Many members recognize the importance of the the mission of the NPRHA - the preservation of the NP’s information, photographs and artifacts. This mission has never been more important than right now. While many members have been very generous by contributing extra to the NPRHA as Sustaining members and to the Preservation Fund, many wish to demonstrate even stronger support by increasing their contribution level now and in the future. For that reason, the Board has established five graduated, levels of Sustaining membership. As a Sustaining Member you receive The Mainstreeter magazine and annual calendar by First Class postage where ever you live and the understanding that you are helping to preserve the Northern Pacific.