ uS----"
<br />,
<br />,
<br />,
<br />,
<br />--.., ,
<br />L.__-'
<br />
<br />200
<br />
<br />
<br />100
<br />
<br />o
<br />
<br />J
<br />
<br />FMAMJ
<br />
<br />J
<br />
<br />ASONO
<br />
<br />MONTH
<br />
<br />The Bureau
<br />partment of
<br />the Paradox
<br />
<br />of Reclamation, U.S. De-
<br />the Interior, is planning
<br />Valley Unit.
<br />
<br />The Durango Projects
<br />sponsible for planning
<br />
<br />Office is re-
<br />and testing.
<br />
<br />The Montrose Projects Office is re-
<br />sponsible for construction.
<br />
<br />
<br />Pumping and Disposal System
<br />~~~
<br />. ~~
<br />1~ .
<br />~
<br />
<br />
<br />......-:.:./:.:-
<br />..............:.:.::::~~.:....
<br />.................~...
<br />................'...... ... :::::~;;~<:::::.,.
<br />?t:f:::::+:f:::::~~::: :j::-'
<br />....-:.SO~!l.QIld.GrQv.I.::-. ,'::; , ",
<br />~".I~~f~....:;:;::::,.~q~Wai~;~~::;:;~,
<br />
<br />new plan...DEEP,WELL INJECTION
<br />
<br />Last year's findings that a
<br />pumping rate of 2 cfs was
<br />sufficent to control brine
<br />inflow changed the criteria for
<br />evaluating disposal methods,
<br />making another alternative,
<br />deep-well injection, more at-
<br />tractive from technical, econom-
<br />ic and environmental
<br />standpoints. Basically, the idea
<br />consists of disposing of the
<br />brine in a permeable geologic
<br />formati_on deep under Paradox
<br />Valley, as illustrated here.
<br />A private engineering
<br />consultant has been hired to
<br />study deep-well injection. By
<br />December 1981, detailed designs
<br />and cost estimates will be
<br />available. Afterwards, a test
<br />injection well will be built and
<br />operated for several months be-
<br />fore a final decision is made.
<br />Well-field testing and verifica-
<br />tion will continue, although
<br />studies on evaporation pond dis-
<br />posal have been suspended until
<br />more information is available on
<br />deep-well injection.
<br />
<br />~~\,';~:: ~',,:~,-,
<br />;~~,~,~~,~~,~
<br />
<br />~:i')
<br />
<br />
<br />For additional
<br />call or write:
<br />
<br />information please
<br />
<br />00 278
<br />
<br />Durango Projects Office
<br />835 Second Avenue
<br />Durango, Colorado 81301
<br />(303) 247,0247
<br />
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