Two midsize firms in the Mountain West and California, Fennemore Craig and Dowling Aaron, have voted to merge to create a 180-lawyer practice with 10 offices.

The merger, effective Oct. 1, was announced Tuesday, after the firms’ lawyers voted to approve the deal earlier this month. The tie-up would create a combined firm with up to about $95 million in combined gross revenue, including about $20 million from Dowling Aaron, said Fennemore Craig’s CEO, James Goodnow, who will remain chief executive of the combined firm.