Kelso Marine Inc., Galveston, Texas, has become a wholly-owned subsidiary of C. Brewer and Co., Honolulu, following closing of documents providing for an exchange of stock, it was announced.

Kelso Marine is engaged in the sale and distribution of concrete, sand, gravel and other building materials along with the construction of barges and motor vessels. The company is expected to begin construction shortly on a 16,000-ton barge for Ultramar Chemical Co., another Brewer division. The vessel will be used for the transportation of fertilizer products from the West Coast to Hawaii.