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Paper No. 11
Presentation Time: 10:45 AM

CENTRAL FARMERS – GEORGETOWN CANYON FERTILIZER FACILITY REMEDIAL ACTION PLAN IMPLEMENTATION 2009-2010


HART, Mitchell, Nu-West Industries, Inc, 680 East Pioneer Drive, Soda Springs, ID 83276, mhart@agrium.com

In 1957, Central Farmers Fertilizer Company constructed an electric arc furnace in Georgetown Canyon in southeast Idaho to extract elemental phosphorus and produce fertilizer from ore obtained from the nearby Georgetown Canyon mine. Both the mine and fertilizer facility are located on patented claims. The fertilizer plant operated from the mid-1950s to mid-1960s. The facility closed in 1964 due to operational and economic difficulties.

In 2001, Nu-West demolished the plant structures. In 2004, Nu-West entered into a Consent Judgment with the State of Idaho to conduct a Site Investigation (SI) and develop a Remedial Action Plan (RAP) with the Idaho Department of Environmental Quality (IDEQ) as lead agency.

As a result of the SI and risk assessments, the RAP was developed in 2008 and approved by the IDEQ in early 2009. The RAP called for a two-phased approach. The first phase was completed in the summer and fall of 2009. The plant site was dewatered and graded drainages were improved and stabilized and the stockpiled ore was removed from the site and sold locally. Certain site features were capped with geomembranes, covered with clean native materials derived from Nu-West property, and reclaimed with approved seed mixes

The second phase of the RAP was completed in 2010. Approximately 2,600 feet of creek channel was reconstructed around the former plant site features to allow Georgetown Creek to be taken out of a corrugated metal pipe and “daylighted”, thereby reestablishing and restoring the creek that had been encased beneath the plant site since the early/mid 1950’s.

By executing the RAP, Nu-West will assure that the long-term risks to human health and ecologic receptors from environmental impacts will be mitigated and that risks from previously exposed media will be eliminated.

Mitchell J. Hart, P.E., Manager, Mining Projects and Remediation, Nu-West Industries, Inc. and Agrium Conda Phosphate Operations (CPO) -- Mr. Hart is a Registered Professional Mining Engineer with almost 30 years of experience. He holds a B.S. degree in Mining Engineering from the University of Utah.

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