with facilities in the states of Illinois and Idaho, is owned by the United States govemment, and op_' lted by the University of Chicago under the provisions of a contract with te Department of Energy. This technical report is a product of Argonne's Er ironmental Assessment and Information Sciences Division. For informatir n on the division's scientific and engineering activities, contact:

Back: Lower Beaver Falls lies approximately 4 miles up Havasu Creek from its confluence with the Colorado River at river mile 157 and is the site of ongoing endangered humpback chub translocations.

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