Developmental Services Inc. is merging with Four Rivers to become one of the biggest agencies of its type in the state.

The two agencies will combine to serve children and adults with disabilities in 56 counties after the merger goes into effect in November. According to an announcement from the agencies, they provide supported living, group homes, job placement and supported employment, work services, adult day services, preschool, health and wellness, affordable housing and information and referral.

The agencies do not expect to reduce services, but do believe they will save costs by merging.

Four Rivers was founded in 1986 and serves 14 counties, while DSI opened in 1975 and serves 44 counties. There is already some overlap in their service areas.