Aon Affinity, the consumer, association and program business of Aon Risk Solutions, has completed its acquisition of StoneRiver National Flood Services, Inc. and related entities from StoneRiver Group, L.P.

The deal was first announced in June. Financial terms were not disclosed.

National Flood Services offers policy administration, claims processing, customer service and agency support for clients in all 50 states and every U.S. territory. It manages 3 million flood policies and $2.3 billion of flood insurance premium annually.  The firm has more than 800 employees in offices in Kalispell, Montana; Overland Park, Kansas and Lakeland and Coral Springs, Florida.

Bill Vit, president and CEO of Aon Affinity, said NFS will help Aon Affinity “expand its flood solutions to reach a larger client base with this growing sector.”

Keith Brown, president and CEO of National Flood Services, will remain in his position at National Flood Services, reporting directly to Vit.