As many as 98 people are believed to have died during the construction of the Forth Rail Bridge, according to a local history group.
Experts are still investigating the exact death toll
Research by members of the Queensferry History Group shows there were far more than the 57 workers who died as recorded previously.
The group is now planning a memorial to the workers who died to ensure their sacrifice is remembered.
Talks with the Scottish Arts Council and Edinburgh Council are under way.
Len Chapman, of the Queensferry History Group, said: "At the beginning of the project, the people were in the foundations 90ft below sea level so there was the danger of the bends, the in-rush of the sea and danger of drowning.
"Later on, there was the danger of objects falling on the people from above and of people falling from a great height.
"There are also many stories of people being crushed by steelwork coming adrift and on the bridge, which struck men on the way down."