Northern Natural Gas Company

Fifth Revised Volume No. 1

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Effective Date: 08/01/2004, Docket: RP04-420-000, Status: Effective

Second Revised Sheet No. 272 Second Revised Sheet No. 272 : Effective

Superseding: First Revised Sheet No. 272

GENERAL TERMS AND CONDITIONS

35. ANNUAL RATE ADJUSTMENT TO REFLECT

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GAS RESEARCH INSTITUTE CHARGES (GRI)

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Purpose. Northern has joined with other gas enterprises in the

formation of, the participation in the activities of, and the

financing of the Gas Research Institute ("G.R.I."), an Illinois

not-for-profit corporation. G.R.I. has been organized for the

purpose of sponsoring Research, Development and Demonstration ("RD&D")

programs in the field of natural and manufactured gas for the purpose

of assisting all segments of the gas industry in providing adequate,

reliable, safe, economic and environmentally acceptable gas service

for the benefit of gas consumers and the general public.