RICHMOND, VA. — StoneBridge Investments has acquired Copper Spring, a 366-unit apartment community located at 3301 Copper Mill Trace in Richmond, for $54.2 million. Eastdil Secured arranged the transaction on behalf of the seller, an affiliate of Atlanta-based Clarion Partners. Constructed in 1989 and renovated in 2006, the property features two resort-style pools, a fitness center, business center, lighted tennis courts, racquetball court, grilling stations, gaming area and a coffee bar. StoneBridge plans to upgrade the clubhouse and other common-area amenities, as well as some individual residences. ZRS Management, an affiliate of StoneBridge, will mange Copper Spring.