SACRAMENTO, CALIF. — The Allen Group and the California Farm Bureau Federation have created a joint venture to develop The River Plaza Corporate Center, a 175,000-square-foot office park located at 2500 River Plaza Dr. in Sacramento. The first phase of the project consists of six two-story buildings, which are slated for completion this summer. When complete, the center will offer 12 separate two-story buildings ranging in size from 11,000 to 17,000 square feet, in a garden office setting. Each for-sale building offers a private garage, stair and elevator access, ample on-grade parking and 24-foot vaulted open-beam ceilings with clerestory skylights on the second floor. Smith Consulting Architects provided architectural services for the project; Brown Construction is serving as general contractor. Bank of America provided construction financing for the project, and CB Richard Ellis has been retained to market the center.