What are some suggestions for keeping bears out of active beehives? I live in Colorado.

In Colorado, beekeeping generates close to $2 million a year through the sale of honey. In addition, bees provide a valuable service to agriculture and homeowners by pollinating crops and gardens. Successful bee yards are usually located in protected areas near water and flowering crops or wildflowers. Mountain meadows and agricultural lands along the foothills meet these criteria. The amount of black bear damage to beehives in Colorado varies each year, possibly reflecting fluctuations in the bears’ food supply. Black …