The congregation wants to shore up the building, which is in an area where heavy traffic has contributed to its shifting foundation.
Dedicated in 1855 by runaway slaves and free blacks, the church needs cable wires to secure the log frame of the building ahead of expected nearby construction and wants to replace parts of the building that are deteriorating or damaged.
Salem Chapel is in St. Catharines, Ontario, a spot known as an end point of the Underground Railroad, the multipronged clandestine route through which slaves escaped to freedom. Some of the people Tubman helped escape became members of the church.
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Rochelle Bush, one of the 11 remaining members who launched the campaign, is the great-great-great-granddaughter of the Rev. James Harper, who was the minister in charge of the congregation when Tubman attended and when it changed its affiliation from the African Methodist Episcopal Church to BME.
"We became British Methodist Episcopal in 1856 because nobody wanted to go back for conference (in the United States) because of the fugitive slave laws," Bush said, adding that about 10 churches in Ontario remain British Methodist Episcopal and consider the AME Church their parent organization.
After the Civil War, the church, which began with 195 members, began to dwindle as members returned across the border, decreasing to about 40 in 1970. Most of its members now are age 80 and older.
The congregation, which continues to meet for worship each Sunday with a pastor and a pianist, has been sustained by tourists, who increased from about 2,500 annually to 4,000 this year, Bush said. Visitors pay a $5 admission to learn about "the who's who in the abolitionist movement" — including Frederick Douglass and John Brown — who have visited the church.
"That's what helps us keep the church doors open and it pays the bills throughout the winter season," she said.
But now, the church's members say they need more assistance to keep their building available for future generations.
"(W)e want to ensure that it continues to serve as a religious institution and because it is an important treasure in North American history," they said.