Nothern Natural Gas, West Des Moines, IA No description specified. 1-1 (1 Record) Documents Nothern Natural Gas - Dm B to Grin Bl, Proposed Connection of 2 Pipelines with a Tie-Over to Guarantee Fuel for Customers - Sections 5 and 6, T79N-R24W - Letter Report from Augustana College (2002)