American Midstream Partners, an LP that owns and operates a diversified portfolio of natural gas midstream assets, announced terms for its IPO on Monday. The Denver, CO-based company plans to raise $75 million by offering 3.8 million shares at a price range of $19 to $21. At the mid-point of the proposed range, American Midstream Partners, LP will command a market value of $181 million. American Midstream Partners, which was founded in 2009 and booked $221 million in sales for the 12 months ended March 31, 2011, plans to list on the NYSE under the symbol AMID. Citi and BofA Merrill Lynch are the lead underwriters on the deal, which is set to price during the week of July 25.